[New LWP 16823] [New LWP 16824] [New LWP 16826] [New LWP 16827] [New LWP 16829] [New LWP 16830] [New LWP 16831] [New LWP 16832] [New LWP 16833] [New LWP 16834] [New LWP 16835] [New LWP 16836] [New LWP 16837] [New LWP 16838] [New LWP 16839] [New LWP 16840] [New LWP 16841] [New LWP 16842] [New LWP 16843] [New LWP 16844] [New LWP 16845] [New LWP 16846] [New LWP 16847] [New LWP 16848] [New LWP 16849] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". 0x00007f251e3348bd in poll () at ../sysdeps/unix/syscall-template.S:84 Thread 26 (Thread 0x7f24c17fa700 (LWP 16849)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549d25675 in __gthread_cond_timedwait (__abs_timeout=0x7f24c17f9de0, __mutex=, __cond=0x55754cd072b0) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871 #2 std::condition_variable::__wait_until_impl > > (__atime=..., __lock=..., this=0x55754cd072b0) at /usr/include/c++/6/condition_variable:166 #3 std::condition_variable::wait_until > > (__atime=..., __lock=..., this=0x55754cd072b0) at /usr/include/c++/6/condition_variable:106 #4 std::condition_variable::wait_for > (__rtime=..., __lock=..., this=0x55754cd072b0) at /usr/include/c++/6/condition_variable:138 #5 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x55754ccf7fa0, lk=..., thread_data=thread_data@entry=0x55754cd072b0) at /data/src/10.5/tpool/tpool_generic.cc:418 #6 0x0000557549d25bd0 in tpool::thread_pool_generic::get_task (this=this@entry=0x55754ccf7fa0, thread_var=thread_var@entry=0x55754cd072b0, t=t@entry=0x7f24c17f9e88) at /data/src/10.5/tpool/tpool_generic.cc:471 #7 0x0000557549d2748d in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd072b0) at /data/src/10.5/tpool/tpool_generic.cc:516 #8 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #9 0x00007f251f2bf4a4 in start_thread (arg=0x7f24c17fa700) at pthread_create.c:456 #10 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 25 (Thread 0x7f24c1ffb700 (LWP 16848)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549d25675 in __gthread_cond_timedwait (__abs_timeout=0x7f24c1ffade0, __mutex=, __cond=0x55754cd07330) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871 #2 std::condition_variable::__wait_until_impl > > (__atime=..., __lock=..., this=0x55754cd07330) at /usr/include/c++/6/condition_variable:166 #3 std::condition_variable::wait_until > > (__atime=..., __lock=..., this=0x55754cd07330) at /usr/include/c++/6/condition_variable:106 #4 std::condition_variable::wait_for > (__rtime=..., __lock=..., this=0x55754cd07330) at /usr/include/c++/6/condition_variable:138 #5 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x55754ccf7fa0, lk=..., thread_data=thread_data@entry=0x55754cd07330) at /data/src/10.5/tpool/tpool_generic.cc:418 #6 0x0000557549d25bd0 in tpool::thread_pool_generic::get_task (this=this@entry=0x55754ccf7fa0, thread_var=thread_var@entry=0x55754cd07330, t=t@entry=0x7f24c1ffae88) at /data/src/10.5/tpool/tpool_generic.cc:471 #7 0x0000557549d2748d in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd07330) at /data/src/10.5/tpool/tpool_generic.cc:516 #8 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #9 0x00007f251f2bf4a4 in start_thread (arg=0x7f24c1ffb700) at pthread_create.c:456 #10 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 24 (Thread 0x7f24c27fc700 (LWP 16847)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549d25675 in __gthread_cond_timedwait (__abs_timeout=0x7f24c27fbde0, __mutex=, __cond=0x55754cd073b0) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871 #2 std::condition_variable::__wait_until_impl > > (__atime=..., __lock=..., this=0x55754cd073b0) at /usr/include/c++/6/condition_variable:166 #3 std::condition_variable::wait_until > > (__atime=..., __lock=..., this=0x55754cd073b0) at /usr/include/c++/6/condition_variable:106 #4 std::condition_variable::wait_for > (__rtime=..., __lock=..., this=0x55754cd073b0) at /usr/include/c++/6/condition_variable:138 #5 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x55754ccf7fa0, lk=..., thread_data=thread_data@entry=0x55754cd073b0) at /data/src/10.5/tpool/tpool_generic.cc:418 #6 0x0000557549d25bd0 in tpool::thread_pool_generic::get_task (this=this@entry=0x55754ccf7fa0, thread_var=thread_var@entry=0x55754cd073b0, t=t@entry=0x7f24c27fbe88) at /data/src/10.5/tpool/tpool_generic.cc:471 #7 0x0000557549d2748d in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd073b0) at /data/src/10.5/tpool/tpool_generic.cc:516 #8 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #9 0x00007f251f2bf4a4 in start_thread (arg=0x7f24c27fc700) at pthread_create.c:456 #10 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 23 (Thread 0x7f24c2ffd700 (LWP 16846)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549d25675 in __gthread_cond_timedwait (__abs_timeout=0x7f24c2ffcde0, __mutex=, __cond=0x55754cd07430) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871 #2 std::condition_variable::__wait_until_impl > > (__atime=..., __lock=..., this=0x55754cd07430) at /usr/include/c++/6/condition_variable:166 #3 std::condition_variable::wait_until > > (__atime=..., __lock=..., this=0x55754cd07430) at /usr/include/c++/6/condition_variable:106 #4 std::condition_variable::wait_for > (__rtime=..., __lock=..., this=0x55754cd07430) at /usr/include/c++/6/condition_variable:138 #5 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x55754ccf7fa0, lk=..., thread_data=thread_data@entry=0x55754cd07430) at /data/src/10.5/tpool/tpool_generic.cc:418 #6 0x0000557549d25bd0 in tpool::thread_pool_generic::get_task (this=this@entry=0x55754ccf7fa0, thread_var=thread_var@entry=0x55754cd07430, t=t@entry=0x7f24c2ffce88) at /data/src/10.5/tpool/tpool_generic.cc:471 #7 0x0000557549d2748d in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd07430) at /data/src/10.5/tpool/tpool_generic.cc:516 #8 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #9 0x00007f251f2bf4a4 in start_thread (arg=0x7f24c2ffd700) at pthread_create.c:456 #10 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 22 (Thread 0x7f24c37fe700 (LWP 16845)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549d25675 in __gthread_cond_timedwait (__abs_timeout=0x7f24c37fdde0, __mutex=, __cond=0x55754cd074b0) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871 #2 std::condition_variable::__wait_until_impl > > (__atime=..., __lock=..., this=0x55754cd074b0) at /usr/include/c++/6/condition_variable:166 #3 std::condition_variable::wait_until > > (__atime=..., __lock=..., this=0x55754cd074b0) at /usr/include/c++/6/condition_variable:106 #4 std::condition_variable::wait_for > (__rtime=..., __lock=..., this=0x55754cd074b0) at /usr/include/c++/6/condition_variable:138 #5 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x55754ccf7fa0, lk=..., thread_data=thread_data@entry=0x55754cd074b0) at /data/src/10.5/tpool/tpool_generic.cc:418 #6 0x0000557549d25bd0 in tpool::thread_pool_generic::get_task (this=this@entry=0x55754ccf7fa0, thread_var=thread_var@entry=0x55754cd074b0, t=t@entry=0x7f24c37fde88) at /data/src/10.5/tpool/tpool_generic.cc:471 #7 0x0000557549d2748d in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd074b0) at /data/src/10.5/tpool/tpool_generic.cc:516 #8 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #9 0x00007f251f2bf4a4 in start_thread (arg=0x7f24c37fe700) at pthread_create.c:456 #10 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 21 (Thread 0x7f24c3fff700 (LWP 16844)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549d25675 in __gthread_cond_timedwait (__abs_timeout=0x7f24c3ffede0, __mutex=, __cond=0x55754cd07530) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871 #2 std::condition_variable::__wait_until_impl > > (__atime=..., __lock=..., this=0x55754cd07530) at /usr/include/c++/6/condition_variable:166 #3 std::condition_variable::wait_until > > (__atime=..., __lock=..., this=0x55754cd07530) at /usr/include/c++/6/condition_variable:106 #4 std::condition_variable::wait_for > (__rtime=..., __lock=..., this=0x55754cd07530) at /usr/include/c++/6/condition_variable:138 #5 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x55754ccf7fa0, lk=..., thread_data=thread_data@entry=0x55754cd07530) at /data/src/10.5/tpool/tpool_generic.cc:418 #6 0x0000557549d25bd0 in tpool::thread_pool_generic::get_task (this=this@entry=0x55754ccf7fa0, thread_var=thread_var@entry=0x55754cd07530, t=t@entry=0x7f24c3ffee88) at /data/src/10.5/tpool/tpool_generic.cc:471 #7 0x0000557549d2748d in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd07530) at /data/src/10.5/tpool/tpool_generic.cc:516 #8 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #9 0x00007f251f2bf4a4 in start_thread (arg=0x7f24c3fff700) at pthread_create.c:456 #10 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 20 (Thread 0x7f24e0ff9700 (LWP 16843)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549d25675 in __gthread_cond_timedwait (__abs_timeout=0x7f24e0ff8de0, __mutex=, __cond=0x55754cd075b0) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871 #2 std::condition_variable::__wait_until_impl > > (__atime=..., __lock=..., this=0x55754cd075b0) at /usr/include/c++/6/condition_variable:166 #3 std::condition_variable::wait_until > > (__atime=..., __lock=..., this=0x55754cd075b0) at /usr/include/c++/6/condition_variable:106 #4 std::condition_variable::wait_for > (__rtime=..., __lock=..., this=0x55754cd075b0) at /usr/include/c++/6/condition_variable:138 #5 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x55754ccf7fa0, lk=..., thread_data=thread_data@entry=0x55754cd075b0) at /data/src/10.5/tpool/tpool_generic.cc:418 #6 0x0000557549d25bd0 in tpool::thread_pool_generic::get_task (this=this@entry=0x55754ccf7fa0, thread_var=thread_var@entry=0x55754cd075b0, t=t@entry=0x7f24e0ff8e88) at /data/src/10.5/tpool/tpool_generic.cc:471 #7 0x0000557549d2748d in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd075b0) at /data/src/10.5/tpool/tpool_generic.cc:516 #8 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #9 0x00007f251f2bf4a4 in start_thread (arg=0x7f24e0ff9700) at pthread_create.c:456 #10 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 19 (Thread 0x7f24e17fa700 (LWP 16842)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549d25675 in __gthread_cond_timedwait (__abs_timeout=0x7f24e17f9de0, __mutex=, __cond=0x55754cd07630) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871 #2 std::condition_variable::__wait_until_impl > > (__atime=..., __lock=..., this=0x55754cd07630) at /usr/include/c++/6/condition_variable:166 #3 std::condition_variable::wait_until > > (__atime=..., __lock=..., this=0x55754cd07630) at /usr/include/c++/6/condition_variable:106 #4 std::condition_variable::wait_for > (__rtime=..., __lock=..., this=0x55754cd07630) at /usr/include/c++/6/condition_variable:138 #5 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x55754ccf7fa0, lk=..., thread_data=thread_data@entry=0x55754cd07630) at /data/src/10.5/tpool/tpool_generic.cc:418 #6 0x0000557549d25bd0 in tpool::thread_pool_generic::get_task (this=this@entry=0x55754ccf7fa0, thread_var=thread_var@entry=0x55754cd07630, t=t@entry=0x7f24e17f9e88) at /data/src/10.5/tpool/tpool_generic.cc:471 #7 0x0000557549d2748d in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd07630) at /data/src/10.5/tpool/tpool_generic.cc:516 #8 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #9 0x00007f251f2bf4a4 in start_thread (arg=0x7f24e17fa700) at pthread_create.c:456 #10 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 18 (Thread 0x7f24e1ffb700 (LWP 16841)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549d25675 in __gthread_cond_timedwait (__abs_timeout=0x7f24e1ffade0, __mutex=, __cond=0x55754cd076b0) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871 #2 std::condition_variable::__wait_until_impl > > (__atime=..., __lock=..., this=0x55754cd076b0) at /usr/include/c++/6/condition_variable:166 #3 std::condition_variable::wait_until > > (__atime=..., __lock=..., this=0x55754cd076b0) at /usr/include/c++/6/condition_variable:106 #4 std::condition_variable::wait_for > (__rtime=..., __lock=..., this=0x55754cd076b0) at /usr/include/c++/6/condition_variable:138 #5 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x55754ccf7fa0, lk=..., thread_data=thread_data@entry=0x55754cd076b0) at /data/src/10.5/tpool/tpool_generic.cc:418 #6 0x0000557549d25bd0 in tpool::thread_pool_generic::get_task (this=this@entry=0x55754ccf7fa0, thread_var=thread_var@entry=0x55754cd076b0, t=t@entry=0x7f24e1ffae88) at /data/src/10.5/tpool/tpool_generic.cc:471 #7 0x0000557549d2748d in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd076b0) at /data/src/10.5/tpool/tpool_generic.cc:516 #8 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #9 0x00007f251f2bf4a4 in start_thread (arg=0x7f24e1ffb700) at pthread_create.c:456 #10 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 17 (Thread 0x7f24e27fc700 (LWP 16840)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549d25675 in __gthread_cond_timedwait (__abs_timeout=0x7f24e27fbde0, __mutex=, __cond=0x55754cd07730) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871 #2 std::condition_variable::__wait_until_impl > > (__atime=..., __lock=..., this=0x55754cd07730) at /usr/include/c++/6/condition_variable:166 #3 std::condition_variable::wait_until > > (__atime=..., __lock=..., this=0x55754cd07730) at /usr/include/c++/6/condition_variable:106 #4 std::condition_variable::wait_for > (__rtime=..., __lock=..., this=0x55754cd07730) at /usr/include/c++/6/condition_variable:138 #5 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x55754ccf7fa0, lk=..., thread_data=thread_data@entry=0x55754cd07730) at /data/src/10.5/tpool/tpool_generic.cc:418 #6 0x0000557549d25bd0 in tpool::thread_pool_generic::get_task (this=this@entry=0x55754ccf7fa0, thread_var=thread_var@entry=0x55754cd07730, t=t@entry=0x7f24e27fbe88) at /data/src/10.5/tpool/tpool_generic.cc:471 #7 0x0000557549d2748d in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd07730) at /data/src/10.5/tpool/tpool_generic.cc:516 #8 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #9 0x00007f251f2bf4a4 in start_thread (arg=0x7f24e27fc700) at pthread_create.c:456 #10 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 16 (Thread 0x7f24e2ffd700 (LWP 16839)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549d25675 in __gthread_cond_timedwait (__abs_timeout=0x7f24e2ffcde0, __mutex=, __cond=0x55754cd077b0) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871 #2 std::condition_variable::__wait_until_impl > > (__atime=..., __lock=..., this=0x55754cd077b0) at /usr/include/c++/6/condition_variable:166 #3 std::condition_variable::wait_until > > (__atime=..., __lock=..., this=0x55754cd077b0) at /usr/include/c++/6/condition_variable:106 #4 std::condition_variable::wait_for > (__rtime=..., __lock=..., this=0x55754cd077b0) at /usr/include/c++/6/condition_variable:138 #5 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x55754ccf7fa0, lk=..., thread_data=thread_data@entry=0x55754cd077b0) at /data/src/10.5/tpool/tpool_generic.cc:418 #6 0x0000557549d25bd0 in tpool::thread_pool_generic::get_task (this=this@entry=0x55754ccf7fa0, thread_var=thread_var@entry=0x55754cd077b0, t=t@entry=0x7f24e2ffce88) at /data/src/10.5/tpool/tpool_generic.cc:471 #7 0x0000557549d2748d in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd077b0) at /data/src/10.5/tpool/tpool_generic.cc:516 #8 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #9 0x00007f251f2bf4a4 in start_thread (arg=0x7f24e2ffd700) at pthread_create.c:456 #10 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 15 (Thread 0x7f24e37fe700 (LWP 16838)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549d25675 in __gthread_cond_timedwait (__abs_timeout=0x7f24e37fdde0, __mutex=, __cond=0x55754cd07830) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871 #2 std::condition_variable::__wait_until_impl > > (__atime=..., __lock=..., this=0x55754cd07830) at /usr/include/c++/6/condition_variable:166 #3 std::condition_variable::wait_until > > (__atime=..., __lock=..., this=0x55754cd07830) at /usr/include/c++/6/condition_variable:106 #4 std::condition_variable::wait_for > (__rtime=..., __lock=..., this=0x55754cd07830) at /usr/include/c++/6/condition_variable:138 #5 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x55754ccf7fa0, lk=..., thread_data=thread_data@entry=0x55754cd07830) at /data/src/10.5/tpool/tpool_generic.cc:418 #6 0x0000557549d25bd0 in tpool::thread_pool_generic::get_task (this=this@entry=0x55754ccf7fa0, thread_var=thread_var@entry=0x55754cd07830, t=t@entry=0x7f24e37fde88) at /data/src/10.5/tpool/tpool_generic.cc:471 #7 0x0000557549d2748d in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd07830) at /data/src/10.5/tpool/tpool_generic.cc:516 #8 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #9 0x00007f251f2bf4a4 in start_thread (arg=0x7f24e37fe700) at pthread_create.c:456 #10 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 14 (Thread 0x7f24e3fff700 (LWP 16837)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549d25675 in __gthread_cond_timedwait (__abs_timeout=0x7f24e3ffede0, __mutex=, __cond=0x55754cd078b0) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871 #2 std::condition_variable::__wait_until_impl > > (__atime=..., __lock=..., this=0x55754cd078b0) at /usr/include/c++/6/condition_variable:166 #3 std::condition_variable::wait_until > > (__atime=..., __lock=..., this=0x55754cd078b0) at /usr/include/c++/6/condition_variable:106 #4 std::condition_variable::wait_for > (__rtime=..., __lock=..., this=0x55754cd078b0) at /usr/include/c++/6/condition_variable:138 #5 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x55754ccf7fa0, lk=..., thread_data=thread_data@entry=0x55754cd078b0) at /data/src/10.5/tpool/tpool_generic.cc:418 #6 0x0000557549d25bd0 in tpool::thread_pool_generic::get_task (this=this@entry=0x55754ccf7fa0, thread_var=thread_var@entry=0x55754cd078b0, t=t@entry=0x7f24e3ffee88) at /data/src/10.5/tpool/tpool_generic.cc:471 #7 0x0000557549d2748d in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd078b0) at /data/src/10.5/tpool/tpool_generic.cc:516 #8 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #9 0x00007f251f2bf4a4 in start_thread (arg=0x7f24e3fff700) at pthread_create.c:456 #10 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 13 (Thread 0x7f25135b4700 (LWP 16836)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549681f7c in inline_mysql_cond_timedwait (src_file=0x557549f24800 "/data/src/10.5/sql/mdl.cc", src_line=1167, abstime=0x7f25135b2ba0, mutex=0x7f24e4000ad8, that=0x7f24e4000b08) at /data/src/10.5/include/mysql/psi/mysql_thread.h:1257 #2 MDL_wait::timed_wait (this=this@entry=0x7f24e4000ad8, owner=0x7f24e4000a88, abs_timeout=abs_timeout@entry=0x7f25135b2ba0, set_status_on_timeout=set_status_on_timeout@entry=false, wait_state_name=) at /data/src/10.5/sql/mdl.cc:1167 #3 0x0000557549683a0f in MDL_context::acquire_lock (this=this@entry=0x7f24e4000ad8, mdl_request=, lock_wait_timeout=lock_wait_timeout@entry=86400) at /data/src/10.5/sql/mdl.cc:2333 #4 0x00005575496842ed in MDL_context::acquire_locks (this=this@entry=0x7f24e4000ad8, mdl_requests=mdl_requests@entry=0x7f25135b2ce0, lock_wait_timeout=lock_wait_timeout@entry=86400) at /data/src/10.5/sql/mdl.cc:2459 #5 0x0000557549524753 in lock_table_names (thd=thd@entry=0x7f24e40009b8, options=..., tables_start=tables_start@entry=0x7f24e4012808, tables_end=tables_end@entry=0x0, lock_wait_timeout=, flags=flags@entry=0) at /data/src/10.5/sql/sql_base.cc:4020 #6 0x000055754961497a in lock_table_names (flags=0, lock_wait_timeout=, table_list_end=0x0, table_list=0x7f24e4012808, thd=0x7f24e40009b8) at /data/src/10.5/sql/sql_base.h:253 #7 mysql_rm_table (thd=thd@entry=0x7f24e40009b8, tables=tables@entry=0x7f24e4012808, if_exists=, drop_temporary=, drop_sequence=, dont_log_query=dont_log_query@entry=false) at /data/src/10.5/sql/sql_table.cc:2088 #8 0x000055754958a0b8 in mysql_execute_command (thd=thd@entry=0x7f24e40009b8) at /data/src/10.5/sql/sql_parse.cc:4929 #9 0x000055754958e1dc in mysql_parse (thd=thd@entry=0x7f24e40009b8, rawbuf=, length=13, parser_state=parser_state@entry=0x7f25135b3500, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /data/src/10.5/sql/sql_parse.cc:7995 #10 0x0000557549583ff8 in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x7f24e40009b8, packet=packet@entry=0x7f24e4007df9 "DROP TABLE t1", packet_length=packet_length@entry=13, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /data/src/10.5/sql/sql_parse.cc:1875 #11 0x00005575495823ae in do_command (thd=0x7f24e40009b8) at /data/src/10.5/sql/sql_parse.cc:1356 #12 0x0000557549679930 in do_handle_one_connection (connect=, connect@entry=0x55754d18ba48, put_in_cache=put_in_cache@entry=true) at /data/src/10.5/sql/sql_connect.cc:1411 #13 0x0000557549679f94 in handle_one_connection (arg=arg@entry=0x55754d18ba48) at /data/src/10.5/sql/sql_connect.cc:1313 #14 0x00005575499ea9e1 in pfs_spawn_thread (arg=0x55754ccbcaa8) at /data/src/10.5/storage/perfschema/pfs.cc:2201 #15 0x00007f251f2bf4a4 in start_thread (arg=0x7f25135b4700) at pthread_create.c:456 #16 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 12 (Thread 0x7f25135ff700 (LWP 16835)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00005575494db4af in inline_mysql_cond_wait (that=, mutex=, src_file=0x557549f0d15d "/data/src/10.5/sql/slave.cc", src_line=525) at /data/src/10.5/include/mysql/psi/mysql_thread.h:1220 #2 handle_slave_background (arg=arg@entry=0x0) at /data/src/10.5/sql/slave.cc:525 #3 0x00005575499ea9e1 in pfs_spawn_thread (arg=0x55754ccbcaa8) at /data/src/10.5/storage/perfschema/pfs.cc:2201 #4 0x00007f251f2bf4a4 in start_thread (arg=0x7f25135ff700) at pthread_create.c:456 #5 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 11 (Thread 0x7f2518085700 (LWP 16834)): #0 0x00007f251e288f26 in __GI___sigwaitinfo (set=, set@entry=0x7f2518084d50, info=info@entry=0x7f2518084dd0) at ../sysdeps/unix/sysv/linux/sigwaitinfo.c:56 #1 0x00005575494bd5cb in my_sigwait (code=, sig=0x7f2518084d48, set=0x7f2518084d50) at /data/src/10.5/include/my_pthread.h:196 #2 signal_hand (arg=arg@entry=0x0) at /data/src/10.5/sql/mysqld.cc:2987 #3 0x00005575499ea9e1 in pfs_spawn_thread (arg=0x55754cebfcd8) at /data/src/10.5/storage/perfschema/pfs.cc:2201 #4 0x00007f251f2bf4a4 in start_thread (arg=0x7f2518085700) at pthread_create.c:456 #5 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 10 (Thread 0x7f25109f5700 (LWP 16833)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549d25675 in __gthread_cond_timedwait (__abs_timeout=0x7f25109f4de0, __mutex=, __cond=0x55754cd07930) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871 #2 std::condition_variable::__wait_until_impl > > (__atime=..., __lock=..., this=0x55754cd07930) at /usr/include/c++/6/condition_variable:166 #3 std::condition_variable::wait_until > > (__atime=..., __lock=..., this=0x55754cd07930) at /usr/include/c++/6/condition_variable:106 #4 std::condition_variable::wait_for > (__rtime=..., __lock=..., this=0x55754cd07930) at /usr/include/c++/6/condition_variable:138 #5 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x55754ccf7fa0, lk=..., thread_data=thread_data@entry=0x55754cd07930) at /data/src/10.5/tpool/tpool_generic.cc:418 #6 0x0000557549d25bd0 in tpool::thread_pool_generic::get_task (this=this@entry=0x55754ccf7fa0, thread_var=thread_var@entry=0x55754cd07930, t=t@entry=0x7f25109f4e88) at /data/src/10.5/tpool/tpool_generic.cc:471 #7 0x0000557549d2748d in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd07930) at /data/src/10.5/tpool/tpool_generic.cc:516 #8 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #9 0x00007f251f2bf4a4 in start_thread (arg=0x7f25109f5700) at pthread_create.c:456 #10 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 9 (Thread 0x7f25111f6700 (LWP 16832)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x0000557549b0e176 in os_event::wait (this=0x55754cdf30f8) at /data/src/10.5/storage/innobase/os/os0event.cc:158 #2 os_event::wait_low (reset_sig_count=1, this=0x55754cdf30f8) at /data/src/10.5/storage/innobase/os/os0event.cc:325 #3 os_event_wait_low (event=0x55754cdf30f8, reset_sig_count=) at /data/src/10.5/storage/innobase/os/os0event.cc:502 #4 0x0000557549bac7eb in sync_array_wait_event (arr=arr@entry=0x55754cccdff8, cell=@0x7f25111f1e58: 0x55754ccce098) at /data/src/10.5/storage/innobase/sync/sync0arr.cc:456 #5 0x0000557549bae7e2 in rw_lock_s_lock_spin (lock=lock@entry=0x7f2513815388, pass=pass@entry=0, file_name=file_name@entry=0x55754a0d59f8 "/data/src/10.5/storage/innobase/btr/btr0cur.cc", line=line@entry=6671) at /data/src/10.5/storage/innobase/sync/sync0rw.cc:367 #6 0x0000557549c38bdb in rw_lock_s_lock_func (pass=0, line=6671, file_name=0x55754a0d59f8 "/data/src/10.5/storage/innobase/btr/btr0cur.cc", lock=0x7f2513815388) at /data/src/10.5/storage/innobase/include/sync0rw.ic:294 #7 pfs_rw_lock_s_lock_func (pass=0, line=6671, file_name=0x55754a0d59f8 "/data/src/10.5/storage/innobase/btr/btr0cur.cc", lock=0x7f2513815388) at /data/src/10.5/storage/innobase/include/sync0rw.ic:644 #8 buf_page_mtr_lock (line=6671, file=0x55754a0d59f8 "/data/src/10.5/storage/innobase/btr/btr0cur.cc", mtr=0x7f25111f2c30, rw_latch=1, block=) at /data/src/10.5/storage/innobase/buf/buf0buf.cc:2985 #9 buf_page_get_low (page_id=..., zip_size=zip_size@entry=0, rw_latch=rw_latch@entry=1, guess=, mode=, file=, line=, mtr=, err=, allow_ibuf_merge=) at /data/src/10.5/storage/innobase/buf/buf0buf.cc:3571 #10 0x0000557549c38c7d in buf_page_get_gen (page_id=..., zip_size=zip_size@entry=0, rw_latch=rw_latch@entry=1, guess=guess@entry=0x0, mode=mode@entry=10, file=file@entry=0x55754a0d59f8 "/data/src/10.5/storage/innobase/btr/btr0cur.cc", line=6671, mtr=0x7f25111f2c30, err=0x7f25111f22dc, allow_ibuf_merge=false) at /data/src/10.5/storage/innobase/buf/buf0buf.cc:3640 #11 0x0000557549c16fd5 in btr_cur_open_at_rnd_pos_func (latch_mode=1, file=0x55754a0d59f8 "/data/src/10.5/storage/innobase/btr/btr0cur.cc", line=6671, mtr=0x7f25111f2c30, cursor=0x7f25111f22f0, index=) at /data/src/10.5/storage/innobase/btr/btr0cur.cc:2969 #12 btr_estimate_number_of_different_key_vals (index=index@entry=0x7f24f4015890) at /data/src/10.5/storage/innobase/btr/btr0cur.cc:6671 #13 0x0000557549c90a17 in dict_stats_update_transient_for_index (index=index@entry=0x7f24f4015890) at /data/src/10.5/storage/innobase/dict/dict0stats.cc:887 #14 0x0000557549c97b59 in dict_stats_update_transient (table=0x7f24f4013630) at /data/src/10.5/storage/innobase/dict/dict0stats.cc:945 #15 dict_stats_update (table=table@entry=0x7f24f4013630, stats_upd_option=) at /data/src/10.5/storage/innobase/dict/dict0stats.cc:3329 #16 0x0000557549aa3d01 in dict_stats_init (table=) at /data/src/10.5/storage/innobase/include/dict0stats.ic:165 #17 ha_innobase::open (this=0x7f24f400eae0, name=0x7f24f400c678 "./test/t1") at /data/src/10.5/storage/innobase/handler/ha_innodb.cc:5830 #18 0x000055754978c89a in handler::ha_open (this=0x7f24f400eae0, table_arg=table_arg@entry=0x7f24f400dce8, name=0x7f24f400c678 "./test/t1", mode=2, test_if_locked=test_if_locked@entry=18, mem_root=mem_root@entry=0x0, partitions_to_open=0x0) at /data/src/10.5/sql/handler.cc:2954 #19 0x000055754964a25c in open_table_from_share (thd=thd@entry=0x7f24f4000a98, share=share@entry=0x7f24f400c1e0, alias=alias@entry=0x7f24f400b828, db_stat=db_stat@entry=33, prgflag=prgflag@entry=8, ha_open_flags=18, outparam=, is_create_table=, partitions_to_open=) at /data/src/10.5/sql/table.cc:4186 #20 0x0000557549523769 in open_table (thd=thd@entry=0x7f24f4000a98, table_list=table_list@entry=0x7f24f400b7e0, ot_ctx=ot_ctx@entry=0x7f25111f4520) at /data/src/10.5/sql/sql_base.cc:1988 #21 0x000055754953b701 in open_purge_table (thd=thd@entry=0x7f24f4000a98, db=db@entry=0x7f25111f45b0 "test", dblen=, tb=tb@entry=0x7f25111f4680 "t1", tblen=) at /data/src/10.5/sql/sql_class.cc:4730 #22 0x0000557549a8dd4a in innodb_find_table_for_vc (thd=0x7f24f4000a98, table=0x7f24f4013630) at /data/src/10.5/storage/innobase/handler/ha_innodb.cc:20642 #23 0x0000557549a9b0c1 in innobase_allocate_row_for_vcol (thd=thd@entry=0x7f24f4000a98, index=index@entry=0x7f24f4015890, heap=heap@entry=0x7f25111f47d0, table=table@entry=0x7f25111f47e0, record=record@entry=0x7f25111f47e8, storage=storage@entry=0x7f25111f47d8) at /data/src/10.5/storage/innobase/handler/ha_innodb.cc:20785 #24 0x0000557549b98835 in row_vers_build_clust_v_col (row=row@entry=0x7f24f400b3b0, clust_index=clust_index@entry=0x7f24f4014cf0, index=index@entry=0x7f24f4015890, heap=0x7f24f400b338) at /data/src/10.5/storage/innobase/row/row0vers.cc:465 #25 0x0000557549b9b424 in row_vers_old_has_index_entry (also_curr=also_curr@entry=true, rec=0x7f2513cf807f "\200", mtr=mtr@entry=0x7f25111f4930, index=index@entry=0x7f24f4015890, ientry=ientry@entry=0x7f24f40145d0, roll_ptr=1125899927290647, trx_id=0) at /data/src/10.5/storage/innobase/row/row0vers.cc:929 #26 0x0000557549b7f8e1 in row_purge_poss_sec (node=node@entry=0x55754ce5fae8, index=index@entry=0x7f24f4015890, entry=entry@entry=0x7f24f40145d0, sec_pcur=sec_pcur@entry=0x7f25111f4e80, sec_mtr=sec_mtr@entry=0x7f25111f5100, is_tree=is_tree@entry=false) at /data/src/10.5/storage/innobase/row/row0purge.cc:245 #27 0x0000557549b7fdab in row_purge_remove_sec_if_poss_leaf (node=node@entry=0x55754ce5fae8, index=index@entry=0x7f24f4015890, entry=entry@entry=0x7f24f40145d0) at /data/src/10.5/storage/innobase/row/row0purge.cc:466 #28 0x0000557549b80cad in row_purge_remove_sec_if_poss (entry=0x7f24f40145d0, index=, node=0x55754ce5fae8) at /data/src/10.5/storage/innobase/row/row0purge.cc:568 #29 row_purge_del_mark (node=0x55754ce5fae8) at /data/src/10.5/storage/innobase/row/row0purge.cc:638 #30 row_purge_record_func (node=node@entry=0x55754ce5fae8, undo_rec=undo_rec@entry=0x55754ce6edd8 "", thr=thr@entry=0x55754ce5fa40, updated_extern=) at /data/src/10.5/storage/innobase/row/row0purge.cc:1048 #31 0x0000557549b81c54 in row_purge (thr=0x55754ce5fa40, undo_rec=0x55754ce6edd8 "", node=0x55754ce5fae8) at /data/src/10.5/storage/innobase/row/row0purge.cc:1109 #32 row_purge_step (thr=thr@entry=0x55754ce5fa40) at /data/src/10.5/storage/innobase/row/row0purge.cc:1158 #33 0x0000557549b36d1c in que_thr_step (thr=0x1e) at /data/src/10.5/storage/innobase/que/que0que.cc:947 #34 que_run_threads_low (thr=0x1e) at /data/src/10.5/storage/innobase/que/que0que.cc:1009 #35 que_run_threads (thr=thr@entry=0x55754ce5fa40) at /data/src/10.5/storage/innobase/que/que0que.cc:1049 #36 0x0000557549ba49b0 in srv_task_execute () at /data/src/10.5/storage/innobase/srv/srv0srv.cc:2030 #37 purge_worker_callback () at /data/src/10.5/storage/innobase/srv/srv0srv.cc:2195 #38 0x0000557549d285c2 in tpool::task_group::execute (this=0x55754b1db0c0 , t=0x55754b1bc860 ) at /data/src/10.5/tpool/task_group.cc:55 #39 0x0000557549d2747f in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd079b0) at /data/src/10.5/tpool/tpool_generic.cc:518 #40 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #41 0x00007f251f2bf4a4 in start_thread (arg=0x7f25111f6700) at pthread_create.c:456 #42 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 8 (Thread 0x7f25129f9700 (LWP 16831)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549d25675 in __gthread_cond_timedwait (__abs_timeout=0x7f25129f8de0, __mutex=, __cond=0x55754cd07a30) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871 #2 std::condition_variable::__wait_until_impl > > (__atime=..., __lock=..., this=0x55754cd07a30) at /usr/include/c++/6/condition_variable:166 #3 std::condition_variable::wait_until > > (__atime=..., __lock=..., this=0x55754cd07a30) at /usr/include/c++/6/condition_variable:106 #4 std::condition_variable::wait_for > (__rtime=..., __lock=..., this=0x55754cd07a30) at /usr/include/c++/6/condition_variable:138 #5 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x55754ccf7fa0, lk=..., thread_data=thread_data@entry=0x55754cd07a30) at /data/src/10.5/tpool/tpool_generic.cc:418 #6 0x0000557549d25bd0 in tpool::thread_pool_generic::get_task (this=this@entry=0x55754ccf7fa0, thread_var=thread_var@entry=0x55754cd07a30, t=t@entry=0x7f25129f8e88) at /data/src/10.5/tpool/tpool_generic.cc:471 #7 0x0000557549d2748d in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd07a30) at /data/src/10.5/tpool/tpool_generic.cc:516 #8 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #9 0x00007f251f2bf4a4 in start_thread (arg=0x7f25129f9700) at pthread_create.c:456 #10 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 7 (Thread 0x7f25119f7700 (LWP 16830)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007f251e9ac50c in std::condition_variable::wait(std::unique_lock&) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #2 0x0000557549d28b4b in tpool::waitable_task::wait (this=this@entry=0x55754b1bc860 , lk=...) at /data/src/10.5/tpool/task.cc:79 #3 0x0000557549d28bb4 in tpool::waitable_task::wait (this=this@entry=0x55754b1bc860 ) at /data/src/10.5/tpool/task.cc:85 #4 0x0000557549bc3161 in trx_purge_wait_for_workers_to_complete () at /data/src/10.5/storage/innobase/trx/trx0purge.cc:1256 #5 trx_purge (n_tasks=, truncate=) at /data/src/10.5/storage/innobase/trx/trx0purge.cc:1303 #6 0x0000557549ba4504 in srv_do_purge (n_total_purged=) at /data/src/10.5/storage/innobase/srv/srv0srv.cc:2125 #7 purge_coordinator_callback_low () at /data/src/10.5/storage/innobase/srv/srv0srv.cc:2212 #8 purge_coordinator_callback () at /data/src/10.5/storage/innobase/srv/srv0srv.cc:2241 #9 0x0000557549d285c2 in tpool::task_group::execute (this=0x55754b1db020 , t=0x55754b1daf80 ) at /data/src/10.5/tpool/task_group.cc:55 #10 0x0000557549d2747f in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd07ab0) at /data/src/10.5/tpool/tpool_generic.cc:518 #11 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #12 0x00007f251f2bf4a4 in start_thread (arg=0x7f25119f7700) at pthread_create.c:456 #13 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 6 (Thread 0x7f25121f8700 (LWP 16829)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549d25675 in __gthread_cond_timedwait (__abs_timeout=0x7f25121f7de0, __mutex=, __cond=0x55754cd07b30) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871 #2 std::condition_variable::__wait_until_impl > > (__atime=..., __lock=..., this=0x55754cd07b30) at /usr/include/c++/6/condition_variable:166 #3 std::condition_variable::wait_until > > (__atime=..., __lock=..., this=0x55754cd07b30) at /usr/include/c++/6/condition_variable:106 #4 std::condition_variable::wait_for > (__rtime=..., __lock=..., this=0x55754cd07b30) at /usr/include/c++/6/condition_variable:138 #5 tpool::thread_pool_generic::wait_for_tasks (this=this@entry=0x55754ccf7fa0, lk=..., thread_data=thread_data@entry=0x55754cd07b30) at /data/src/10.5/tpool/tpool_generic.cc:418 #6 0x0000557549d25bd0 in tpool::thread_pool_generic::get_task (this=this@entry=0x55754ccf7fa0, thread_var=thread_var@entry=0x55754cd07b30, t=t@entry=0x7f25121f7e88) at /data/src/10.5/tpool/tpool_generic.cc:471 #7 0x0000557549d2748d in tpool::thread_pool_generic::worker_main (this=0x55754ccf7fa0, thread_var=0x55754cd07b30) at /data/src/10.5/tpool/tpool_generic.cc:516 #8 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #9 0x00007f251f2bf4a4 in start_thread (arg=0x7f25121f8700) at pthread_create.c:456 #10 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 5 (Thread 0x7f25133ff700 (LWP 16827)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549b0dbe2 in os_event::timed_wait (this=this@entry=0x55754cd1c738, abstime=abstime@entry=0x7f25133fe950) at /data/src/10.5/storage/innobase/os/os0event.cc:275 #2 0x0000557549b0de31 in os_event::wait_time_low (this=0x55754cd1c738, time_in_usec=time_in_usec@entry=1000000, reset_sig_count=reset_sig_count@entry=2) at /data/src/10.5/storage/innobase/os/os0event.cc:385 #3 0x0000557549b0e12a in os_event_wait_time_low (event=, time_in_usec=time_in_usec@entry=1000000, reset_sig_count=reset_sig_count@entry=2) at /data/src/10.5/storage/innobase/os/os0event.cc:485 #4 0x0000557549c54ca4 in pc_sleep_if_needed (cur_time=1118458430, sig_count=2, next_loop_time=1118459430) at /data/src/10.5/storage/innobase/buf/buf0flu.cc:2309 #5 buf_flush_page_cleaner () at /data/src/10.5/storage/innobase/buf/buf0flu.cc:2591 #6 0x00007f251f2bf4a4 in start_thread (arg=0x7f25133ff700) at pthread_create.c:456 #7 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 4 (Thread 0x7f2518886700 (LWP 16826)): #0 0x00007f251ee7e6ca in ?? () from /lib/x86_64-linux-gnu/libaio.so.1 #1 0x0000557549d28ff5 in tpool::aio_linux::getevent_thread_routine (aio=0x55754ccf16a0) at /data/src/10.5/tpool/aio_linux.cc:53 #2 0x00007f251e9b1e6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #3 0x00007f251f2bf4a4 in start_thread (arg=0x7f2518886700) at pthread_create.c:456 #4 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 3 (Thread 0x7f251949d700 (LWP 16824)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x000055754997dc0c in inline_mysql_cond_timedwait (src_file=0x55754a07f8c0 "/data/src/10.5/storage/maria/ma_servicethread.c", src_line=116, abstime=0x7f251949cd90, mutex=0x55754b14bee0 , that=0x55754b14bea0 ) at /data/src/10.5/include/mysql/psi/mysql_thread.h:1257 #2 my_service_thread_sleep (control=control@entry=0x55754a886580 , sleep_time=) at /data/src/10.5/storage/maria/ma_servicethread.c:115 #3 0x0000557549974df9 in ma_checkpoint_background (arg=arg@entry=0x1e) at /data/src/10.5/storage/maria/ma_checkpoint.c:707 #4 0x00005575499ea9e1 in pfs_spawn_thread (arg=0x55754ccb13d8) at /data/src/10.5/storage/perfschema/pfs.cc:2201 #5 0x00007f251f2bf4a4 in start_thread (arg=0x7f251949d700) at pthread_create.c:456 #6 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 2 (Thread 0x7f251f6f7700 (LWP 16823)): #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225 #1 0x0000557549da471d in inline_mysql_cond_timedwait (that=0x55754b1f1f60 , mutex=0x55754b1f1fa0 , src_file=0x55754a0edff8 "/data/src/10.5/mysys/thr_timer.c", src_line=321, abstime=0x7f251f6f6e20) at /data/src/10.5/include/mysql/psi/mysql_thread.h:1257 #2 timer_handler (arg=arg@entry=0x0) at /data/src/10.5/mysys/thr_timer.c:321 #3 0x00005575499ea9e1 in pfs_spawn_thread (arg=0x55754cbfaf88) at /data/src/10.5/storage/perfschema/pfs.cc:2201 #4 0x00007f251f2bf4a4 in start_thread (arg=0x7f251f6f7700) at pthread_create.c:456 #5 0x00007f251e33dd0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97 Thread 1 (Thread 0x7f251f6d7bc0 (LWP 16822)): #0 0x00007f251e3348bd in poll () at ../sysdeps/unix/syscall-template.S:84 #1 0x00007f251e34e3be in __poll_chk (fds=, nfds=, timeout=, fdslen=) at poll_chk.c:27 #2 0x00005575494c5edf in poll (__timeout=-1, __nfds=2, __fds=0x7ffc53e636b0) at /usr/include/x86_64-linux-gnu/bits/poll2.h:41 #3 handle_connections_sockets () at /data/src/10.5/sql/mysqld.cc:6192 #4 0x00005575494c70f9 in mysqld_main (argc=, argv=) at /data/src/10.5/sql/mysqld.cc:5664 #5 0x00007f251e2752e1 in __libc_start_main (main=0x557549484150 , argc=23, argv=0x7ffc53e63ae8, init=, fini=, rtld_fini=, stack_end=0x7ffc53e63ad8) at ../csu/libc-start.c:291 #6 0x00005575494bb25a in _start ()