[root@dbn02 ~]# gdb --batch --eval-command="thread apply all bt" program $(pgrep -xn mysqld)
program: No such file or directory.
[New LWP 7674]
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[New LWP 7678]
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Missing separate debuginfo for target:/lib64/libsystemd.so.0
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/66/f5e9816e7ad3b419553f0b7a43ad9908abd044.debug
Missing separate debuginfo for target:/lib64/libpthread.so.0
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/db/0dd369a651ce8ac4c4362e4e820583b2fe0591.debug
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Missing separate debuginfo for target:/lib64/libaio.so.1
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/a9/603f5aaf8310e43cf365ad1e740275e19c5bda.debug
Missing separate debuginfo for target:/lib64/libz.so.1
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/91/9d7128d3d20b8904e76d7f7a35a4788eea5e0b.debug
Missing separate debuginfo for target:/lib64/libpcre.so.1
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/55/b822cf49fe91eec8d59b7163977914df045b19.debug
Missing separate debuginfo for target:/lib64/libjemalloc.so.2
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/3b/9c297fc953de25756c4fc5238e806ab05cda34.debug
Missing separate debuginfo for target:/lib64/libcrypt.so.1
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/e0/c61d0ba66ae908c07e9e17a3ea4bf22ed957bc.debug
Missing separate debuginfo for target:/lib64/libssl.so.10
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/0c/3c3999f04f0cb2beea7a9ffca8442fc2039c28.debug
Missing separate debuginfo for target:/lib64/libcrypto.so.10
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/12/049113e5f2e8208adf8eaa4d5228725d47cf0e.debug
Missing separate debuginfo for target:/lib64/libdl.so.2
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/48/416370d044a2fe93170a14161db26b39cda21a.debug
Missing separate debuginfo for target:/lib64/libstdc++.so.6
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/f2/f92b66b1def926e47f3202d25de38c2543e3b8.debug
Missing separate debuginfo for target:/lib64/libm.so.6
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/66/a314b193728cdec0448f2faca83a4b5a0743d0.debug
Missing separate debuginfo for target:/lib64/libc.so.6
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/d8/32e823945d682551ed590d2715848ed6100239.debug
Missing separate debuginfo for target:/lib64/ld-linux-x86-64.so.2
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/64/f57d0af32dbfd0f0096a0e86f4af3d8a8f2c0f.debug
Missing separate debuginfo for target:/lib64/libresolv.so.2
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/36/0fe94e48717d07e4eb6af109b13f6513e75ed0.debug
Missing separate debuginfo for target:/lib64/libselinux.so.1
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/4e/80d147759a2b757df396c40b079e8ea9ce2629.debug
Missing separate debuginfo for target:/lib64/libcap.so.2
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/9a/d6870bd8403205830a4333a7fac559ca4e912c.debug
Missing separate debuginfo for target:/lib64/librt.so.1
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/7c/1b7d611bcff0d27a259b428a1d3eda627a76bf.debug
Missing separate debuginfo for target:/lib64/liblzma.so.5
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/02/a6c8ce81eab889bf04edc75e3313cb742d790f.debug
Missing separate debuginfo for target:/lib64/liblz4.so.1
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/21/5763c94b4d9929def75fbaa9dc6a06217721c4.debug
Missing separate debuginfo for target:/lib64/libgcrypt.so.20
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/1a/f0a93c80bdc7eee5e428b26a4f8f37b11e0b6a.debug
Missing separate debuginfo for target:/lib64/libgpg-error.so.0
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/02/0c483c5773451ff8582728bf3fb8d08d668caf.debug
Missing separate debuginfo for target:/lib64/libgcc_s.so.1
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/45/23a29e2c5d4c4ae5cc4ffec27ad8c7cfce310b.debug
Missing separate debuginfo for target:/lib64/libfreebl3.so
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/e3/c72da638bbabe6ff1e2a0903e2e3ead9e93577.debug
Missing separate debuginfo for target:/lib64/libgssapi_krb5.so.2
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/7f/2fda3c776a6259cd89390381b4a105c1c45cef.debug
Missing separate debuginfo for target:/lib64/libkrb5.so.3
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/72/ca3da6e1e1bbcfad792f7059d9eddf7d8c5cc0.debug
Missing separate debuginfo for target:/lib64/libcom_err.so.2
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/18/7a3021ee64da2de47e16ea6c4e9e28ba893af9.debug
Missing separate debuginfo for target:/lib64/libk5crypto.so.3
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/ef/0003573f30e39fafbfbe1a99df7dc76c3b7cb7.debug
Missing separate debuginfo for target:/lib64/libkrb5support.so.0
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/fa/35c1a46101d5c899b56d46c58ddb6830532934.debug
Missing separate debuginfo for target:/lib64/libkeyutils.so.1
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/83/b5dc698c4fbf60febe682891f6f423fcb91479.debug
Missing separate debuginfo for target:/lib64/libnss_files.so.2
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/ee/a70f1d4a63963cf34b14db50f0a5e384264eb1.debug
Missing separate debuginfo for target:/usr/lib64/galera/libgalera_smm.so
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/d3/be7980da0931e226b2625206dce59f58fa15ba.debug
Missing separate debuginfo for target:/lib64/libnss_dns.so.2
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/22/35a08d216e7383b2fab8d58e248ef64430a8c3.debug
Missing separate debuginfo for target:/usr/lib64/gssproxy/proxymech.so
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/fd/66a722e4cbf0773b48cd22b615ad44832394f1.debug
Missing separate debuginfo for target:/lib64/libgssrpc.so.4
Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/ad/7973a0cc8dcc032383be4cf432e6ce09a4540e.debug
0x00007f91ee44ff3d in poll () from target:/lib64/libc.so.6

Thread 55 (Thread 0x7f90ea93fb00 (LWP 8908)):
#0  0x00007f91f0196480 in pthread_cond_wait@@GLIBC_2.3.2 () from target:/lib64/libpthread.so.0
#1  0x000055bd02ae77b3 in inline_mysql_cond_wait (that=<optimized out>, mutex=<optimized out>, src_file=0x55bd0320d0e0 "/builddir/build/BUILD/mariadb-10.1.26/sql/slave.cc", src_line=336) at /usr/src/debug/mariadb-10.1.26/include/mysql/psi/mysql_thread.h:1165
#2  handle_slave_background (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/sql/slave.cc:336
#3  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#4  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 54 (Thread 0x7f91eb28ab00 (LWP 8907)):
#0  0x00007f91f019a1d6 in sigwait () from target:/lib64/libpthread.so.0
#1  0x000055bd02acd77b in signal_hand (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/sql/mysqld.cc:3401
#2  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#3  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 53 (Thread 0x7f90153f7700 (LWP 8906)):
#0  0x00007f91ee451c93 in select () from target:/lib64/libc.so.6
#1  0x000055bd02fedbef in os_thread_sleep (tm=tm@entry=1000000) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0thread.cc:307
#2  0x000055bd030c3a0e in btr_defragment_thread () at /usr/src/debug/mariadb-10.1.26/storage/xtradb/btr/btr0defragment.cc:758
#3  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#4  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 52 (Thread 0x7f9015bf8700 (LWP 8905)):
#0  0x00007f91f0196480 in pthread_cond_wait@@GLIBC_2.3.2 () from target:/lib64/libpthread.so.0
#1  0x000055bd02fed28b in os_cond_wait (fast_mutex=0x7f91ebc7b4b0, cond=0x7f91ebc7b4e8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0sync.cc:196
#2  os_event_wait_low (event=0x7f91ebc7b4b0, reset_sig_count=1, reset_sig_count@entry=0) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0sync.cc:477
#3  0x000055bd030d7ff7 in buf_dump_thread () at /usr/src/debug/mariadb-10.1.26/storage/xtradb/buf/buf0dump.cc:701
#4  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#5  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 51 (Thread 0x7f90163f9700 (LWP 8903)):
#0  0x00007f91ee451c93 in select () from target:/lib64/libc.so.6
#1  0x000055bd02fedbef in os_thread_sleep (tm=tm@entry=1000000) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0thread.cc:307
#2  0x000055bd030e1a6f in page_cleaner_sleep_if_needed (next_loop_time=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/buf/buf0flu.cc:2668
#3  buf_flush_lru_manager_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/buf/buf0flu.cc:2969
#4  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#5  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 50 (Thread 0x7f9016bfa700 (LWP 8902)):
#0  0x00007f91ee451c93 in select () from target:/lib64/libc.so.6
#1  0x000055bd02fedbef in os_thread_sleep (tm=tm@entry=1000000) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0thread.cc:307
#2  0x000055bd030e0847 in page_cleaner_sleep_if_needed (next_loop_time=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/buf/buf0flu.cc:2668
#3  buf_flush_page_cleaner_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/buf/buf0flu.cc:2809
#4  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#5  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 49 (Thread 0x7f90173fb700 (LWP 8901)):
#0  0x00007f91f0196480 in pthread_cond_wait@@GLIBC_2.3.2 () from target:/lib64/libpthread.so.0
#1  0x000055bd02fed28b in os_cond_wait (fast_mutex=0x7f91ebc7b360, cond=0x7f91ebc7b398) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0sync.cc:196
#2  os_event_wait_low (event=0x7f91ebc7b360, reset_sig_count=reset_sig_count@entry=118) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0sync.cc:477
#3  0x000055bd0305ed28 in srv_resume_thread (timeout_usec=0, wait=true, sig_count=118, slot=0x55bd042199a8 <srv_sys+488>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0srv.cc:1088
#4  srv_purge_coordinator_suspend (rseg_history_len=<optimized out>, slot=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0srv.cc:3483
#5  srv_purge_coordinator_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0srv.cc:3574
#6  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#7  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 48 (Thread 0x7f9017bfc700 (LWP 8900)):
#0  0x00007f91f0196829 in pthread_cond_timedwait@@GLIBC_2.3.2 () from target:/lib64/libpthread.so.0
#1  0x000055bd02fed3e6 in os_cond_wait_timed (abstime=0x7f9017bfbbd0, fast_mutex=0x7f901ac82c50, cond=0x7f901ac82c88) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0sync.cc:159
#2  os_event_wait_time_low (event=0x7f901ac82c50, time_in_usec=time_in_usec@entry=5000000, reset_sig_count=reset_sig_count@entry=1) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0sync.cc:591
#3  0x000055bd03091563 in ib_wqueue_timedwait (wq=wq@entry=0x7f91ebc694a8, wait_in_usecs=wait_in_usecs@entry=5000000) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/ut/ut0wqueue.cc:154
#4  0x000055bd0315ccce in fts_optimize_thread (arg=0x7f91ebc694a8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fts/fts0opt.cc:3060
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 47 (Thread 0x7f90183fd700 (LWP 8899)):
#0  0x00007f91f0196829 in pthread_cond_timedwait@@GLIBC_2.3.2 () from target:/lib64/libpthread.so.0
#1  0x000055bd02fed3e6 in os_cond_wait_timed (abstime=0x7f90183fcc10, fast_mutex=0x7f91ebc7de40, cond=0x7f91ebc7de78) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0sync.cc:159
#2  os_event_wait_time_low (event=0x7f91ebc7de40, time_in_usec=time_in_usec@entry=10000000, reset_sig_count=30, reset_sig_count@entry=0) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0sync.cc:591
#3  0x000055bd0311ca23 in dict_stats_thread () at /usr/src/debug/mariadb-10.1.26/storage/xtradb/dict/dict0stats_bg.cc:553
#4  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#5  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 46 (Thread 0x7f9018bfe700 (LWP 8898)):
#0  0x00007f91ee451c93 in select () from target:/lib64/libc.so.6
#1  0x000055bd02fedbef in os_thread_sleep (tm=tm@entry=1000000) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0thread.cc:307
#2  0x000055bd0305d280 in srv_master_sleep () at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0srv.cc:3117
#3  srv_master_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0srv.cc:3167
#4  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#5  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 45 (Thread 0x7f901a9ff700 (LWP 8897)):
#0  0x00007f91f0196829 in pthread_cond_timedwait@@GLIBC_2.3.2 () from target:/lib64/libpthread.so.0
#1  0x000055bd02fed3e6 in os_cond_wait_timed (abstime=0x7f901a9febe0, fast_mutex=0x7f91ebc7b3d0, cond=0x7f91ebc7b408) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0sync.cc:159
#2  os_event_wait_time_low (event=0x7f91ebc7b3d0, time_in_usec=time_in_usec@entry=1000000, reset_sig_count=1) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0sync.cc:591
#3  0x000055bd0305bbcd in srv_error_monitor_thread () at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0srv.cc:2425
#4  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#5  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 44 (Thread 0x7f90193ff700 (LWP 8896)):
#0  0x00007f91f0196829 in pthread_cond_timedwait@@GLIBC_2.3.2 () from target:/lib64/libpthread.so.0
#1  0x000055bd02fed3e6 in os_cond_wait_timed (abstime=0x7f90193fec20, fast_mutex=0x7f91ebc7dba0, cond=0x7f91ebc7dbd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0sync.cc:159
#2  os_event_wait_time_low (event=event@entry=0x7f91ebc7dba0, time_in_usec=time_in_usec@entry=1000000, reset_sig_count=reset_sig_count@entry=1) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0sync.cc:591
#3  0x000055bd02fbbc94 in lock_wait_timeout_thread () at /usr/src/debug/mariadb-10.1.26/storage/xtradb/lock/lock0wait.cc:536
#4  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#5  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 43 (Thread 0x7f901b7ff700 (LWP 8860)):
#0  0x00007f91f0196829 in pthread_cond_timedwait@@GLIBC_2.3.2 () from target:/lib64/libpthread.so.0
#1  0x000055bd02fed3e6 in os_cond_wait_timed (abstime=0x7f901b7fec20, fast_mutex=0x7f91ebc7b440, cond=0x7f91ebc7b478) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0sync.cc:159
#2  os_event_wait_time_low (event=0x7f91ebc7b440, time_in_usec=time_in_usec@entry=5000000, reset_sig_count=1) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0sync.cc:591
#3  0x000055bd0305b6f3 in srv_monitor_thread () at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0srv.cc:2184
#4  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#5  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 42 (Thread 0x7f901efde700 (LWP 8859)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19820) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=33, message1=message1@entry=0x7f901efddcc0, message2=message2@entry=0x7f901efddcc8, type=type@entry=0x7f901efddcd0, space_id=space_id@entry=0x7f901efddcd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=33) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 41 (Thread 0x7f901f7df700 (LWP 8858)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19820) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=32, message1=message1@entry=0x7f901f7decc0, message2=message2@entry=0x7f901f7decc8, type=type@entry=0x7f901f7decd0, space_id=space_id@entry=0x7f901f7decd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=32) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 40 (Thread 0x7f901ffe0700 (LWP 8857)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19820) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=31, message1=message1@entry=0x7f901ffdfcc0, message2=message2@entry=0x7f901ffdfcc8, type=type@entry=0x7f901ffdfcd0, space_id=space_id@entry=0x7f901ffdfcd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=31) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 39 (Thread 0x7f90207e1700 (LWP 8856)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19820) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=30, message1=message1@entry=0x7f90207e0cc0, message2=message2@entry=0x7f90207e0cc8, type=type@entry=0x7f90207e0cd0, space_id=space_id@entry=0x7f90207e0cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=30) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 38 (Thread 0x7f9020fe2700 (LWP 8855)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19820) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=29, message1=message1@entry=0x7f9020fe1cc0, message2=message2@entry=0x7f9020fe1cc8, type=type@entry=0x7f9020fe1cd0, space_id=space_id@entry=0x7f9020fe1cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=29) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 37 (Thread 0x7f90217e3700 (LWP 8854)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19820) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=28, message1=message1@entry=0x7f90217e2cc0, message2=message2@entry=0x7f90217e2cc8, type=type@entry=0x7f90217e2cd0, space_id=space_id@entry=0x7f90217e2cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=28) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 36 (Thread 0x7f9021fe4700 (LWP 8853)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19820) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=27, message1=message1@entry=0x7f9021fe3cc0, message2=message2@entry=0x7f9021fe3cc8, type=type@entry=0x7f9021fe3cd0, space_id=space_id@entry=0x7f9021fe3cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=27) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 35 (Thread 0x7f90227e5700 (LWP 8852)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19820) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=26, message1=message1@entry=0x7f90227e4cc0, message2=message2@entry=0x7f90227e4cc8, type=type@entry=0x7f90227e4cd0, space_id=space_id@entry=0x7f90227e4cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=26) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 34 (Thread 0x7f9022fe6700 (LWP 8851)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19820) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=25, message1=message1@entry=0x7f9022fe5cc0, message2=message2@entry=0x7f9022fe5cc8, type=type@entry=0x7f9022fe5cd0, space_id=space_id@entry=0x7f9022fe5cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=25) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 33 (Thread 0x7f90237e7700 (LWP 8850)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19820) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=24, message1=message1@entry=0x7f90237e6cc0, message2=message2@entry=0x7f90237e6cc8, type=type@entry=0x7f90237e6cd0, space_id=space_id@entry=0x7f90237e6cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=24) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 32 (Thread 0x7f9023fe8700 (LWP 8849)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19820) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=23, message1=message1@entry=0x7f9023fe7cc0, message2=message2@entry=0x7f9023fe7cc8, type=type@entry=0x7f9023fe7cd0, space_id=space_id@entry=0x7f9023fe7cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=23) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 31 (Thread 0x7f90247e9700 (LWP 8848)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19820) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=22, message1=message1@entry=0x7f90247e8cc0, message2=message2@entry=0x7f90247e8cc8, type=type@entry=0x7f90247e8cd0, space_id=space_id@entry=0x7f90247e8cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=22) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 30 (Thread 0x7f9024fea700 (LWP 8847)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19820) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=21, message1=message1@entry=0x7f9024fe9cc0, message2=message2@entry=0x7f9024fe9cc8, type=type@entry=0x7f9024fe9cd0, space_id=space_id@entry=0x7f9024fe9cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=21) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 29 (Thread 0x7f90257eb700 (LWP 8846)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19820) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=20, message1=message1@entry=0x7f90257eacc0, message2=message2@entry=0x7f90257eacc8, type=type@entry=0x7f90257eacd0, space_id=space_id@entry=0x7f90257eacd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=20) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 28 (Thread 0x7f9025fec700 (LWP 8845)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19820) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=19, message1=message1@entry=0x7f9025febcc0, message2=message2@entry=0x7f9025febcc8, type=type@entry=0x7f9025febcd0, space_id=space_id@entry=0x7f9025febcd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=19) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 27 (Thread 0x7f90267ed700 (LWP 8844)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19820) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=18, message1=message1@entry=0x7f90267eccc0, message2=message2@entry=0x7f90267eccc8, type=type@entry=0x7f90267eccd0, space_id=space_id@entry=0x7f90267eccd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=18) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 26 (Thread 0x7f9026fee700 (LWP 8843)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19780) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=17, message1=message1@entry=0x7f9026fedcc0, message2=message2@entry=0x7f9026fedcc8, type=type@entry=0x7f9026fedcd0, space_id=space_id@entry=0x7f9026fedcd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=17) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 25 (Thread 0x7f90277ef700 (LWP 8842)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19780) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=16, message1=message1@entry=0x7f90277eecc0, message2=message2@entry=0x7f90277eecc8, type=type@entry=0x7f90277eecd0, space_id=space_id@entry=0x7f90277eecd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=16) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 24 (Thread 0x7f9027ff0700 (LWP 8841)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19780) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=15, message1=message1@entry=0x7f9027fefcc0, message2=message2@entry=0x7f9027fefcc8, type=type@entry=0x7f9027fefcd0, space_id=space_id@entry=0x7f9027fefcd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=15) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 23 (Thread 0x7f90287f1700 (LWP 8840)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19780) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=14, message1=message1@entry=0x7f90287f0cc0, message2=message2@entry=0x7f90287f0cc8, type=type@entry=0x7f90287f0cd0, space_id=space_id@entry=0x7f90287f0cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=14) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 22 (Thread 0x7f9028ff2700 (LWP 8839)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19780) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=13, message1=message1@entry=0x7f9028ff1cc0, message2=message2@entry=0x7f9028ff1cc8, type=type@entry=0x7f9028ff1cd0, space_id=space_id@entry=0x7f9028ff1cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=13) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 21 (Thread 0x7f90297f3700 (LWP 8838)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19780) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=12, message1=message1@entry=0x7f90297f2cc0, message2=message2@entry=0x7f90297f2cc8, type=type@entry=0x7f90297f2cd0, space_id=space_id@entry=0x7f90297f2cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=12) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 20 (Thread 0x7f9029ff4700 (LWP 8837)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19780) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=11, message1=message1@entry=0x7f9029ff3cc0, message2=message2@entry=0x7f9029ff3cc8, type=type@entry=0x7f9029ff3cd0, space_id=space_id@entry=0x7f9029ff3cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=11) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 19 (Thread 0x7f902a7f5700 (LWP 8836)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19780) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=10, message1=message1@entry=0x7f902a7f4cc0, message2=message2@entry=0x7f902a7f4cc8, type=type@entry=0x7f902a7f4cd0, space_id=space_id@entry=0x7f902a7f4cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=10) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 18 (Thread 0x7f902aff6700 (LWP 8835)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19780) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=9, message1=message1@entry=0x7f902aff5cc0, message2=message2@entry=0x7f902aff5cc8, type=type@entry=0x7f902aff5cd0, space_id=space_id@entry=0x7f902aff5cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=9) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 17 (Thread 0x7f902b7f7700 (LWP 8834)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19780) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=8, message1=message1@entry=0x7f902b7f6cc0, message2=message2@entry=0x7f902b7f6cc8, type=type@entry=0x7f902b7f6cd0, space_id=space_id@entry=0x7f902b7f6cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 16 (Thread 0x7f902bff8700 (LWP 8833)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19780) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=7, message1=message1@entry=0x7f902bff7cc0, message2=message2@entry=0x7f902bff7cc8, type=type@entry=0x7f902bff7cd0, space_id=space_id@entry=0x7f902bff7cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=7) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 15 (Thread 0x7f902c7f9700 (LWP 8832)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19780) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=6, message1=message1@entry=0x7f902c7f8cc0, message2=message2@entry=0x7f902c7f8cc8, type=type@entry=0x7f902c7f8cd0, space_id=space_id@entry=0x7f902c7f8cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=6) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 14 (Thread 0x7f902cffa700 (LWP 8831)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19780) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=5, message1=message1@entry=0x7f902cff9cc0, message2=message2@entry=0x7f902cff9cc8, type=type@entry=0x7f902cff9cd0, space_id=space_id@entry=0x7f902cff9cd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=5) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 13 (Thread 0x7f902d7fb700 (LWP 8830)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19780) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=4, message1=message1@entry=0x7f902d7facc0, message2=message2@entry=0x7f902d7facc8, type=type@entry=0x7f902d7facd0, space_id=space_id@entry=0x7f902d7facd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=4) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 12 (Thread 0x7f902dffc700 (LWP 8829)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19780) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=3, message1=message1@entry=0x7f902dffbcc0, message2=message2@entry=0x7f902dffbcc8, type=type@entry=0x7f902dffbcd0, space_id=space_id@entry=0x7f902dffbcd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=3) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 11 (Thread 0x7f902e7fd700 (LWP 8828)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19780) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=2, message1=message1@entry=0x7f902e7fccc0, message2=message2@entry=0x7f902e7fccc8, type=type@entry=0x7f902e7fccd0, space_id=space_id@entry=0x7f902e7fccd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=2) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 10 (Thread 0x7f902effe700 (LWP 8827)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd19730) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=1, message1=message1@entry=0x7f902effdcc0, message2=message2@entry=0x7f902effdcc8, type=type@entry=0x7f902effdcd0, space_id=space_id@entry=0x7f902effdcd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=1) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 9 (Thread 0x7f902f7ff700 (LWP 8826)):
#0  0x00007f91eff87654 in __io_getevents_0_4 () from target:/lib64/libaio.so.1
#1  0x000055bd02fea9f7 in os_aio_linux_collect (seg_size=256, segment=<optimized out>, array=0x7f91ebd196e0) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5388
#2  os_aio_linux_handle (global_seg=global_seg@entry=0, message1=message1@entry=0x7f902f7fecc0, message2=message2@entry=0x7f902f7fecc8, type=type@entry=0x7f902f7fecd0, space_id=space_id@entry=0x7f902f7fecd8) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/os/os0file.cc:5542
#3  0x000055bd03122d1a in fil_aio_wait (segment=segment@entry=0) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/fil/fil0fil.cc:6502
#4  0x000055bd0305f680 in io_handler_thread (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/xtradb/srv/srv0start.cc:586
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 8 (Thread 0x7f90e61ff700 (LWP 8825)):
#0  0x00007f91f0196829 in pthread_cond_timedwait@@GLIBC_2.3.2 () from target:/lib64/libpthread.so.0
#1  0x000055bd02e8b3cf in inline_mysql_cond_timedwait (src_file=0x55bd03295930 "/builddir/build/BUILD/mariadb-10.1.26/storage/maria/ma_servicethread.c", src_line=116, abstime=0x7f90e61fec00, mutex=0x55bd041eb1c0 <LOCK_checkpoint>, that=0x55bd041eb180 <COND_checkpoint>) at /usr/src/debug/mariadb-10.1.26/include/mysql/psi/mysql_thread.h:1202
#2  my_service_thread_sleep (control=control@entry=0x55bd0393aea0 <checkpoint_control>, sleep_time=<optimized out>) at /usr/src/debug/mariadb-10.1.26/storage/maria/ma_servicethread.c:115
#3  0x000055bd02e82d68 in ma_checkpoint_background (arg=0x1e) at /usr/src/debug/mariadb-10.1.26/storage/maria/ma_checkpoint.c:708
#4  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#5  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 7 (Thread 0x7f91f04dcb00 (LWP 7679)):
#0  0x00007f91f0196480 in pthread_cond_wait@@GLIBC_2.3.2 () from target:/lib64/libpthread.so.0
#1  0x00007f91ea9bd66e in gu_fifo_get_head () from target:/usr/lib64/galera/libgalera_smm.so
#2  0x00007f91eaaf3583 in gcs_recv(gcs_conn*, gcs_action*) () from target:/usr/lib64/galera/libgalera_smm.so
#3  0x00007f91eab3df2e in galera::GcsActionSource::process(void*, bool&) () from target:/usr/lib64/galera/libgalera_smm.so
#4  0x00007f91eab62f5b in galera::ReplicatorSMM::async_recv(void*) () from target:/usr/lib64/galera/libgalera_smm.so
#5  0x00007f91eab7d6bb in galera_recv () from target:/usr/lib64/galera/libgalera_smm.so
#6  0x000055bd02ca9ea7 in wsrep_replication_process (thd=0x7f90e6414e08) at /usr/src/debug/mariadb-10.1.26/sql/wsrep_thd.cc:360
#7  0x000055bd02c99495 in start_wsrep_THD (arg=0x55bd02ca9e40 <wsrep_replication_process(THD*)>) at /usr/src/debug/mariadb-10.1.26/sql/wsrep_mysqld.cc:1855
#8  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#9  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 6 (Thread 0x7f91f0526b00 (LWP 7678)):
#0  0x00007f91f0196480 in pthread_cond_wait@@GLIBC_2.3.2 () from target:/lib64/libpthread.so.0
#1  0x000055bd02caabbb in inline_mysql_cond_wait (src_file=0x55bd032348b0 "/builddir/build/BUILD/mariadb-10.1.26/sql/wsrep_thd.cc", src_line=471, mutex=<optimized out>, that=<optimized out>) at /usr/src/debug/mariadb-10.1.26/include/mysql/psi/mysql_thread.h:1165
#2  wsrep_rollback_process (thd=0x7f90e6614108) at /usr/src/debug/mariadb-10.1.26/sql/wsrep_thd.cc:471
#3  0x000055bd02c99495 in start_wsrep_THD (arg=0x55bd02caa4e0 <wsrep_rollback_process(THD*)>) at /usr/src/debug/mariadb-10.1.26/sql/wsrep_mysqld.cc:1855
#4  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#5  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 5 (Thread 0x7f90e73fe700 (LWP 7677)):
#0  0x00007f91f0196480 in pthread_cond_wait@@GLIBC_2.3.2 () from target:/lib64/libpthread.so.0
#1  0x00007f91eaaf8ee8 in gcomm_recv(gcs_backend*, gcs_recv_msg*, long long) () from target:/usr/lib64/galera/libgalera_smm.so
#2  0x00007f91eaaef948 in gcs_core_recv(gcs_core*, gcs_act_rcvd*, long long) () from target:/usr/lib64/galera/libgalera_smm.so
#3  0x00007f91eaaf546a in gcs_recv_thread(void*) () from target:/usr/lib64/galera/libgalera_smm.so
#4  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#5  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 4 (Thread 0x7f90e7bff700 (LWP 7676)):
#0  0x00007f91ee45c473 in epoll_wait () from target:/lib64/libc.so.6
#1  0x00007f91eaae612d in asio::detail::epoll_reactor::run(bool, asio::detail::op_queue<asio::detail::task_io_service_operation>&) () from target:/usr/lib64/galera/libgalera_smm.so
#2  0x00007f91eaae0543 in gcomm::AsioProtonet::event_loop(gu::datetime::Period const&) () from target:/usr/lib64/galera/libgalera_smm.so
#3  0x00007f91eaafb5b9 in GCommConn::run() () from target:/usr/lib64/galera/libgalera_smm.so
#4  0x00007f91eab043b9 in GCommConn::run_fn(void*) () from target:/usr/lib64/galera/libgalera_smm.so
#5  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#6  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 3 (Thread 0x7f90ea5ff700 (LWP 7675)):
#0  0x00007f91f0196480 in pthread_cond_wait@@GLIBC_2.3.2 () from target:/lib64/libpthread.so.0
#1  0x00007f91eab31206 in galera::ServiceThd::thd_func(void*) () from target:/usr/lib64/galera/libgalera_smm.so
#2  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#3  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 2 (Thread 0x7f91ebbff700 (LWP 7674)):
#0  0x00007f91f0196829 in pthread_cond_timedwait@@GLIBC_2.3.2 () from target:/lib64/libpthread.so.0
#1  0x000055bd031bb3da in inline_mysql_cond_timedwait (that=0x55bd04237da0 <COND_timer>, mutex=0x55bd04237de0 <LOCK_timer>, src_file=0x55bd032ee708 "/builddir/build/BUILD/mariadb-10.1.26/mysys/thr_timer.c", src_line=292, abstime=0x7f91ebbfec90) at /usr/src/debug/mariadb-10.1.26/include/mysql/psi/mysql_thread.h:1202
#2  timer_handler (arg=<optimized out>) at /usr/src/debug/mariadb-10.1.26/mysys/thr_timer.c:292
#3  0x00007f91f019073a in start_thread () from target:/lib64/libpthread.so.0
#4  0x00007f91ee45be7f in clone () from target:/lib64/libc.so.6

Thread 1 (Thread 0x7f91f0528940 (LWP 7672)):
#0  0x00007f91ee44ff3d in poll () from target:/lib64/libc.so.6
#1  0x000055bd02ad01ef in poll (__timeout=-1, __nfds=2, __fds=0x7fff73e41a10) at /usr/include/bits/poll2.h:41
#2  handle_connections_sockets () at /usr/src/debug/mariadb-10.1.26/sql/mysqld.cc:6493
#3  0x000055bd02ad8024 in mysqld_main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/mariadb-10.1.26/sql/mysqld.cc:5918
#4  0x00007f91ee374431 in __libc_start_main () from target:/lib64/libc.so.6
#5  0x000055bd02acb0da in _start ()