## 10.6


[New LWP 529254]
[New LWP 529255]
[New LWP 529256]
[New LWP 529257]
[New LWP 529261]
[New LWP 529262]
[New LWP 529264]
[New LWP 529266]
[New LWP 529271]
[New LWP 529330]
[New LWP 530096]
[New LWP 531405]
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[New LWP 531408]
[New LWP 531409]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007ff1cfc5baff in __GI___poll (fds=0x61200001bfc8, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
29	../sysdeps/unix/sysv/linux/poll.c: No such file or directory.

Thread 16 (Thread 0x7ff1c02fb700 (LWP 531409)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x000056041190e5cb in srw_mutex_impl<false>::wait (this=0x560414156c08 <dict_sys+72>, lk=2147483655) at /10.6/src/storage/innobase/sync/srw_lock.cc:348
#2  0x000056041190c47c in srw_mutex_impl<false>::wait_and_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/sync/srw_lock.cc:461
#3  0x00005604114cb60f in srw_mutex_impl<false>::wr_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/include/srw_lock.h:80
#4  0x000056041190d906 in ssux_lock_impl<false>::rd_wait (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/sync/srw_lock.cc:523
#5  0x00005604117e0a35 in ssux_lock_impl<false>::rd_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/include/srw_lock.h:214
#6  0x000056041190daeb in srw_lock_impl<false>::psi_rd_lock (this=0x560414156c00 <dict_sys+64>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=834) at /10.6/src/storage/innobase/sync/srw_lock.cc:581
#7  0x0000560411916fe7 in srw_lock_impl<false>::rd_lock (this=0x560414156c00 <dict_sys+64>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=834) at /10.6/src/storage/innobase/include/srw_lock.h:481
#8  0x0000560411aee95b in dict_sys_t::freeze (this=0x560414156bc0 <dict_sys>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=834) at /10.6/src/storage/innobase/dict/dict0dict.cc:997
#9  0x0000560411aed4ce in dict_table_open_on_id (table_id=15, dict_locked=false, table_op=DICT_TABLE_OP_NORMAL, thd=0x62b000031288, mdl=0x61f000001168) at /10.6/src/storage/innobase/dict/dict0dict.cc:834
#10 0x000056041186c831 in row_purge_parse_undo_rec (node=0x61f000000fc8, undo_rec=0x621000044e38 "", thr=0x61f000000f20, updated_extern=0x7ff1c02fa820) at /10.6/src/storage/innobase/row/row0purge.cc:1028
#11 0x000056041186e0e3 in row_purge (node=0x61f000000fc8, undo_rec=0x621000044e38 "", thr=0x61f000000f20) at /10.6/src/storage/innobase/row/row0purge.cc:1206
#12 0x000056041186e531 in row_purge_step (thr=0x61f000000f20) at /10.6/src/storage/innobase/row/row0purge.cc:1258
#13 0x000056041174b36d in que_thr_step (thr=0x61f000000f20) at /10.6/src/storage/innobase/que/que0que.cc:653
#14 0x000056041174b715 in que_run_threads_low (thr=0x61f000000f20) at /10.6/src/storage/innobase/que/que0que.cc:709
#15 0x000056041174b8b7 in que_run_threads (thr=0x61f000000f20) at /10.6/src/storage/innobase/que/que0que.cc:729
#16 0x00005604118f0625 in srv_task_execute () at /10.6/src/storage/innobase/srv/srv0srv.cc:1716
#17 0x00005604118f11d5 in purge_worker_callback () at /10.6/src/storage/innobase/srv/srv0srv.cc:1959
#18 0x0000560411cd6952 in tpool::task_group::execute (this=0x560414df3f40 <purge_task_group>, t=0x560414df4000 <purge_worker_task>) at /10.6/src/tpool/task_group.cc:55
#19 0x0000560411cd721b in tpool::task::execute (this=0x560414df4000 <purge_worker_task>) at /10.6/src/tpool/task.cc:32
#20 0x0000560411cc39c9 in tpool::thread_pool_generic::worker_main (this=0x618000001080, thread_var=0x63000002fd80) at /10.6/src/tpool/tpool_generic.cc:549
#21 0x0000560411cd63b3 in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x604000002668: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x560411cc37e6 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x604000002660: 0x618000001080) at /usr/include/c++/9/bits/invoke.h:73
#22 0x0000560411cd615e in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x604000002668: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x560411cc37e6 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#23 0x0000560411cd5fef in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000002658) at /usr/include/c++/9/thread:244
#24 0x0000560411cd5f39 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000002658) at /usr/include/c++/9/thread:251
#25 0x0000560411cd5e9e in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000002650) at /usr/include/c++/9/thread:195
#26 0x00007ff1cff7ade4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#27 0x00007ff1d0095609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#28 0x00007ff1cfc68293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7ff1c38ca700 (LWP 531408)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x000056041190e5cb in srw_mutex_impl<false>::wait (this=0x560414156c08 <dict_sys+72>, lk=2147483650) at /10.6/src/storage/innobase/sync/srw_lock.cc:348
#2  0x000056041190c47c in srw_mutex_impl<false>::wait_and_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/sync/srw_lock.cc:461
#3  0x00005604114cb60f in srw_mutex_impl<false>::wr_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/include/srw_lock.h:80
#4  0x000056041190d906 in ssux_lock_impl<false>::rd_wait (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/sync/srw_lock.cc:523
#5  0x00005604117e0a35 in ssux_lock_impl<false>::rd_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/include/srw_lock.h:214
#6  0x000056041190daeb in srw_lock_impl<false>::psi_rd_lock (this=0x560414156c00 <dict_sys+64>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=619) at /10.6/src/storage/innobase/sync/srw_lock.cc:581
#7  0x0000560411916fe7 in srw_lock_impl<false>::rd_lock (this=0x560414156c00 <dict_sys+64>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=619) at /10.6/src/storage/innobase/include/srw_lock.h:481
#8  0x0000560411aee95b in dict_sys_t::freeze (this=0x560414156bc0 <dict_sys>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=619) at /10.6/src/storage/innobase/dict/dict0dict.cc:997
#9  0x0000560411b09c72 in dict_table_t::parse_name<false> (this=0x61800015f520, db_name=..., tbl_name=..., db_name_len=0x7ff1c38c9040, tbl_name_len=0x7ff1c38c9060) at /10.6/src/storage/innobase/dict/dict0dict.cc:619
#10 0x0000560411b0baa1 in dict_acquire_mdl_shared<true> (table=0x61800015f520, thd=0x62b00001c288, mdl=0x7ff1c38c9780, table_op=DICT_TABLE_OP_NORMAL) at /10.6/src/storage/innobase/dict/dict0dict.cc:784
#11 0x0000560411c29d0d in fts_optimize_sync_table (table=0x61800015f520, process_message=true) at /10.6/src/storage/innobase/fts/fts0opt.cc:2784
#12 0x0000560411c2a722 in fts_optimize_callback () at /10.6/src/storage/innobase/fts/fts0opt.cc:2892
#13 0x0000560411cd6952 in tpool::task_group::execute (this=0x560414e04cc0 <task_group>, t=0x560414e04d80 <task>) at /10.6/src/tpool/task_group.cc:55
#14 0x0000560411cd721b in tpool::task::execute (this=0x560414e04d80 <task>) at /10.6/src/tpool/task.cc:32
#15 0x0000560411cc39c9 in tpool::thread_pool_generic::worker_main (this=0x618000001080, thread_var=0x63000002fc80) at /10.6/src/tpool/tpool_generic.cc:549
#16 0x0000560411cd63b3 in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x604000002628: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x560411cc37e6 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x604000002620: 0x618000001080) at /usr/include/c++/9/bits/invoke.h:73
#17 0x0000560411cd615e in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x604000002628: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x560411cc37e6 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#18 0x0000560411cd5fef in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000002618) at /usr/include/c++/9/thread:244
#19 0x0000560411cd5f39 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000002618) at /usr/include/c++/9/thread:251
#20 0x0000560411cd5e9e in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000002610) at /usr/include/c++/9/thread:195
#21 0x00007ff1cff7ade4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#22 0x00007ff1d0095609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#23 0x00007ff1cfc68293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7ff1ba5c0700 (LWP 531407)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x000056041190e5cb in srw_mutex_impl<false>::wait (this=0x560414156c08 <dict_sys+72>, lk=2147483651) at /10.6/src/storage/innobase/sync/srw_lock.cc:348
#2  0x000056041190c47c in srw_mutex_impl<false>::wait_and_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/sync/srw_lock.cc:461
#3  0x00005604114cb60f in srw_mutex_impl<false>::wr_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/include/srw_lock.h:80
#4  0x00005604114c19d2 in ssux_lock_impl<false>::wr_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/include/srw_lock.h:224
#5  0x000056041190ddab in srw_lock_impl<false>::psi_wr_lock (this=0x560414156c00 <dict_sys+64>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=1300) at /10.6/src/storage/innobase/sync/srw_lock.cc:598
#6  0x00005604116b8b43 in srw_lock_impl<false>::wr_lock (this=0x560414156c00 <dict_sys+64>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=1300) at /10.6/src/storage/innobase/include/srw_lock.h:494
#7  0x0000560411aee46c in dict_sys_t::lock_wait (this=0x560414156bc0 <dict_sys>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=1300) at /10.6/src/storage/innobase/dict/dict0dict.cc:980
#8  0x00005604114b53e6 in dict_sys_t::lock (this=0x560414156bc0 <dict_sys>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=1300) at /10.6/src/storage/innobase/include/dict0dict.h:1571
#9  0x0000560411af0f1f in dict_sys_t::evict_table_LRU (this=0x560414156bc0 <dict_sys>, half=false) at /10.6/src/storage/innobase/dict/dict0dict.cc:1300
#10 0x00005604118efba2 in srv_master_do_idle_tasks (counter_time=159488395542) at /10.6/src/storage/innobase/srv/srv0srv.cc:1605
#11 0x00005604118f028b in srv_master_callback () at /10.6/src/storage/innobase/srv/srv0srv.cc:1663
#12 0x0000560411cc7516 in tpool::thread_pool_generic::timer_generic::run (this=0x612000004e40) at /10.6/src/tpool/tpool_generic.cc:313
#13 0x0000560411cc77f8 in tpool::thread_pool_generic::timer_generic::execute (arg=0x612000004e40) at /10.6/src/tpool/tpool_generic.cc:332
#14 0x0000560411cd727f in tpool::task::execute (this=0x612000004e80) at /10.6/src/tpool/task.cc:37
#15 0x0000560411cc39c9 in tpool::thread_pool_generic::worker_main (this=0x618000001080, thread_var=0x63000002fb80) at /10.6/src/tpool/tpool_generic.cc:549
#16 0x0000560411cd63b3 in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x6040000025e8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x560411cc37e6 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x6040000025e0: 0x618000001080) at /usr/include/c++/9/bits/invoke.h:73
#17 0x0000560411cd615e in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x6040000025e8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x560411cc37e6 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#18 0x0000560411cd5fef in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x6040000025d8) at /usr/include/c++/9/thread:244
#19 0x0000560411cd5f39 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x6040000025d8) at /usr/include/c++/9/thread:251
#20 0x0000560411cd5e9e in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x6040000025d0) at /usr/include/c++/9/thread:195
#21 0x00007ff1cff7ade4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#22 0x00007ff1d0095609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#23 0x00007ff1cfc68293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7ff1badd7700 (LWP 531405)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7ff1badd6810, clockid=<optimized out>, expected=0, futex_word=0x63000002f928) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7ff1badd6810, clockid=<optimized out>, mutex=0x618000001190, cond=0x63000002f900) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000002f900, mutex=0x618000001190, abstime=0x7ff1badd6810) at pthread_cond_wait.c:656
#3  0x0000560411cc6aef in __gthread_cond_timedwait (__cond=0x63000002f900, __mutex=0x618000001190, __abs_timeout=0x7ff1badd6810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x0000560411cce947 in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000002f900, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x0000560411ccc337 in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000002f900, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x0000560411cc9763 in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000002f900, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x0000560411cc2e6a in tpool::thread_pool_generic::wait_for_tasks (this=0x618000001080, lk=..., thread_data=0x63000002f900) at /10.6/src/tpool/tpool_generic.cc:449
#8  0x0000560411cc32c8 in tpool::thread_pool_generic::get_task (this=0x618000001080, thread_var=0x63000002f900, t=0x7ff1badd6bc0) at /10.6/src/tpool/tpool_generic.cc:502
#9  0x0000560411cc3908 in tpool::thread_pool_generic::worker_main (this=0x618000001080, thread_var=0x63000002f900) at /10.6/src/tpool/tpool_generic.cc:547
#10 0x0000560411cd63b3 in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x604000002568: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x560411cc37e6 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x604000002560: 0x618000001080) at /usr/include/c++/9/bits/invoke.h:73
#11 0x0000560411cd615e in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x604000002568: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x560411cc37e6 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x0000560411cd5fef in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000002558) at /usr/include/c++/9/thread:244
#13 0x0000560411cd5f39 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000002558) at /usr/include/c++/9/thread:251
#14 0x0000560411cd5e9e in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000002550) at /usr/include/c++/9/thread:195
#15 0x00007ff1cff7ade4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007ff1d0095609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007ff1cfc68293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7ff1b9da9700 (LWP 530096)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x000056041190e5cb in srw_mutex_impl<false>::wait (this=0x560414156c08 <dict_sys+72>, lk=2147483654) at /10.6/src/storage/innobase/sync/srw_lock.cc:348
#2  0x000056041190c47c in srw_mutex_impl<false>::wait_and_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/sync/srw_lock.cc:461
#3  0x00005604114cb60f in srw_mutex_impl<false>::wr_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/include/srw_lock.h:80
#4  0x000056041190d906 in ssux_lock_impl<false>::rd_wait (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/sync/srw_lock.cc:523
#5  0x00005604117e0a35 in ssux_lock_impl<false>::rd_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/include/srw_lock.h:214
#6  0x000056041190daeb in srw_lock_impl<false>::psi_rd_lock (this=0x560414156c00 <dict_sys+64>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=834) at /10.6/src/storage/innobase/sync/srw_lock.cc:581
#7  0x0000560411916fe7 in srw_lock_impl<false>::rd_lock (this=0x560414156c00 <dict_sys+64>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=834) at /10.6/src/storage/innobase/include/srw_lock.h:481
#8  0x0000560411aee95b in dict_sys_t::freeze (this=0x560414156bc0 <dict_sys>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=834) at /10.6/src/storage/innobase/dict/dict0dict.cc:997
#9  0x0000560411aed4ce in dict_table_open_on_id (table_id=14, dict_locked=false, table_op=DICT_TABLE_OP_NORMAL, thd=0x62b000046288, mdl=0x61b000002f80) at /10.6/src/storage/innobase/dict/dict0dict.cc:834
#10 0x000056041186c831 in row_purge_parse_undo_rec (node=0x61b000002de0, undo_rec=0x621000044db8 "", thr=0x61b000002d38, updated_extern=0x7ff1b9da8820) at /10.6/src/storage/innobase/row/row0purge.cc:1028
#11 0x000056041186e0e3 in row_purge (node=0x61b000002de0, undo_rec=0x621000044db8 "", thr=0x61b000002d38) at /10.6/src/storage/innobase/row/row0purge.cc:1206
#12 0x000056041186e531 in row_purge_step (thr=0x61b000002d38) at /10.6/src/storage/innobase/row/row0purge.cc:1258
#13 0x000056041174b36d in que_thr_step (thr=0x61b000002d38) at /10.6/src/storage/innobase/que/que0que.cc:653
#14 0x000056041174b715 in que_run_threads_low (thr=0x61b000002d38) at /10.6/src/storage/innobase/que/que0que.cc:709
#15 0x000056041174b8b7 in que_run_threads (thr=0x61b000002d38) at /10.6/src/storage/innobase/que/que0que.cc:729
#16 0x00005604118f0625 in srv_task_execute () at /10.6/src/storage/innobase/srv/srv0srv.cc:1716
#17 0x00005604118f11d5 in purge_worker_callback () at /10.6/src/storage/innobase/srv/srv0srv.cc:1959
#18 0x0000560411cd6952 in tpool::task_group::execute (this=0x560414df3f40 <purge_task_group>, t=0x560414df4000 <purge_worker_task>) at /10.6/src/tpool/task_group.cc:55
#19 0x0000560411cd721b in tpool::task::execute (this=0x560414df4000 <purge_worker_task>) at /10.6/src/tpool/task.cc:32
#20 0x0000560411cc39c9 in tpool::thread_pool_generic::worker_main (this=0x618000001080, thread_var=0x63000002fa00) at /10.6/src/tpool/tpool_generic.cc:549
#21 0x0000560411cd63b3 in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x6040000024e8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x560411cc37e6 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x6040000024e0: 0x618000001080) at /usr/include/c++/9/bits/invoke.h:73
#22 0x0000560411cd615e in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x6040000024e8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x560411cc37e6 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#23 0x0000560411cd5fef in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x6040000024d8) at /usr/include/c++/9/thread:244
#24 0x0000560411cd5f39 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x6040000024d8) at /usr/include/c++/9/thread:251
#25 0x0000560411cd5e9e in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x6040000024d0) at /usr/include/c++/9/thread:195
#26 0x00007ff1cff7ade4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#27 0x00007ff1d0095609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#28 0x00007ff1cfc68293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7ff1bbe05700 (LWP 529330)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x000056041190e5cb in srw_mutex_impl<false>::wait (this=0x560414156c08 <dict_sys+72>, lk=2147483652) at /10.6/src/storage/innobase/sync/srw_lock.cc:348
#2  0x000056041190c47c in srw_mutex_impl<false>::wait_and_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/sync/srw_lock.cc:461
#3  0x00005604114cb60f in srw_mutex_impl<false>::wr_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/include/srw_lock.h:80
#4  0x000056041190d906 in ssux_lock_impl<false>::rd_wait (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/sync/srw_lock.cc:523
#5  0x00005604117e0a35 in ssux_lock_impl<false>::rd_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/include/srw_lock.h:214
#6  0x000056041190daeb in srw_lock_impl<false>::psi_rd_lock (this=0x560414156c00 <dict_sys+64>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=834) at /10.6/src/storage/innobase/sync/srw_lock.cc:581
#7  0x0000560411916fe7 in srw_lock_impl<false>::rd_lock (this=0x560414156c00 <dict_sys+64>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=834) at /10.6/src/storage/innobase/include/srw_lock.h:481
#8  0x0000560411aee95b in dict_sys_t::freeze (this=0x560414156bc0 <dict_sys>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=834) at /10.6/src/storage/innobase/dict/dict0dict.cc:997
#9  0x0000560411aed4ce in dict_table_open_on_id (table_id=1722, dict_locked=false, table_op=DICT_TABLE_OP_NORMAL, thd=0x62b00003f288, mdl=0x61f000001428) at /10.6/src/storage/innobase/dict/dict0dict.cc:834
#10 0x000056041186c831 in row_purge_parse_undo_rec (node=0x61f000001288, undo_rec=0x621000045350 "", thr=0x61f0000011e0, updated_extern=0x7ff1bbe046b0) at /10.6/src/storage/innobase/row/row0purge.cc:1028
#11 0x000056041186e0e3 in row_purge (node=0x61f000001288, undo_rec=0x621000045350 "", thr=0x61f0000011e0) at /10.6/src/storage/innobase/row/row0purge.cc:1206
#12 0x000056041186e531 in row_purge_step (thr=0x61f0000011e0) at /10.6/src/storage/innobase/row/row0purge.cc:1258
#13 0x000056041174b36d in que_thr_step (thr=0x61f0000011e0) at /10.6/src/storage/innobase/que/que0que.cc:653
#14 0x000056041174b715 in que_run_threads_low (thr=0x61f0000011e0) at /10.6/src/storage/innobase/que/que0que.cc:709
#15 0x000056041174b8b7 in que_run_threads (thr=0x61f0000011e0) at /10.6/src/storage/innobase/que/que0que.cc:729
#16 0x00005604119241ab in trx_purge (n_tasks=4, truncate=false) at /10.6/src/storage/innobase/trx/trx0purge.cc:1302
#17 0x00005604118f382d in purge_coordinator_state::do_purge (this=0x560414df3c40 <purge_state>) at /10.6/src/storage/innobase/srv/srv0srv.cc:1814
#18 0x00005604118f139e in purge_coordinator_callback () at /10.6/src/storage/innobase/srv/srv0srv.cc:1968
#19 0x0000560411cd6952 in tpool::task_group::execute (this=0x560414df40c0 <purge_coordinator_task_group>, t=0x560414df4180 <purge_coordinator_task>) at /10.6/src/tpool/task_group.cc:55
#20 0x0000560411cd721b in tpool::task::execute (this=0x560414df4180 <purge_coordinator_task>) at /10.6/src/tpool/task.cc:32
#21 0x0000560411cc39c9 in tpool::thread_pool_generic::worker_main (this=0x618000001080, thread_var=0x63000002f780) at /10.6/src/tpool/tpool_generic.cc:549
#22 0x0000560411cd63b3 in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x604000002228: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x560411cc37e6 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x604000002220: 0x618000001080) at /usr/include/c++/9/bits/invoke.h:73
#23 0x0000560411cd615e in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x604000002228: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x560411cc37e6 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#24 0x0000560411cd5fef in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000002218) at /usr/include/c++/9/thread:244
#25 0x0000560411cd5f39 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000002218) at /usr/include/c++/9/thread:251
#26 0x0000560411cd5e9e in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000002210) at /usr/include/c++/9/thread:195
#27 0x00007ff1cff7ade4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#28 0x00007ff1d0095609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#29 0x00007ff1cfc68293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7ff1c0dbf700 (LWP 529271)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x000056041190e6da in ssux_lock_impl<false>::wait (this=0x560414156c08 <dict_sys+72>, lk=2147483649) at /10.6/src/storage/innobase/sync/srw_lock.cc:354
#2  0x000056041190d82f in ssux_lock_impl<false>::wr_wait (this=0x560414156c08 <dict_sys+72>, lk=2147483649) at /10.6/src/storage/innobase/sync/srw_lock.cc:509
#3  0x00005604114c1a49 in ssux_lock_impl<false>::wr_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/include/srw_lock.h:232
#4  0x000056041190ddab in srw_lock_impl<false>::psi_wr_lock (this=0x560414156c00 <dict_sys+64>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=4262) at /10.6/src/storage/innobase/sync/srw_lock.cc:598
#5  0x00005604116b8b43 in srw_lock_impl<false>::wr_lock (this=0x560414156c00 <dict_sys+64>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=4262) at /10.6/src/storage/innobase/include/srw_lock.h:494
#6  0x0000560411aedea8 in dict_sys_t::lock_wait (this=0x560414156bc0 <dict_sys>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=4262) at /10.6/src/storage/innobase/dict/dict0dict.cc:961
#7  0x00005604114b53e6 in dict_sys_t::lock (this=0x560414156bc0 <dict_sys>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=4262) at /10.6/src/storage/innobase/include/dict0dict.h:1571
#8  0x0000560411b04ccf in dict_index_set_merge_threshold (index=0x61600357fd20, merge_threshold=50) at /10.6/src/storage/innobase/dict/dict0dict.cc:4262
#9  0x000056041147c3c4 in innobase_parse_hint_from_comment (thd=0x62b0000ee288, table=0x618000186d20, table_share=0x7ff1c0dba890) at /10.6/src/storage/innobase/handler/ha_innodb.cc:11829
#10 0x0000560411531050 in ha_innobase::commit_inplace_alter_table (this=0x61d000312528, altered_table=0x7ff1c0db9fe0, ha_alter_info=0x7ff1c0db98e0, commit=true) at /10.6/src/storage/innobase/handler/handler0alter.cc:11296
#11 0x000056041097086e in handler::ha_commit_inplace_alter_table (this=0x61d000312528, altered_table=0x7ff1c0db9fe0, ha_alter_info=0x7ff1c0db98e0, commit=true) at /10.6/src/sql/handler.cc:5194
#12 0x000056041038583d in mysql_inplace_alter_table (thd=0x62b0000ee288, table_list=0x62b0000f53b8, table=0x6190002ac708, altered_table=0x7ff1c0db9fe0, ha_alter_info=0x7ff1c0db98e0, target_mdl_request=0x7ff1c0db99e0, ddl_log_state=0x7ff1c0db96c0, trigger_param=0x7ff1c0dba430, alter_ctx=0x7ff1c0dbaeb0) at /10.6/src/sql/sql_table.cc:7457
#13 0x000056041039a808 in mysql_alter_table (thd=0x62b0000ee288, new_db=0x62b0000f2e88, new_name=0x62b0000f32a0, create_info=0x7ff1c0dbc3a0, table_list=0x62b0000f53b8, alter_info=0x7ff1c0dbc270, order_num=0, order=0x0, ignore=false, if_exists=false) at /10.6/src/sql/sql_table.cc:10243
#14 0x000056041055a557 in Sql_cmd_alter_table::execute (this=0x62b0000f5af0, thd=0x62b0000ee288) at /10.6/src/sql/sql_alter.cc:538
#15 0x00005604100f5ddf in mysql_execute_command (thd=0x62b0000ee288, is_called_from_prepared_stmt=false) at /10.6/src/sql/sql_parse.cc:5997
#16 0x00005604101035b0 in mysql_parse (thd=0x62b0000ee288, rawbuf=0x62b0000f52a8 "ALTER TABLE t2 drop index idx1", length=30, parser_state=0x7ff1c0dbda20) at /10.6/src/sql/sql_parse.cc:8030
#17 0x00005604100d9671 in dispatch_command (command=COM_QUERY, thd=0x62b0000ee288, packet=0x6290000b4289 "ALTER TABLE t2 drop index idx1", packet_length=30, blocking=true) at /10.6/src/sql/sql_parse.cc:1896
#18 0x00005604100d6395 in do_command (thd=0x62b0000ee288, blocking=true) at /10.6/src/sql/sql_parse.cc:1404
#19 0x000056041053ce43 in do_handle_one_connection (connect=0x6110001838c8, put_in_cache=true) at /10.6/src/sql/sql_connect.cc:1418
#20 0x000056041053c6cf in handle_one_connection (arg=0x61100003c5c8) at /10.6/src/sql/sql_connect.cc:1312
#21 0x000056041125c2a9 in pfs_spawn_thread (arg=0x618000008508) at /10.6/src/storage/perfschema/pfs.cc:2201
#22 0x00007ff1d0095609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#23 0x00007ff1cfc68293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7ff1c1201700 (LWP 529266)):
#0  0x00007ff1cfc5baff in __GI___poll (fds=0x7ff1c12006f0, nfds=1, timeout=28800000) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007ff1d04b25ba in poll () from /lib/x86_64-linux-gnu/libasan.so.5
#2  0x0000560410ec5201 in vio_io_wait (vio=0x616002339e08, event=VIO_IO_EVENT_READ, timeout=28800000) at /10.6/src/vio/viosocket.c:948
#3  0x0000560410ec0ece in vio_socket_io_wait (vio=0x616002339e08, event=VIO_IO_EVENT_READ) at /10.6/src/vio/viosocket.c:116
#4  0x0000560410ec128e in vio_read (vio=0x616002339e08, buf=0x629001833288 "\a", size=4) at /10.6/src/vio/viosocket.c:182
#5  0x0000560410d2d513 in my_real_read (net=0x62b0000bd5a0, complen=0x7ff1c1200b00, header=1 '\001') at /10.6/src/sql/net_serv.cc:1003
#6  0x0000560410d2ef79 in my_net_read_packet_reallen (net=0x62b0000bd5a0, read_from_server=1 '\001', reallen=0x7ff1c1200ba0) at /10.6/src/sql/net_serv.cc:1284
#7  0x0000560410d2eddd in my_net_read_packet (net=0x62b0000bd5a0, read_from_server=1 '\001') at /10.6/src/sql/net_serv.cc:1268
#8  0x00005604100d550a in do_command (thd=0x62b0000bd288, blocking=true) at /10.6/src/sql/sql_parse.cc:1266
#9  0x000056041053ce43 in do_handle_one_connection (connect=0x6110000992c8, put_in_cache=true) at /10.6/src/sql/sql_connect.cc:1418
#10 0x000056041053c6cf in handle_one_connection (arg=0x61100003c348) at /10.6/src/sql/sql_connect.cc:1312
#11 0x000056041125c2a9 in pfs_spawn_thread (arg=0x618000008108) at /10.6/src/storage/perfschema/pfs.cc:2201
#12 0x00007ff1d0095609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#13 0x00007ff1cfc68293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7ff1c1313700 (LWP 529264)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5604144cf3e8 <COND_manager+40>) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x5604144cf308 <LOCK_manager+40>, cond=0x5604144cf3c0 <COND_manager>) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x5604144cf3c0 <COND_manager>, mutex=0x5604144cf308 <LOCK_manager+40>) at pthread_cond_wait.c:638
#3  0x0000560411ea5152 in safe_cond_wait (cond=0x5604144cf3c0 <COND_manager>, mp=0x5604144cf2e0 <LOCK_manager>, file=0x5604130d4860 "/10.6/src/mysys/my_thr_init.c", line=596) at /10.6/src/mysys/thr_mutex.c:492
#4  0x0000560411e92f1a in psi_cond_wait (that=0x5604144cf3c0 <COND_manager>, mutex=0x5604144cf2e0 <LOCK_manager>, file=0x5604121b7fc0 "/10.6/src/sql/sql_manager.cc", line=103) at /10.6/src/mysys/my_thr_init.c:596
#5  0x00005604100cc1c2 in inline_mysql_cond_wait (that=0x5604144cf3c0 <COND_manager>, mutex=0x5604144cf2e0 <LOCK_manager>, src_file=0x5604121b7fc0 "/10.6/src/sql/sql_manager.cc", src_line=103) at /10.6/src/include/mysql/psi/mysql_thread.h:1070
#6  0x00005604100cc85a in handle_manager (arg=0x0) at /10.6/src/sql/sql_manager.cc:103
#7  0x000056041125c2a9 in pfs_spawn_thread (arg=0x618000007d08) at /10.6/src/storage/perfschema/pfs.cc:2201
#8  0x00007ff1d0095609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007ff1cfc68293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7ff1c1415700 (LWP 529262)):
#0  0x00007ff1cfb8d322 in __GI___sigtimedwait (set=0x7ff1c1414cf0, info=0x7ff1c1414b20, timeout=0x0) at ../sysdeps/unix/sysv/linux/sigtimedwait.c:29
#1  0x00007ff1d04fd111 in ?? () from /lib/x86_64-linux-gnu/libasan.so.5
#2  0x000056040fdc1edc in my_sigwait (set=0x7ff1c1414cf0, sig=0x7ff1c1414c60, code=0x7ff1c1414c70) at /10.6/src/include/my_pthread.h:195
#3  0x000056040fdd0833 in signal_hand (arg=0x0) at /10.6/src/sql/mysqld.cc:3113
#4  0x000056041125c2a9 in pfs_spawn_thread (arg=0x618000005108) at /10.6/src/storage/perfschema/pfs.cc:2201
#5  0x00007ff1d0095609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007ff1cfc68293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7ff1c1c16700 (LWP 529261)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x000056041190e5cb in srw_mutex_impl<false>::wait (this=0x560414156c08 <dict_sys+72>, lk=2147483653) at /10.6/src/storage/innobase/sync/srw_lock.cc:348
#2  0x000056041190c47c in srw_mutex_impl<false>::wait_and_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/sync/srw_lock.cc:461
#3  0x00005604114cb60f in srw_mutex_impl<false>::wr_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/include/srw_lock.h:80
#4  0x000056041190d906 in ssux_lock_impl<false>::rd_wait (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/sync/srw_lock.cc:523
#5  0x00005604117e0a35 in ssux_lock_impl<false>::rd_lock (this=0x560414156c08 <dict_sys+72>) at /10.6/src/storage/innobase/include/srw_lock.h:214
#6  0x000056041190daeb in srw_lock_impl<false>::psi_rd_lock (this=0x560414156c00 <dict_sys+64>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=834) at /10.6/src/storage/innobase/sync/srw_lock.cc:581
#7  0x0000560411916fe7 in srw_lock_impl<false>::rd_lock (this=0x560414156c00 <dict_sys+64>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=834) at /10.6/src/storage/innobase/include/srw_lock.h:481
#8  0x0000560411aee95b in dict_sys_t::freeze (this=0x560414156bc0 <dict_sys>, file=0x560412f6db60 "/10.6/src/storage/innobase/dict/dict0dict.cc", line=834) at /10.6/src/storage/innobase/dict/dict0dict.cc:997
#9  0x0000560411aed4ce in dict_table_open_on_id (table_id=1734, dict_locked=false, table_op=DICT_TABLE_OP_NORMAL, thd=0x62b00002a288, mdl=0x61b000002cc0) at /10.6/src/storage/innobase/dict/dict0dict.cc:834
#10 0x000056041186c831 in row_purge_parse_undo_rec (node=0x61b000002b20, undo_rec=0x621000044da0 "", thr=0x6170000055d8, updated_extern=0x7ff1c1c15820) at /10.6/src/storage/innobase/row/row0purge.cc:1028
#11 0x000056041186e0e3 in row_purge (node=0x61b000002b20, undo_rec=0x621000044da0 "", thr=0x6170000055d8) at /10.6/src/storage/innobase/row/row0purge.cc:1206
#12 0x000056041186e531 in row_purge_step (thr=0x6170000055d8) at /10.6/src/storage/innobase/row/row0purge.cc:1258
#13 0x000056041174b36d in que_thr_step (thr=0x6170000055d8) at /10.6/src/storage/innobase/que/que0que.cc:653
#14 0x000056041174b715 in que_run_threads_low (thr=0x6170000055d8) at /10.6/src/storage/innobase/que/que0que.cc:709
#15 0x000056041174b8b7 in que_run_threads (thr=0x6170000055d8) at /10.6/src/storage/innobase/que/que0que.cc:729
#16 0x00005604118f0625 in srv_task_execute () at /10.6/src/storage/innobase/srv/srv0srv.cc:1716
#17 0x00005604118f11d5 in purge_worker_callback () at /10.6/src/storage/innobase/srv/srv0srv.cc:1959
#18 0x0000560411cd6952 in tpool::task_group::execute (this=0x560414df3f40 <purge_task_group>, t=0x560414df4000 <purge_worker_task>) at /10.6/src/tpool/task_group.cc:55
#19 0x0000560411cd721b in tpool::task::execute (this=0x560414df4000 <purge_worker_task>) at /10.6/src/tpool/task.cc:32
#20 0x0000560411cc39c9 in tpool::thread_pool_generic::worker_main (this=0x618000001080, thread_var=0x63000002fc00) at /10.6/src/tpool/tpool_generic.cc:549
#21 0x0000560411cd63b3 in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x604000004028: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x560411cc37e6 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x604000004020: 0x618000001080) at /usr/include/c++/9/bits/invoke.h:73
#22 0x0000560411cd615e in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x604000004028: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x560411cc37e6 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#23 0x0000560411cd5fef in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000004018) at /usr/include/c++/9/thread:244
#24 0x0000560411cd5f39 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000004018) at /usr/include/c++/9/thread:251
#25 0x0000560411cd5e9e in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000004010) at /usr/include/c++/9/thread:195
#26 0x00007ff1cff7ade4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#27 0x00007ff1d0095609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#28 0x00007ff1cfc68293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7ff1c551f700 (LWP 529257)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x56041410e5a8 <buf_pool+17576>) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x56041410e4a8 <buf_pool+17320>, cond=0x56041410e580 <buf_pool+17536>) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x56041410e580 <buf_pool+17536>, mutex=0x56041410e4a8 <buf_pool+17320>) at pthread_cond_wait.c:638
#3  0x0000560411ea5152 in safe_cond_wait (cond=0x56041410e580 <buf_pool+17536>, mp=0x56041410e480 <buf_pool+17280>, file=0x560412f2e300 "/10.6/src/storage/innobase/buf/buf0flu.cc", line=2206) at /10.6/src/mysys/thr_mutex.c:492
#4  0x0000560411aab910 in buf_flush_page_cleaner () at /10.6/src/storage/innobase/buf/buf0flu.cc:2206
#5  0x0000560411ab132a in std::__invoke_impl<void, void (*)()> (__f=@0x602000000078: 0x560411aab23e <buf_flush_page_cleaner()>) at /usr/include/c++/9/bits/invoke.h:60
#6  0x0000560411ab1266 in std::__invoke<void (*)()> (__fn=@0x602000000078: 0x560411aab23e <buf_flush_page_cleaner()>) at /usr/include/c++/9/bits/invoke.h:95
#7  0x0000560411ab118c in std::thread::_Invoker<std::tuple<void (*)()> >::_M_invoke<0ul> (this=0x602000000078) at /usr/include/c++/9/thread:244
#8  0x0000560411ab110d in std::thread::_Invoker<std::tuple<void (*)()> >::operator() (this=0x602000000078) at /usr/include/c++/9/thread:251
#9  0x0000560411ab1072 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (*)()> > >::_M_run (this=0x602000000070) at /usr/include/c++/9/thread:195
#10 0x00007ff1cff7ade4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#11 0x00007ff1d0095609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#12 0x00007ff1cfc68293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7ff1c699c700 (LWP 529256)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x0000560411cd810c in my_getevents (ctx=0x7ff1c699d000, min_nr=1, nr=256, ev=0x7ff1c6999b10) at /10.6/src/tpool/aio_linux.cc:62
#2  0x0000560411cd870f in tpool::aio_linux::getevent_thread_routine (aio=0x6030000003a0) at /10.6/src/tpool/aio_linux.cc:104
#3  0x0000560411cd9eeb in std::__invoke_impl<void, void (*)(tpool::aio_linux*), tpool::aio_linux*> (__f=@0x6030000003e0: 0x560411cd85be <tpool::aio_linux::getevent_thread_routine(tpool::aio_linux*)>) at /usr/include/c++/9/bits/invoke.h:60
#4  0x0000560411cd9dbe in std::__invoke<void (*)(tpool::aio_linux*), tpool::aio_linux*> (__fn=@0x6030000003e0: 0x560411cd85be <tpool::aio_linux::getevent_thread_routine(tpool::aio_linux*)>) at /usr/include/c++/9/bits/invoke.h:95
#5  0x0000560411cd9c9b in std::thread::_Invoker<std::tuple<void (*)(tpool::aio_linux*), tpool::aio_linux*> >::_M_invoke<0ul, 1ul> (this=0x6030000003d8) at /usr/include/c++/9/thread:244
#6  0x0000560411cd9c01 in std::thread::_Invoker<std::tuple<void (*)(tpool::aio_linux*), tpool::aio_linux*> >::operator() (this=0x6030000003d8) at /usr/include/c++/9/thread:251
#7  0x0000560411cd9b66 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (*)(tpool::aio_linux*), tpool::aio_linux*> > >::_M_run (this=0x6030000003d0) at /usr/include/c++/9/thread:195
#8  0x00007ff1cff7ade4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#9  0x00007ff1d0095609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007ff1cfc68293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7ff1c75c7700 (LWP 529255)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7ff1c75c6c40, clockid=<optimized out>, expected=0, futex_word=0x560414d330c8 <COND_checkpoint+40>) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7ff1c75c6c40, clockid=<optimized out>, mutex=0x560414d32fe8 <LOCK_checkpoint+40>, cond=0x560414d330a0 <COND_checkpoint>) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x560414d330a0 <COND_checkpoint>, mutex=0x560414d32fe8 <LOCK_checkpoint+40>, abstime=0x7ff1c75c6c40) at pthread_cond_wait.c:656
#3  0x0000560411ea5a8b in safe_cond_timedwait (cond=0x560414d330a0 <COND_checkpoint>, mp=0x560414d32fc0 <LOCK_checkpoint>, abstime=0x7ff1c75c6c40, file=0x5604130d4860 "/10.6/src/mysys/my_thr_init.c", line=609) at /10.6/src/mysys/thr_mutex.c:546
#4  0x0000560411e931eb in psi_cond_timedwait (that=0x560414d330a0 <COND_checkpoint>, mutex=0x560414d32fc0 <LOCK_checkpoint>, abstime=0x7ff1c75c6c40, file=0x560412907860 "/10.6/src/storage/maria/ma_servicethread.c", line=115) at /10.6/src/mysys/my_thr_init.c:609
#5  0x0000560411064d7a in inline_mysql_cond_timedwait (that=0x560414d330a0 <COND_checkpoint>, mutex=0x560414d32fc0 <LOCK_checkpoint>, abstime=0x7ff1c75c6c40, src_file=0x560412907860 "/10.6/src/storage/maria/ma_servicethread.c", src_line=115) at /10.6/src/include/mysql/psi/mysql_thread.h:1086
#6  0x0000560411065b3f in my_service_thread_sleep (control=0x560413c91800 <checkpoint_control>, sleep_time=30000000000) at /10.6/src/storage/maria/ma_servicethread.c:115
#7  0x0000560411047cbc in ma_checkpoint_background (arg=0x1e) at /10.6/src/storage/maria/ma_checkpoint.c:725
#8  0x000056041125c2a9 in pfs_spawn_thread (arg=0x618000000d08) at /10.6/src/storage/perfschema/pfs.cc:2201
#9  0x00007ff1d0095609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007ff1cfc68293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7ff1c84e8700 (LWP 529254)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7ff1c84e7d90, clockid=<optimized out>, expected=0, futex_word=0x560414e121ec <COND_timer+44>) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7ff1c84e7d90, clockid=<optimized out>, mutex=0x560414e12108 <LOCK_timer+40>, cond=0x560414e121c0 <COND_timer>) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x560414e121c0 <COND_timer>, mutex=0x560414e12108 <LOCK_timer+40>, abstime=0x7ff1c84e7d90) at pthread_cond_wait.c:656
#3  0x0000560411ea5a8b in safe_cond_timedwait (cond=0x560414e121c0 <COND_timer>, mp=0x560414e120e0 <LOCK_timer>, abstime=0x7ff1c84e7d90, file=0x5604130d4860 "/10.6/src/mysys/my_thr_init.c", line=609) at /10.6/src/mysys/thr_mutex.c:546
#4  0x0000560411e931eb in psi_cond_timedwait (that=0x560414e121c0 <COND_timer>, mutex=0x560414e120e0 <LOCK_timer>, abstime=0x7ff1c84e7d90, file=0x5604130d7fa0 "/10.6/src/mysys/thr_timer.c", line=321) at /10.6/src/mysys/my_thr_init.c:609
#5  0x0000560411ea8511 in inline_mysql_cond_timedwait (that=0x560414e121c0 <COND_timer>, mutex=0x560414e120e0 <LOCK_timer>, abstime=0x7ff1c84e7d90, src_file=0x5604130d7fa0 "/10.6/src/mysys/thr_timer.c", src_line=321) at /10.6/src/include/mysql/psi/mysql_thread.h:1086
#6  0x0000560411eaa6f1 in timer_handler (arg=0x0) at /10.6/src/mysys/thr_timer.c:321
#7  0x000056041125c2a9 in pfs_spawn_thread (arg=0x618000000108) at /10.6/src/storage/perfschema/pfs.cc:2201
#8  0x00007ff1d0095609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007ff1cfc68293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7ff1cfb36800 (LWP 529253)):
#0  0x00007ff1cfc5baff in __GI___poll (fds=0x61200001bfc8, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007ff1d04b25ba in poll () from /lib/x86_64-linux-gnu/libasan.so.5
#2  0x000056040fddb275 in handle_connections_sockets () at /10.6/src/sql/mysqld.cc:6115
#3  0x000056040fdd9a47 in mysqld_main (argc=155, argv=0x61b000001668) at /10.6/src/sql/mysqld.cc:5820
#4  0x000056040fdc1d5d in main (argc=23, argv=0x7ffdcfb453d8) at /10.6/src/sql/main.cc:34
[Inferior 1 (process 529253) detached]





----------------------------------



##10.7





[New LWP 531799]
[New LWP 531800]
[New LWP 531801]
[New LWP 531802]
[New LWP 531803]
[New LWP 531807]
[New LWP 531808]
[New LWP 531811]
[New LWP 531815]
[New LWP 532032]
[New LWP 532034]
[New LWP 532036]
[New LWP 532457]
[New LWP 532462]
[New LWP 532463]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007fec0baa6aff in __GI___poll (fds=0x60e0000064f8, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
29	../sysdeps/unix/sysv/linux/poll.c: No such file or directory.

Thread 16 (Thread 0x7febf3f35700 (LWP 532463)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x000055d7d9ca1487 in srw_mutex_impl<false>::wait (this=0x55d7dc537148 <dict_sys+72>, lk=2147483653) at /git/10.7/storage/innobase/sync/srw_lock.cc:348
#2  0x000055d7d9c9f338 in srw_mutex_impl<false>::wait_and_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/sync/srw_lock.cc:461
#3  0x000055d7d985396d in srw_mutex_impl<false>::wr_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/include/srw_lock.h:80
#4  0x000055d7d9ca07c2 in ssux_lock_impl<false>::rd_wait (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/sync/srw_lock.cc:523
#5  0x000055d7d9b6dfb9 in ssux_lock_impl<false>::rd_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/include/srw_lock.h:214
#6  0x000055d7d9ca09a7 in srw_lock_impl<false>::psi_rd_lock (this=0x55d7dc537140 <dict_sys+64>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=834) at /git/10.7/storage/innobase/sync/srw_lock.cc:581
#7  0x000055d7d9ca9e9d in srw_lock_impl<false>::rd_lock (this=0x55d7dc537140 <dict_sys+64>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=834) at /git/10.7/storage/innobase/include/srw_lock.h:481
#8  0x000055d7d9e83877 in dict_sys_t::freeze (this=0x55d7dc537100 <dict_sys>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=834) at /git/10.7/storage/innobase/dict/dict0dict.cc:997
#9  0x000055d7d9e823ea in dict_table_open_on_id (table_id=2, dict_locked=false, table_op=DICT_TABLE_OP_NORMAL, thd=0x62b000093218, mdl=0x61b000002180) at /git/10.7/storage/innobase/dict/dict0dict.cc:834
#10 0x000055d7d9bfe7bf in row_purge_parse_undo_rec (node=0x61b000001fe0, undo_rec=0x621000035db8 "", thr=0x61b000001f38, updated_extern=0x7febf3f34820) at /git/10.7/storage/innobase/row/row0purge.cc:1028
#11 0x000055d7d9c00071 in row_purge (node=0x61b000001fe0, undo_rec=0x621000035db8 "", thr=0x61b000001f38) at /git/10.7/storage/innobase/row/row0purge.cc:1206
#12 0x000055d7d9c004bf in row_purge_step (thr=0x61b000001f38) at /git/10.7/storage/innobase/row/row0purge.cc:1258
#13 0x000055d7d9ad71d3 in que_thr_step (thr=0x61b000001f38) at /git/10.7/storage/innobase/que/que0que.cc:653
#14 0x000055d7d9ad757b in que_run_threads_low (thr=0x61b000001f38) at /git/10.7/storage/innobase/que/que0que.cc:709
#15 0x000055d7d9ad771d in que_run_threads (thr=0x61b000001f38) at /git/10.7/storage/innobase/que/que0que.cc:729
#16 0x000055d7d9c82f99 in srv_task_execute () at /git/10.7/storage/innobase/srv/srv0srv.cc:1716
#17 0x000055d7d9c83c21 in purge_worker_callback () at /git/10.7/storage/innobase/srv/srv0srv.cc:1960
#18 0x000055d7da06e8b0 in tpool::task_group::execute (this=0x55d7dd1eb440 <purge_task_group>, t=0x55d7dd1eb500 <purge_worker_task>) at /git/10.7/tpool/task_group.cc:55
#19 0x000055d7da06f179 in tpool::task::execute (this=0x55d7dd1eb500 <purge_worker_task>) at /git/10.7/tpool/task.cc:32
#20 0x000055d7da05b927 in tpool::thread_pool_generic::worker_main (this=0x618000000c80, thread_var=0x63000002fb00) at /git/10.7/tpool/tpool_generic.cc:549
#21 0x000055d7da06e311 in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x6040000046e8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55d7da05b744 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x6040000046e0: 0x618000000c80) at /usr/include/c++/9/bits/invoke.h:73
#22 0x000055d7da06e0bc in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x6040000046e8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55d7da05b744 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#23 0x000055d7da06df4d in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x6040000046d8) at /usr/include/c++/9/thread:244
#24 0x000055d7da06de97 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x6040000046d8) at /usr/include/c++/9/thread:251
#25 0x000055d7da06ddfc in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x6040000046d0) at /usr/include/c++/9/thread:195
#26 0x00007fec0bdc5de4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#27 0x00007fec0bee0609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#28 0x00007fec0bab3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7febf4736700 (LWP 532462)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x000055d7d9ca1487 in srw_mutex_impl<false>::wait (this=0x55d7dc537148 <dict_sys+72>, lk=2147483652) at /git/10.7/storage/innobase/sync/srw_lock.cc:348
#2  0x000055d7d9c9f338 in srw_mutex_impl<false>::wait_and_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/sync/srw_lock.cc:461
#3  0x000055d7d985396d in srw_mutex_impl<false>::wr_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/include/srw_lock.h:80
#4  0x000055d7d9ca07c2 in ssux_lock_impl<false>::rd_wait (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/sync/srw_lock.cc:523
#5  0x000055d7d9b6dfb9 in ssux_lock_impl<false>::rd_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/include/srw_lock.h:214
#6  0x000055d7d9ca09a7 in srw_lock_impl<false>::psi_rd_lock (this=0x55d7dc537140 <dict_sys+64>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=834) at /git/10.7/storage/innobase/sync/srw_lock.cc:581
#7  0x000055d7d9ca9e9d in srw_lock_impl<false>::rd_lock (this=0x55d7dc537140 <dict_sys+64>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=834) at /git/10.7/storage/innobase/include/srw_lock.h:481
#8  0x000055d7d9e83877 in dict_sys_t::freeze (this=0x55d7dc537100 <dict_sys>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=834) at /git/10.7/storage/innobase/dict/dict0dict.cc:997
#9  0x000055d7d9e823ea in dict_table_open_on_id (table_id=4, dict_locked=false, table_op=DICT_TABLE_OP_NORMAL, thd=0x62b00007e218, mdl=0x61f000001428) at /git/10.7/storage/innobase/dict/dict0dict.cc:834
#10 0x000055d7d9bfe7bf in row_purge_parse_undo_rec (node=0x61f000001288, undo_rec=0x621000035ea0 "", thr=0x61f0000011e0, updated_extern=0x7febf47356b0) at /git/10.7/storage/innobase/row/row0purge.cc:1028
#11 0x000055d7d9c00071 in row_purge (node=0x61f000001288, undo_rec=0x621000035ea0 "", thr=0x61f0000011e0) at /git/10.7/storage/innobase/row/row0purge.cc:1206
#12 0x000055d7d9c004bf in row_purge_step (thr=0x61f0000011e0) at /git/10.7/storage/innobase/row/row0purge.cc:1258
#13 0x000055d7d9ad71d3 in que_thr_step (thr=0x61f0000011e0) at /git/10.7/storage/innobase/que/que0que.cc:653
#14 0x000055d7d9ad757b in que_run_threads_low (thr=0x61f0000011e0) at /git/10.7/storage/innobase/que/que0que.cc:709
#15 0x000055d7d9ad771d in que_run_threads (thr=0x61f0000011e0) at /git/10.7/storage/innobase/que/que0que.cc:729
#16 0x000055d7d9cb70c5 in trx_purge (n_tasks=4, truncate=false) at /git/10.7/storage/innobase/trx/trx0purge.cc:1299
#17 0x000055d7d9c86277 in purge_coordinator_state::do_purge (this=0x55d7dd1eb140 <purge_state>) at /git/10.7/storage/innobase/srv/srv0srv.cc:1815
#18 0x000055d7d9c83dea in purge_coordinator_callback () at /git/10.7/storage/innobase/srv/srv0srv.cc:1969
#19 0x000055d7da06e8b0 in tpool::task_group::execute (this=0x55d7dd1eb5c0 <purge_coordinator_task_group>, t=0x55d7dd1eb680 <purge_coordinator_task>) at /git/10.7/tpool/task_group.cc:55
#20 0x000055d7da06f179 in tpool::task::execute (this=0x55d7dd1eb680 <purge_coordinator_task>) at /git/10.7/tpool/task.cc:32
#21 0x000055d7da05b927 in tpool::thread_pool_generic::worker_main (this=0x618000000c80, thread_var=0x63000002f700) at /git/10.7/tpool/tpool_generic.cc:549
#22 0x000055d7da06e311 in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x6040000046a8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55d7da05b744 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x6040000046a0: 0x618000000c80) at /usr/include/c++/9/bits/invoke.h:73
#23 0x000055d7da06e0bc in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x6040000046a8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55d7da05b744 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#24 0x000055d7da06df4d in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000004698) at /usr/include/c++/9/thread:244
#25 0x000055d7da06de97 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000004698) at /usr/include/c++/9/thread:251
#26 0x000055d7da06ddfc in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000004690) at /usr/include/c++/9/thread:195
#27 0x00007fec0bdc5de4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#28 0x00007fec0bee0609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#29 0x00007fec0bab3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7febf6c05700 (LWP 532457)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7febf6c04810, clockid=<optimized out>, expected=0, futex_word=0x63000002f6ac) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7febf6c04810, clockid=<optimized out>, mutex=0x618000000d90, cond=0x63000002f680) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x63000002f680, mutex=0x618000000d90, abstime=0x7febf6c04810) at pthread_cond_wait.c:656
#3  0x000055d7da05ea4d in __gthread_cond_timedwait (__cond=0x63000002f680, __mutex=0x618000000d90, __abs_timeout=0x7febf6c04810) at /usr/include/x86_64-linux-gnu/c++/9/bits/gthr-default.h:872
#4  0x000055d7da0668a5 in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000002f680, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:188
#5  0x000055d7da064295 in std::condition_variable::wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x63000002f680, __lock=..., __atime=...) at /usr/include/c++/9/condition_variable:121
#6  0x000055d7da0616c1 in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x63000002f680, __lock=..., __rtime=...) at /usr/include/c++/9/condition_variable:152
#7  0x000055d7da05adc8 in tpool::thread_pool_generic::wait_for_tasks (this=0x618000000c80, lk=..., thread_data=0x63000002f680) at /git/10.7/tpool/tpool_generic.cc:449
#8  0x000055d7da05b226 in tpool::thread_pool_generic::get_task (this=0x618000000c80, thread_var=0x63000002f680, t=0x7febf6c04bc0) at /git/10.7/tpool/tpool_generic.cc:502
#9  0x000055d7da05b866 in tpool::thread_pool_generic::worker_main (this=0x618000000c80, thread_var=0x63000002f680) at /git/10.7/tpool/tpool_generic.cc:547
#10 0x000055d7da06e311 in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x604000004568: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55d7da05b744 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x604000004560: 0x618000000c80) at /usr/include/c++/9/bits/invoke.h:73
#11 0x000055d7da06e0bc in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x604000004568: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55d7da05b744 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#12 0x000055d7da06df4d in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000004558) at /usr/include/c++/9/thread:244
#13 0x000055d7da06de97 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000004558) at /usr/include/c++/9/thread:251
#14 0x000055d7da06ddfc in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000004550) at /usr/include/c++/9/thread:195
#15 0x00007fec0bdc5de4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#16 0x00007fec0bee0609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#17 0x00007fec0bab3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7febf844a700 (LWP 532036)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x000055d7d9ca1487 in srw_mutex_impl<false>::wait (this=0x55d7dc537148 <dict_sys+72>, lk=2147483654) at /git/10.7/storage/innobase/sync/srw_lock.cc:348
#2  0x000055d7d9c9f338 in srw_mutex_impl<false>::wait_and_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/sync/srw_lock.cc:461
#3  0x000055d7d985396d in srw_mutex_impl<false>::wr_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/include/srw_lock.h:80
#4  0x000055d7d9ca07c2 in ssux_lock_impl<false>::rd_wait (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/sync/srw_lock.cc:523
#5  0x000055d7d9b6dfb9 in ssux_lock_impl<false>::rd_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/include/srw_lock.h:214
#6  0x000055d7d9ca09a7 in srw_lock_impl<false>::psi_rd_lock (this=0x55d7dc537140 <dict_sys+64>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=834) at /git/10.7/storage/innobase/sync/srw_lock.cc:581
#7  0x000055d7d9ca9e9d in srw_lock_impl<false>::rd_lock (this=0x55d7dc537140 <dict_sys+64>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=834) at /git/10.7/storage/innobase/include/srw_lock.h:481
#8  0x000055d7d9e83877 in dict_sys_t::freeze (this=0x55d7dc537100 <dict_sys>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=834) at /git/10.7/storage/innobase/dict/dict0dict.cc:997
#9  0x000055d7d9e823ea in dict_table_open_on_id (table_id=1, dict_locked=false, table_op=DICT_TABLE_OP_NORMAL, thd=0x62b000054218, mdl=0x61b000001ec0) at /git/10.7/storage/innobase/dict/dict0dict.cc:834
#10 0x000055d7d9bfe7bf in row_purge_parse_undo_rec (node=0x61b000001d20, undo_rec=0x621000035da0 "", thr=0x617000001358, updated_extern=0x7febf8449820) at /git/10.7/storage/innobase/row/row0purge.cc:1028
#11 0x000055d7d9c00071 in row_purge (node=0x61b000001d20, undo_rec=0x621000035da0 "", thr=0x617000001358) at /git/10.7/storage/innobase/row/row0purge.cc:1206
#12 0x000055d7d9c004bf in row_purge_step (thr=0x617000001358) at /git/10.7/storage/innobase/row/row0purge.cc:1258
#13 0x000055d7d9ad71d3 in que_thr_step (thr=0x617000001358) at /git/10.7/storage/innobase/que/que0que.cc:653
#14 0x000055d7d9ad757b in que_run_threads_low (thr=0x617000001358) at /git/10.7/storage/innobase/que/que0que.cc:709
#15 0x000055d7d9ad771d in que_run_threads (thr=0x617000001358) at /git/10.7/storage/innobase/que/que0que.cc:729
#16 0x000055d7d9c82f99 in srv_task_execute () at /git/10.7/storage/innobase/srv/srv0srv.cc:1716
#17 0x000055d7d9c83c21 in purge_worker_callback () at /git/10.7/storage/innobase/srv/srv0srv.cc:1960
#18 0x000055d7da06e8b0 in tpool::task_group::execute (this=0x55d7dd1eb440 <purge_task_group>, t=0x55d7dd1eb500 <purge_worker_task>) at /git/10.7/tpool/task_group.cc:55
#19 0x000055d7da06f179 in tpool::task::execute (this=0x55d7dd1eb500 <purge_worker_task>) at /git/10.7/tpool/task.cc:32
#20 0x000055d7da05b927 in tpool::thread_pool_generic::worker_main (this=0x618000000c80, thread_var=0x63000002f800) at /git/10.7/tpool/tpool_generic.cc:549
#21 0x000055d7da06e311 in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x6040000044e8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55d7da05b744 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x6040000044e0: 0x618000000c80) at /usr/include/c++/9/bits/invoke.h:73
#22 0x000055d7da06e0bc in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x6040000044e8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55d7da05b744 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#23 0x000055d7da06df4d in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x6040000044d8) at /usr/include/c++/9/thread:244
#24 0x000055d7da06de97 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x6040000044d8) at /usr/include/c++/9/thread:251
#25 0x000055d7da06ddfc in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x6040000044d0) at /usr/include/c++/9/thread:195
#26 0x00007fec0bdc5de4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#27 0x00007fec0bee0609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#28 0x00007fec0bab3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7febfe5e0700 (LWP 532034)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x000055d7d9ca1487 in srw_mutex_impl<false>::wait (this=0x55d7dc537148 <dict_sys+72>, lk=2147483655) at /git/10.7/storage/innobase/sync/srw_lock.cc:348
#2  0x000055d7d9c9f338 in srw_mutex_impl<false>::wait_and_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/sync/srw_lock.cc:461
#3  0x000055d7d985396d in srw_mutex_impl<false>::wr_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/include/srw_lock.h:80
#4  0x000055d7d9ca07c2 in ssux_lock_impl<false>::rd_wait (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/sync/srw_lock.cc:523
#5  0x000055d7d9b6dfb9 in ssux_lock_impl<false>::rd_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/include/srw_lock.h:214
#6  0x000055d7d9ca09a7 in srw_lock_impl<false>::psi_rd_lock (this=0x55d7dc537140 <dict_sys+64>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=834) at /git/10.7/storage/innobase/sync/srw_lock.cc:581
#7  0x000055d7d9ca9e9d in srw_lock_impl<false>::rd_lock (this=0x55d7dc537140 <dict_sys+64>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=834) at /git/10.7/storage/innobase/include/srw_lock.h:481
#8  0x000055d7d9e83877 in dict_sys_t::freeze (this=0x55d7dc537100 <dict_sys>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=834) at /git/10.7/storage/innobase/dict/dict0dict.cc:997
#9  0x000055d7d9e823ea in dict_table_open_on_id (table_id=3, dict_locked=false, table_op=DICT_TABLE_OP_NORMAL, thd=0x62b000070218, mdl=0x61f000001168) at /git/10.7/storage/innobase/dict/dict0dict.cc:834
#10 0x000055d7d9bfe7bf in row_purge_parse_undo_rec (node=0x61f000000fc8, undo_rec=0x621000035df8 "", thr=0x61f000000f20, updated_extern=0x7febfe5df820) at /git/10.7/storage/innobase/row/row0purge.cc:1028
#11 0x000055d7d9c00071 in row_purge (node=0x61f000000fc8, undo_rec=0x621000035df8 "", thr=0x61f000000f20) at /git/10.7/storage/innobase/row/row0purge.cc:1206
#12 0x000055d7d9c004bf in row_purge_step (thr=0x61f000000f20) at /git/10.7/storage/innobase/row/row0purge.cc:1258
#13 0x000055d7d9ad71d3 in que_thr_step (thr=0x61f000000f20) at /git/10.7/storage/innobase/que/que0que.cc:653
#14 0x000055d7d9ad757b in que_run_threads_low (thr=0x61f000000f20) at /git/10.7/storage/innobase/que/que0que.cc:709
#15 0x000055d7d9ad771d in que_run_threads (thr=0x61f000000f20) at /git/10.7/storage/innobase/que/que0que.cc:729
#16 0x000055d7d9c82f99 in srv_task_execute () at /git/10.7/storage/innobase/srv/srv0srv.cc:1716
#17 0x000055d7d9c83c21 in purge_worker_callback () at /git/10.7/storage/innobase/srv/srv0srv.cc:1960
#18 0x000055d7da06e8b0 in tpool::task_group::execute (this=0x55d7dd1eb440 <purge_task_group>, t=0x55d7dd1eb500 <purge_worker_task>) at /git/10.7/tpool/task_group.cc:55
#19 0x000055d7da06f179 in tpool::task::execute (this=0x55d7dd1eb500 <purge_worker_task>) at /git/10.7/tpool/task.cc:32
#20 0x000055d7da05b927 in tpool::thread_pool_generic::worker_main (this=0x618000000c80, thread_var=0x63000002fc00) at /git/10.7/tpool/tpool_generic.cc:549
#21 0x000055d7da06e311 in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x604000004468: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55d7da05b744 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x604000004460: 0x618000000c80) at /usr/include/c++/9/bits/invoke.h:73
#22 0x000055d7da06e0bc in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x604000004468: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55d7da05b744 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#23 0x000055d7da06df4d in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000004458) at /usr/include/c++/9/thread:244
#24 0x000055d7da06de97 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000004458) at /usr/include/c++/9/thread:251
#25 0x000055d7da06ddfc in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000004450) at /usr/include/c++/9/thread:195
#26 0x00007fec0bdc5de4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#27 0x00007fec0bee0609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#28 0x00007fec0bab3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7febfacbd700 (LWP 532032)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x000055d7d9ca1487 in srw_mutex_impl<false>::wait (this=0x55d7dc537148 <dict_sys+72>, lk=2147483650) at /git/10.7/storage/innobase/sync/srw_lock.cc:348
#2  0x000055d7d9c9f338 in srw_mutex_impl<false>::wait_and_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/sync/srw_lock.cc:461
#3  0x000055d7d985396d in srw_mutex_impl<false>::wr_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/include/srw_lock.h:80
#4  0x000055d7d9ca07c2 in ssux_lock_impl<false>::rd_wait (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/sync/srw_lock.cc:523
#5  0x000055d7d9b6dfb9 in ssux_lock_impl<false>::rd_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/include/srw_lock.h:214
#6  0x000055d7d9ca09a7 in srw_lock_impl<false>::psi_rd_lock (this=0x55d7dc537140 <dict_sys+64>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=619) at /git/10.7/storage/innobase/sync/srw_lock.cc:581
#7  0x000055d7d9ca9e9d in srw_lock_impl<false>::rd_lock (this=0x55d7dc537140 <dict_sys+64>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=619) at /git/10.7/storage/innobase/include/srw_lock.h:481
#8  0x000055d7d9e83877 in dict_sys_t::freeze (this=0x55d7dc537100 <dict_sys>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=619) at /git/10.7/storage/innobase/dict/dict0dict.cc:997
#9  0x000055d7d9e9f19a in dict_table_t::parse_name<false> (this=0x6180001ae920, db_name=..., tbl_name=..., db_name_len=0x7febfacbc040, tbl_name_len=0x7febfacbc060) at /git/10.7/storage/innobase/dict/dict0dict.cc:619
#10 0x000055d7d9ea0fc9 in dict_acquire_mdl_shared<true> (table=0x6180001ae920, thd=0x62b00001c218, mdl=0x7febfacbc780, table_op=DICT_TABLE_OP_NORMAL) at /git/10.7/storage/innobase/dict/dict0dict.cc:784
#11 0x000055d7d9fc196f in fts_optimize_sync_table (table=0x6180001ae920, process_message=true) at /git/10.7/storage/innobase/fts/fts0opt.cc:2784
#12 0x000055d7d9fc2384 in fts_optimize_callback () at /git/10.7/storage/innobase/fts/fts0opt.cc:2892
#13 0x000055d7da06e8b0 in tpool::task_group::execute (this=0x55d7dd1fc1c0 <task_group>, t=0x55d7dd1fc280 <task>) at /git/10.7/tpool/task_group.cc:55
#14 0x000055d7da06f179 in tpool::task::execute (this=0x55d7dd1fc280 <task>) at /git/10.7/tpool/task.cc:32
#15 0x000055d7da05b927 in tpool::thread_pool_generic::worker_main (this=0x618000000c80, thread_var=0x63000002fd00) at /git/10.7/tpool/tpool_generic.cc:549
#16 0x000055d7da06e311 in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x6040000043e8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55d7da05b744 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x6040000043e0: 0x618000000c80) at /usr/include/c++/9/bits/invoke.h:73
#17 0x000055d7da06e0bc in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x6040000043e8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55d7da05b744 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#18 0x000055d7da06df4d in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x6040000043d8) at /usr/include/c++/9/thread:244
#19 0x000055d7da06de97 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x6040000043d8) at /usr/include/c++/9/thread:251
#20 0x000055d7da06ddfc in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x6040000043d0) at /usr/include/c++/9/thread:195
#21 0x00007fec0bdc5de4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#22 0x00007fec0bee0609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#23 0x00007fec0bab3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7febfcbed700 (LWP 531815)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x000055d7d9ca1487 in srw_mutex_impl<false>::wait (this=0x55d7dc537148 <dict_sys+72>, lk=2147483651) at /git/10.7/storage/innobase/sync/srw_lock.cc:348
#2  0x000055d7d9c9f338 in srw_mutex_impl<false>::wait_and_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/sync/srw_lock.cc:461
#3  0x000055d7d985396d in srw_mutex_impl<false>::wr_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/include/srw_lock.h:80
#4  0x000055d7d9849bfa in ssux_lock_impl<false>::wr_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/include/srw_lock.h:224
#5  0x000055d7d9ca0c67 in srw_lock_impl<false>::psi_wr_lock (this=0x55d7dc537140 <dict_sys+64>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=4272) at /git/10.7/storage/innobase/sync/srw_lock.cc:598
#6  0x000055d7d9a44827 in srw_lock_impl<false>::wr_lock (this=0x55d7dc537140 <dict_sys+64>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=4272) at /git/10.7/storage/innobase/include/srw_lock.h:494
#7  0x000055d7d9e83388 in dict_sys_t::lock_wait (this=0x55d7dc537100 <dict_sys>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=4272) at /git/10.7/storage/innobase/dict/dict0dict.cc:980
#8  0x000055d7d983ce5e in dict_sys_t::lock (this=0x55d7dc537100 <dict_sys>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=4272) at /git/10.7/storage/innobase/include/dict0dict.h:1568
#9  0x000055d7d9e9a129 in dict_index_set_merge_threshold (index=0x6160066ac620, merge_threshold=50) at /git/10.7/storage/innobase/dict/dict0dict.cc:4272
#10 0x000055d7d9803a98 in innobase_parse_hint_from_comment (thd=0x62b00019d218, table=0x6180001b1d20, table_share=0x7febfcbe8890) at /git/10.7/storage/innobase/handler/ha_innodb.cc:11819
#11 0x000055d7d98bac9e in ha_innobase::commit_inplace_alter_table (this=0x61d0008c3cb0, altered_table=0x7febfcbe8050, ha_alter_info=0x7febfcbe7950, commit=true) at /git/10.7/storage/innobase/handler/handler0alter.cc:11296
#12 0x000055d7d8d76928 in handler::ha_commit_inplace_alter_table (this=0x61d0008c3cb0, altered_table=0x7febfcbe8050, ha_alter_info=0x7febfcbe7950, commit=true) at /git/10.7/sql/handler.cc:5191
#13 0x000055d7d878d12c in mysql_inplace_alter_table (thd=0x62b00019d218, table_list=0x61c0003260b0, table=0x619000227498, altered_table=0x7febfcbe8050, ha_alter_info=0x7febfcbe7950, target_mdl_request=0x7febfcbe7a50, ddl_log_state=0x7febfcbe7730, trigger_param=0x7febfcbe8470, alter_ctx=0x7febfcbe8eb0) at /git/10.7/sql/sql_table.cc:7556
#14 0x000055d7d87a21eb in mysql_alter_table (thd=0x62b00019d218, new_db=0x62b0001a1eb8, new_name=0x62b0001a22d0, create_info=0x7febfcbea3a0, table_list=0x61c0003260b0, alter_info=0x7febfcbea270, order_num=0, order=0x0, ignore=false, if_exists=false) at /git/10.7/sql/sql_table.cc:10341
#15 0x000055d7d8960223 in Sql_cmd_alter_table::execute (this=0x607000078b70, thd=0x62b00019d218) at /git/10.7/sql/sql_alter.cc:540
#16 0x000055d7d84c1886 in mysql_execute_command (thd=0x62b00019d218, is_called_from_prepared_stmt=false) at /git/10.7/sql/sql_parse.cc:5989
#17 0x000055d7d84cf0ab in mysql_parse (thd=0x62b00019d218, rawbuf=0x60f000094450 "ALTER TABLE t2 drop index idx1", length=30, parser_state=0x7febfcbeba20) at /git/10.7/sql/sql_parse.cc:8028
#18 0x000055d7d84a51ba in dispatch_command (command=COM_QUERY, thd=0x62b00019d218, packet=0x629001b44219 "ALTER TABLE t2 drop index idx1", packet_length=30, blocking=true) at /git/10.7/sql/sql_parse.cc:1894
#19 0x000055d7d84a1ede in do_command (thd=0x62b00019d218, blocking=true) at /git/10.7/sql/sql_parse.cc:1402
#20 0x000055d7d894245b in do_handle_one_connection (connect=0x6080001dc9b8, put_in_cache=true) at /git/10.7/sql/sql_connect.cc:1418
#21 0x000055d7d8941ce7 in handle_one_connection (arg=0x608000025938) at /git/10.7/sql/sql_connect.cc:1312
#22 0x000055d7d95e2f49 in pfs_spawn_thread (arg=0x617000007e98) at /git/10.7/storage/perfschema/pfs.cc:2201
#23 0x00007fec0bee0609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#24 0x00007fec0bab3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7febfd067700 (LWP 531811)):
#0  0x00007fec0baa6aff in __GI___poll (fds=0x7febfd0666f0, nfds=1, timeout=28800000) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fec0c2fd5ba in poll () from /lib/x86_64-linux-gnu/libasan.so.5
#2  0x000055d7d924f6e9 in vio_io_wait (vio=0x615000041a98, event=VIO_IO_EVENT_READ, timeout=28800000) at /git/10.7/vio/viosocket.c:948
#3  0x000055d7d924b3b6 in vio_socket_io_wait (vio=0x615000041a98, event=VIO_IO_EVENT_READ) at /git/10.7/vio/viosocket.c:116
#4  0x000055d7d924b776 in vio_read (vio=0x615000041a98, buf=0x629001c2f218 "\a", size=4) at /git/10.7/vio/viosocket.c:182
#5  0x000055d7d918a355 in my_real_read (net=0x62b00017a530, complen=0x7febfd066b00, header=1 '\001') at /git/10.7/sql/net_serv.cc:1003
#6  0x000055d7d918bdbb in my_net_read_packet_reallen (net=0x62b00017a530, read_from_server=1 '\001', reallen=0x7febfd066ba0) at /git/10.7/sql/net_serv.cc:1284
#7  0x000055d7d918bc1f in my_net_read_packet (net=0x62b00017a530, read_from_server=1 '\001') at /git/10.7/sql/net_serv.cc:1268
#8  0x000055d7d84a1053 in do_command (thd=0x62b00017a218, blocking=true) at /git/10.7/sql/sql_parse.cc:1264
#9  0x000055d7d894245b in do_handle_one_connection (connect=0x6080001de238, put_in_cache=true) at /git/10.7/sql/sql_connect.cc:1418
#10 0x000055d7d8941ce7 in handle_one_connection (arg=0x608000025838) at /git/10.7/sql/sql_connect.cc:1312
#11 0x000055d7d95e2f49 in pfs_spawn_thread (arg=0x617000007b18) at /git/10.7/storage/perfschema/pfs.cc:2201
#12 0x00007fec0bee0609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#13 0x00007fec0bab3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7febfd177700 (LWP 531808)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55d7dc8c7c88 <COND_manager+40>) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55d7dc8c7ba8 <LOCK_manager+40>, cond=0x55d7dc8c7c60 <COND_manager>) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55d7dc8c7c60 <COND_manager>, mutex=0x55d7dc8c7ba8 <LOCK_manager+40>) at pthread_cond_wait.c:638
#3  0x000055d7da23c2bf in safe_cond_wait (cond=0x55d7dc8c7c60 <COND_manager>, mp=0x55d7dc8c7b80 <LOCK_manager>, file=0x55d7db486680 "/git/10.7/mysys/my_thr_init.c", line=596) at /git/10.7/mysys/thr_mutex.c:494
#4  0x000055d7da22a087 in psi_cond_wait (that=0x55d7dc8c7c60 <COND_manager>, mutex=0x55d7dc8c7b80 <LOCK_manager>, file=0x55d7da598580 "/git/10.7/sql/sql_manager.cc", line=103) at /git/10.7/mysys/my_thr_init.c:596
#5  0x000055d7d8497d36 in inline_mysql_cond_wait (that=0x55d7dc8c7c60 <COND_manager>, mutex=0x55d7dc8c7b80 <LOCK_manager>, src_file=0x55d7da598580 "/git/10.7/sql/sql_manager.cc", src_line=103) at /git/10.7/include/mysql/psi/mysql_thread.h:1070
#6  0x000055d7d84983ce in handle_manager (arg=0x0) at /git/10.7/sql/sql_manager.cc:103
#7  0x000055d7d95e2f49 in pfs_spawn_thread (arg=0x617000007798) at /git/10.7/storage/perfschema/pfs.cc:2201
#8  0x00007fec0bee0609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007fec0bab3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7febfd279700 (LWP 531807)):
#0  0x00007fec0b9d8322 in __GI___sigtimedwait (set=0x7febfd278cf0, info=0x7febfd278b20, timeout=0x0) at ../sysdeps/unix/sysv/linux/sigtimedwait.c:29
#1  0x00007fec0c348111 in ?? () from /lib/x86_64-linux-gnu/libasan.so.5
#2  0x000055d7d80eaf8c in my_sigwait (set=0x7febfd278cf0, sig=0x7febfd278c60, code=0x7febfd278c70) at /git/10.7/include/my_pthread.h:195
#3  0x000055d7d80f9b7a in signal_hand (arg=0x0) at /git/10.7/sql/mysqld.cc:3144
#4  0x000055d7d95e2f49 in pfs_spawn_thread (arg=0x617000004698) at /git/10.7/storage/perfschema/pfs.cc:2201
#5  0x00007fec0bee0609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fec0bab3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fec00730700 (LWP 531803)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x000055d7d9ca1596 in ssux_lock_impl<false>::wait (this=0x55d7dc537148 <dict_sys+72>, lk=2147483649) at /git/10.7/storage/innobase/sync/srw_lock.cc:354
#2  0x000055d7d9ca06eb in ssux_lock_impl<false>::wr_wait (this=0x55d7dc537148 <dict_sys+72>, lk=2147483649) at /git/10.7/storage/innobase/sync/srw_lock.cc:509
#3  0x000055d7d9849c71 in ssux_lock_impl<false>::wr_lock (this=0x55d7dc537148 <dict_sys+72>) at /git/10.7/storage/innobase/include/srw_lock.h:232
#4  0x000055d7d9ca0c67 in srw_lock_impl<false>::psi_wr_lock (this=0x55d7dc537140 <dict_sys+64>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=1310) at /git/10.7/storage/innobase/sync/srw_lock.cc:598
#5  0x000055d7d9a44827 in srw_lock_impl<false>::wr_lock (this=0x55d7dc537140 <dict_sys+64>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=1310) at /git/10.7/storage/innobase/include/srw_lock.h:494
#6  0x000055d7d9e82dc4 in dict_sys_t::lock_wait (this=0x55d7dc537100 <dict_sys>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=1310) at /git/10.7/storage/innobase/dict/dict0dict.cc:961
#7  0x000055d7d983ce5e in dict_sys_t::lock (this=0x55d7dc537100 <dict_sys>, file=0x55d7db31f560 "/git/10.7/storage/innobase/dict/dict0dict.cc", line=1310) at /git/10.7/storage/innobase/include/dict0dict.h:1568
#8  0x000055d7d9e85f3f in dict_sys_t::evict_table_LRU (this=0x55d7dc537100 <dict_sys>, half=false) at /git/10.7/storage/innobase/dict/dict0dict.cc:1310
#9  0x000055d7d9c82516 in srv_master_do_idle_tasks (counter_time=159698421003) at /git/10.7/storage/innobase/srv/srv0srv.cc:1605
#10 0x000055d7d9c82bff in srv_master_callback () at /git/10.7/storage/innobase/srv/srv0srv.cc:1663
#11 0x000055d7da05f474 in tpool::thread_pool_generic::timer_generic::run (this=0x612000041ec0) at /git/10.7/tpool/tpool_generic.cc:313
#12 0x000055d7da05f756 in tpool::thread_pool_generic::timer_generic::execute (arg=0x612000041ec0) at /git/10.7/tpool/tpool_generic.cc:332
#13 0x000055d7da06f1dd in tpool::task::execute (this=0x612000041f00) at /git/10.7/tpool/task.cc:37
#14 0x000055d7da05b927 in tpool::thread_pool_generic::worker_main (this=0x618000000c80, thread_var=0x63000002fd80) at /git/10.7/tpool/tpool_generic.cc:549
#15 0x000055d7da06e311 in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__f=@0x6040000014a8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55d7da05b744 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=@0x6040000014a0: 0x618000000c80) at /usr/include/c++/9/bits/invoke.h:73
#16 0x000055d7da06e0bc in std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=@0x6040000014a8: (void (tpool::thread_pool_generic::*)(class tpool::thread_pool_generic * const, struct tpool::worker_data *)) 0x55d7da05b744 <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>) at /usr/include/c++/9/bits/invoke.h:95
#17 0x000055d7da06df4d in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=0x604000001498) at /usr/include/c++/9/thread:244
#18 0x000055d7da06de97 in std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=0x604000001498) at /usr/include/c++/9/thread:251
#19 0x000055d7da06ddfc in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=0x604000001490) at /usr/include/c++/9/thread:195
#20 0x00007fec0bdc5de4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#21 0x00007fec0bee0609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#22 0x00007fec0bab3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fec01383700 (LWP 531802)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55d7dc4eeb6c <buf_pool+17580>) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55d7dc4eea68 <buf_pool+17320>, cond=0x55d7dc4eeb40 <buf_pool+17536>) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55d7dc4eeb40 <buf_pool+17536>, mutex=0x55d7dc4eea68 <buf_pool+17320>) at pthread_cond_wait.c:638
#3  0x000055d7da23c2bf in safe_cond_wait (cond=0x55d7dc4eeb40 <buf_pool+17536>, mp=0x55d7dc4eea40 <buf_pool+17280>, file=0x55d7db2dfe00 "/git/10.7/storage/innobase/buf/buf0flu.cc", line=2202) at /git/10.7/mysys/thr_mutex.c:494
#4  0x000055d7d9e3f8b7 in buf_flush_page_cleaner () at /git/10.7/storage/innobase/buf/buf0flu.cc:2202
#5  0x000055d7d9e452d0 in std::__invoke_impl<void, void (*)()> (__f=@0x602000000078: 0x55d7d9e3f1e5 <buf_flush_page_cleaner()>) at /usr/include/c++/9/bits/invoke.h:60
#6  0x000055d7d9e4520c in std::__invoke<void (*)()> (__fn=@0x602000000078: 0x55d7d9e3f1e5 <buf_flush_page_cleaner()>) at /usr/include/c++/9/bits/invoke.h:95
#7  0x000055d7d9e45132 in std::thread::_Invoker<std::tuple<void (*)()> >::_M_invoke<0ul> (this=0x602000000078) at /usr/include/c++/9/thread:244
#8  0x000055d7d9e450b3 in std::thread::_Invoker<std::tuple<void (*)()> >::operator() (this=0x602000000078) at /usr/include/c++/9/thread:251
#9  0x000055d7d9e45018 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (*)()> > >::_M_run (this=0x602000000070) at /usr/include/c++/9/thread:195
#10 0x00007fec0bdc5de4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#11 0x00007fec0bee0609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#12 0x00007fec0bab3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fec02800700 (LWP 531801)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x000055d7da07006a in my_getevents (ctx=0x7fec02801000, min_nr=1, nr=256, ev=0x7fec027fdb10) at /git/10.7/tpool/aio_linux.cc:62
#2  0x000055d7da07066d in tpool::aio_linux::getevent_thread_routine (aio=0x6030000006d0) at /git/10.7/tpool/aio_linux.cc:104
#3  0x000055d7da071e49 in std::__invoke_impl<void, void (*)(tpool::aio_linux*), tpool::aio_linux*> (__f=@0x603000000710: 0x55d7da07051c <tpool::aio_linux::getevent_thread_routine(tpool::aio_linux*)>) at /usr/include/c++/9/bits/invoke.h:60
#4  0x000055d7da071d1c in std::__invoke<void (*)(tpool::aio_linux*), tpool::aio_linux*> (__fn=@0x603000000710: 0x55d7da07051c <tpool::aio_linux::getevent_thread_routine(tpool::aio_linux*)>) at /usr/include/c++/9/bits/invoke.h:95
#5  0x000055d7da071bf9 in std::thread::_Invoker<std::tuple<void (*)(tpool::aio_linux*), tpool::aio_linux*> >::_M_invoke<0ul, 1ul> (this=0x603000000708) at /usr/include/c++/9/thread:244
#6  0x000055d7da071b5f in std::thread::_Invoker<std::tuple<void (*)(tpool::aio_linux*), tpool::aio_linux*> >::operator() (this=0x603000000708) at /usr/include/c++/9/thread:251
#7  0x000055d7da071ac4 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (*)(tpool::aio_linux*), tpool::aio_linux*> > >::_M_run (this=0x603000000700) at /usr/include/c++/9/thread:195
#8  0x00007fec0bdc5de4 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#9  0x00007fec0bee0609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007fec0bab3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fec0342b700 (LWP 531800)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7fec0342ac40, clockid=<optimized out>, expected=0, futex_word=0x55d7dd12a788 <COND_checkpoint+40>) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7fec0342ac40, clockid=<optimized out>, mutex=0x55d7dd12a6a8 <LOCK_checkpoint+40>, cond=0x55d7dd12a760 <COND_checkpoint>) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x55d7dd12a760 <COND_checkpoint>, mutex=0x55d7dd12a6a8 <LOCK_checkpoint+40>, abstime=0x7fec0342ac40) at pthread_cond_wait.c:656
#3  0x000055d7da23cbf8 in safe_cond_timedwait (cond=0x55d7dd12a760 <COND_checkpoint>, mp=0x55d7dd12a680 <LOCK_checkpoint>, abstime=0x7fec0342ac40, file=0x55d7db486680 "/git/10.7/mysys/my_thr_init.c", line=609) at /git/10.7/mysys/thr_mutex.c:548
#4  0x000055d7da22a358 in psi_cond_timedwait (that=0x55d7dd12a760 <COND_checkpoint>, mutex=0x55d7dd12a680 <LOCK_checkpoint>, abstime=0x7fec0342ac40, file=0x55d7dacbdca0 "/git/10.7/storage/maria/ma_servicethread.c", line=115) at /git/10.7/mysys/my_thr_init.c:609
#5  0x000055d7d93ec6c5 in inline_mysql_cond_timedwait (that=0x55d7dd12a760 <COND_checkpoint>, mutex=0x55d7dd12a680 <LOCK_checkpoint>, abstime=0x7fec0342ac40, src_file=0x55d7dacbdca0 "/git/10.7/storage/maria/ma_servicethread.c", src_line=115) at /git/10.7/include/mysql/psi/mysql_thread.h:1086
#6  0x000055d7d93ed48a in my_service_thread_sleep (control=0x55d7dc070f00 <checkpoint_control>, sleep_time=30000000000) at /git/10.7/storage/maria/ma_servicethread.c:115
#7  0x000055d7d93cf50d in ma_checkpoint_background (arg=0x1e) at /git/10.7/storage/maria/ma_checkpoint.c:725
#8  0x000055d7d95e2f49 in pfs_spawn_thread (arg=0x617000000e98) at /git/10.7/storage/perfschema/pfs.cc:2201
#9  0x00007fec0bee0609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007fec0bab3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fec0434c700 (LWP 531799)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7fec0434bd90, clockid=<optimized out>, expected=0, futex_word=0x55d7dd20970c <COND_timer+44>) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7fec0434bd90, clockid=<optimized out>, mutex=0x55d7dd209628 <LOCK_timer+40>, cond=0x55d7dd2096e0 <COND_timer>) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x55d7dd2096e0 <COND_timer>, mutex=0x55d7dd209628 <LOCK_timer+40>, abstime=0x7fec0434bd90) at pthread_cond_wait.c:656
#3  0x000055d7da23cbf8 in safe_cond_timedwait (cond=0x55d7dd2096e0 <COND_timer>, mp=0x55d7dd209600 <LOCK_timer>, abstime=0x7fec0434bd90, file=0x55d7db486680 "/git/10.7/mysys/my_thr_init.c", line=609) at /git/10.7/mysys/thr_mutex.c:548
#4  0x000055d7da22a358 in psi_cond_timedwait (that=0x55d7dd2096e0 <COND_timer>, mutex=0x55d7dd209600 <LOCK_timer>, abstime=0x7fec0434bd90, file=0x55d7db489dc0 "/git/10.7/mysys/thr_timer.c", line=321) at /git/10.7/mysys/my_thr_init.c:609
#5  0x000055d7da23f67e in inline_mysql_cond_timedwait (that=0x55d7dd2096e0 <COND_timer>, mutex=0x55d7dd209600 <LOCK_timer>, abstime=0x7fec0434bd90, src_file=0x55d7db489dc0 "/git/10.7/mysys/thr_timer.c", src_line=321) at /git/10.7/include/mysql/psi/mysql_thread.h:1086
#6  0x000055d7da24185e in timer_handler (arg=0x0) at /git/10.7/mysys/thr_timer.c:321
#7  0x000055d7d95e2f49 in pfs_spawn_thread (arg=0x617000000418) at /git/10.7/storage/perfschema/pfs.cc:2201
#8  0x00007fec0bee0609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007fec0bab3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fec0b981800 (LWP 531798)):
#0  0x00007fec0baa6aff in __GI___poll (fds=0x60e0000064f8, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fec0c2fd5ba in poll () from /lib/x86_64-linux-gnu/libasan.so.5
#2  0x000055d7d8104672 in handle_connections_sockets () at /git/10.7/sql/mysqld.cc:6155
#3  0x000055d7d8102e5c in mysqld_main (argc=155, argv=0x61a0000000f0) at /git/10.7/sql/mysqld.cc:5860
#4  0x000055d7d80eae0d in main (argc=23, argv=0x7fff86853398) at /git/10.7/sql/main.cc:34
[Inferior 1 (process 531798) detached]