Stack trace:

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f7c74a3974d in poll () at ../sysdeps/unix/syscall-template.S:84

Thread 41 (Thread 0x7f7c541aa700 (LWP 9175)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000000000d18c3f in Per_thread_connection_handler::block_until_new_connection() ()
#2  0x0000000000d18e71 in handle_connection ()
#3  0x00000000011fd844 in pfs_spawn_thread ()
#4  0x00007f7c755b06ba in start_thread (arg=0x7f7c541aa700) at pthread_create.c:333
#5  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 40 (Thread 0x7f7c541db700 (LWP 9174)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000000000d18c3f in Per_thread_connection_handler::block_until_new_connection() ()
#2  0x0000000000d18e71 in handle_connection ()
#3  0x00000000011fd844 in pfs_spawn_thread ()
#4  0x00007f7c755b06ba in start_thread (arg=0x7f7c541db700) at pthread_create.c:333
#5  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 39 (Thread 0x7f7c5420c700 (LWP 9173)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000000000d18c3f in Per_thread_connection_handler::block_until_new_connection() ()
#2  0x0000000000d18e71 in handle_connection ()
#3  0x00000000011fd844 in pfs_spawn_thread ()
#4  0x00007f7c755b06ba in start_thread (arg=0x7f7c5420c700) at pthread_create.c:333
#5  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 38 (Thread 0x7f7c5423d700 (LWP 9172)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000000000d18c3f in Per_thread_connection_handler::block_until_new_connection() ()
#2  0x0000000000d18e71 in handle_connection ()
#3  0x00000000011fd844 in pfs_spawn_thread ()
#4  0x00007f7c755b06ba in start_thread (arg=0x7f7c5423d700) at pthread_create.c:333
#5  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 37 (Thread 0x7f7c5426e700 (LWP 8702)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000000000d18c3f in Per_thread_connection_handler::block_until_new_connection() ()
#2  0x0000000000d18e71 in handle_connection ()
#3  0x00000000011fd844 in pfs_spawn_thread ()
#4  0x00007f7c755b06ba in start_thread (arg=0x7f7c5426e700) at pthread_create.c:333
#5  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 36 (Thread 0x7f7c5429f700 (LWP 8700)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000000000d18c3f in Per_thread_connection_handler::block_until_new_connection() ()
#2  0x0000000000d18e71 in handle_connection ()
#3  0x00000000011fd844 in pfs_spawn_thread ()
#4  0x00007f7c755b06ba in start_thread (arg=0x7f7c5429f700) at pthread_create.c:333
#5  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 35 (Thread 0x7f7c542d0700 (LWP 8560)):
#0  0x0000000000bf6dc0 in close_tables_for_reopen(THD*, TABLE_LIST**, MDL_savepoint const&) ()
#1  0x0000000000bfb5fa in open_tables(THD*, TABLE_LIST**, unsigned int*, unsigned int, Prelocking_strategy*) ()
#2  0x0000000000bfc2c9 in open_tables_for_query(THD*, TABLE_LIST*, unsigned int) ()
#3  0x0000000000753c55 in ?? ()
#4  0x0000000000c51f2b in mysql_execute_command(THD*, bool) ()
#5  0x0000000000c5447d in mysql_parse(THD*, Parser_state*) ()
#6  0x0000000000c555ba in dispatch_command(THD*, COM_DATA const*, enum_server_command) ()
#7  0x0000000000c56a77 in do_command(THD*) ()
#8  0x0000000000d18fc0 in handle_connection ()
#9  0x00000000011fd844 in pfs_spawn_thread ()
#10 0x00007f7c755b06ba in start_thread (arg=0x7f7c542d0700) at pthread_create.c:333
#11 0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 34 (Thread 0x7f7c54301700 (LWP 8559)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000000000d18c3f in Per_thread_connection_handler::block_until_new_connection() ()
#2  0x0000000000d18e71 in handle_connection ()
#3  0x00000000011fd844 in pfs_spawn_thread ()
#4  0x00007f7c755b06ba in start_thread (arg=0x7f7c54301700) at pthread_create.c:333
#5  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 33 (Thread 0x7f7c54332700 (LWP 8557)):
#0  0x00007f7c74a3974d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x000000000127140e in vio_io_wait ()
#2  0x00000000012714c8 in vio_socket_io_wait ()
#3  0x00000000012715c2 in vio_read ()
#4  0x0000000000ba4583 in ?? ()
#5  0x0000000000ba4883 in ?? ()
#6  0x0000000000ba5734 in my_net_read ()
#7  0x0000000000bb1adc in Protocol_classic::get_command(COM_DATA*, enum_server_command*) ()
#8  0x0000000000c56970 in do_command(THD*) ()
#9  0x0000000000d18fc0 in handle_connection ()
#10 0x00000000011fd844 in pfs_spawn_thread ()
#11 0x00007f7c755b06ba in start_thread (arg=0x7f7c54332700) at pthread_create.c:333
#12 0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 32 (Thread 0x7f7c5c037700 (LWP 8550)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000000000d18c3f in Per_thread_connection_handler::block_until_new_connection() ()
#2  0x0000000000d18e71 in handle_connection ()
#3  0x00000000011fd844 in pfs_spawn_thread ()
#4  0x00007f7c755b06ba in start_thread (arg=0x7f7c5c037700) at pthread_create.c:333
#5  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 31 (Thread 0x7f7c5c068700 (LWP 8549)):
#0  0x00007f7c74a3974d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x000000000127140e in vio_io_wait ()
#2  0x00000000012714c8 in vio_socket_io_wait ()
#3  0x00000000012715c2 in vio_read ()
#4  0x0000000000ba4583 in ?? ()
#5  0x0000000000ba4883 in ?? ()
#6  0x0000000000ba5734 in my_net_read ()
#7  0x0000000000bb1adc in Protocol_classic::get_command(COM_DATA*, enum_server_command*) ()
#8  0x0000000000c56970 in do_command(THD*) ()
#9  0x0000000000d18fc0 in handle_connection ()
#10 0x00000000011fd844 in pfs_spawn_thread ()
#11 0x00007f7c755b06ba in start_thread (arg=0x7f7c5c068700) at pthread_create.c:333
#12 0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 30 (Thread 0x7f7c5c099700 (LWP 8548)):
#0  0x00007f7c74a3974d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x000000000127140e in vio_io_wait ()
#2  0x00000000012714c8 in vio_socket_io_wait ()
#3  0x00000000012715c2 in vio_read ()
#4  0x0000000000ba4583 in ?? ()
#5  0x0000000000ba4883 in ?? ()
#6  0x0000000000ba5734 in my_net_read ()
#7  0x0000000000bb1adc in Protocol_classic::get_command(COM_DATA*, enum_server_command*) ()
#8  0x0000000000c56970 in do_command(THD*) ()
#9  0x0000000000d18fc0 in handle_connection ()
#10 0x00000000011fd844 in pfs_spawn_thread ()
#11 0x00007f7c755b06ba in start_thread (arg=0x7f7c5c099700) at pthread_create.c:333
#12 0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 29 (Thread 0x7f7c5c0ca700 (LWP 8546)):
#0  0x00007f7c74a3974d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x000000000127140e in vio_io_wait ()
#2  0x00000000012714c8 in vio_socket_io_wait ()
#3  0x00000000012715c2 in vio_read ()
#4  0x0000000000ba4583 in ?? ()
#5  0x0000000000ba4883 in ?? ()
#6  0x0000000000ba5734 in my_net_read ()
#7  0x0000000000bb1adc in Protocol_classic::get_command(COM_DATA*, enum_server_command*) ()
#8  0x0000000000c56970 in do_command(THD*) ()
#9  0x0000000000d18fc0 in handle_connection ()
#10 0x00000000011fd844 in pfs_spawn_thread ()
#11 0x00007f7c755b06ba in start_thread (arg=0x7f7c5c0ca700) at pthread_create.c:333
#12 0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 28 (Thread 0x7f7c5c0fb700 (LWP 8520)):
#0  0x00007f7c74a3974d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x000000000127140e in vio_io_wait ()
#2  0x00000000012714c8 in vio_socket_io_wait ()
#3  0x00000000012715c2 in vio_read ()
#4  0x0000000000ba4583 in ?? ()
#5  0x0000000000ba4883 in ?? ()
#6  0x0000000000ba5734 in my_net_read ()
#7  0x0000000000bb1adc in Protocol_classic::get_command(COM_DATA*, enum_server_command*) ()
#8  0x0000000000c56970 in do_command(THD*) ()
#9  0x0000000000d18fc0 in handle_connection ()
#10 0x00000000011fd844 in pfs_spawn_thread ()
#11 0x00007f7c755b06ba in start_thread (arg=0x7f7c5c0fb700) at pthread_create.c:333
#12 0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 27 (Thread 0x7f7c457fa700 (LWP 8518)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000000000df4b6f in compress_gtid_table ()
#2  0x00000000011fd844 in pfs_spawn_thread ()
#3  0x00007f7c755b06ba in start_thread (arg=0x7f7c457fa700) at pthread_create.c:333
#4  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 26 (Thread 0x7f7c5c12c700 (LWP 8517)):
#0  do_sigwait (sig=0x7f7c5c12bdcc, set=<optimized out>) at ../sysdeps/unix/sysv/linux/sigwait.c:64
#1  __sigwait (set=<optimized out>, sig=0x7f7c5c12bdcc) at ../sysdeps/unix/sysv/linux/sigwait.c:96
#2  0x000000000077dd4b in signal_hand ()
#3  0x00000000011fd844 in pfs_spawn_thread ()
#4  0x00007f7c755b06ba in start_thread (arg=0x7f7c5c12c700) at pthread_create.c:333
#5  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 25 (Thread 0x7f7c45ffb700 (LWP 8516)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000000000f4f8c6 in os_event::wait_low(long) ()
#2  0x00000000010a7d26 in buf_resize_thread ()
#3  0x00007f7c755b06ba in start_thread (arg=0x7f7c45ffb700) at pthread_create.c:333
#4  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 24 (Thread 0x7f7c467fc700 (LWP 8515)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x0000000000f4f782 in os_event::timed_wait(timespec const*) ()
#2  0x0000000000f4fa01 in os_event::wait_time_low(unsigned long, long) ()
#3  0x000000000106698a in ib_wqueue_timedwait(ib_wqueue_t*, long) ()
#4  0x0000000001165f36 in fts_optimize_thread(void*) ()
#5  0x00007f7c755b06ba in start_thread (arg=0x7f7c467fc700) at pthread_create.c:333
#6  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 23 (Thread 0x7f7c46ffd700 (LWP 8514)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x0000000000f4f782 in os_event::timed_wait(timespec const*) ()
#2  0x0000000000f4fa01 in os_event::wait_time_low(unsigned long, long) ()
#3  0x00000000011111a9 in dict_stats_thread ()
#4  0x00007f7c755b06ba in start_thread (arg=0x7f7c46ffd700) at pthread_create.c:333
#5  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 22 (Thread 0x7f7c477fe700 (LWP 8513)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000000000f4f8c6 in os_event::wait_low(long) ()
#2  0x00000000010b58fc in buf_dump_thread ()
#3  0x00007f7c755b06ba in start_thread (arg=0x7f7c477fe700) at pthread_create.c:333
#4  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 21 (Thread 0x7f7c47fff700 (LWP 8512)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000000000f4f8c6 in os_event::wait_low(long) ()
#2  0x0000000000ffd62c in srv_worker_thread ()
#3  0x00007f7c755b06ba in start_thread (arg=0x7f7c47fff700) at pthread_create.c:333
#4  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 20 (Thread 0x7f7c54df4700 (LWP 8511)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000000000f4f8c6 in os_event::wait_low(long) ()
#2  0x0000000000ffd62c in srv_worker_thread ()
#3  0x00007f7c755b06ba in start_thread (arg=0x7f7c54df4700) at pthread_create.c:333
#4  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 19 (Thread 0x7f7c555f5700 (LWP 8510)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000000000f4f8c6 in os_event::wait_low(long) ()
#2  0x0000000000ffd62c in srv_worker_thread ()
#3  0x00007f7c755b06ba in start_thread (arg=0x7f7c555f5700) at pthread_create.c:333
#4  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 18 (Thread 0x7f7c55df6700 (LWP 8509)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000000000f4f8c6 in os_event::wait_low(long) ()
#2  0x000000000100056c in srv_purge_coordinator_thread ()
#3  0x00007f7c755b06ba in start_thread (arg=0x7f7c55df6700) at pthread_create.c:333
#4  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 17 (Thread 0x7f7c565f7700 (LWP 8508)):
#0  0x00007f7c755b9c1d in nanosleep () at ../sysdeps/unix/syscall-template.S:84
#1  0x0000000000f4fe4f in os_thread_sleep(unsigned long) ()
#2  0x0000000001003543 in srv_master_thread ()
#3  0x00007f7c755b06ba in start_thread (arg=0x7f7c565f7700) at pthread_create.c:333
#4  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (Thread 0x7f7c56df8700 (LWP 8507)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x0000000000f4f782 in os_event::timed_wait(timespec const*) ()
#2  0x0000000000f4fa01 in os_event::wait_time_low(unsigned long, long) ()
#3  0x0000000000ffbebf in srv_monitor_thread ()
#4  0x00007f7c755b06ba in start_thread (arg=0x7f7c56df8700) at pthread_create.c:333
#5  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7f7c575f9700 (LWP 8506)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x0000000000f4f782 in os_event::timed_wait(timespec const*) ()
#2  0x0000000000f4fa01 in os_event::wait_time_low(unsigned long, long) ()
#3  0x0000000001001a70 in srv_error_monitor_thread ()
#4  0x00007f7c755b06ba in start_thread (arg=0x7f7c575f9700) at pthread_create.c:333
#5  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7f7c57dfa700 (LWP 8505)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x0000000000f4f782 in os_event::timed_wait(timespec const*) ()
#2  0x0000000000f4fa01 in os_event::wait_time_low(unsigned long, long) ()
#3  0x0000000000f19606 in lock_wait_timeout_thread ()
#4  0x00007f7c755b06ba in start_thread (arg=0x7f7c57dfa700) at pthread_create.c:333
#5  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7f7c5c94e700 (LWP 8503)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x0000000000f4f782 in os_event::timed_wait(timespec const*) ()
#2  0x0000000000f4fa01 in os_event::wait_time_low(unsigned long, long) ()
#3  0x00000000010c21df in buf_flush_page_cleaner_coordinator ()
#4  0x00007f7c755b06ba in start_thread (arg=0x7f7c5c94e700) at pthread_create.c:333
#5  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7f7c5d14f700 (LWP 8502)):
#0  0x00007f7c7665164a in ?? () from /lib/x86_64-linux-gnu/libaio.so.1
#1  0x0000000000f43c48 in LinuxAIOHandler::collect() ()
#2  0x0000000000f4891c in LinuxAIOHandler::poll(fil_node_t**, void**, IORequest*) ()
#3  0x0000000000f4dbbd in os_aio_handler(unsigned long, fil_node_t**, void**, IORequest*) ()
#4  0x0000000001119b2f in fil_aio_wait(unsigned long) ()
#5  0x0000000001004d00 in io_handler_thread ()
#6  0x00007f7c755b06ba in start_thread (arg=0x7f7c5d14f700) at pthread_create.c:333
#7  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7f7c5d950700 (LWP 8501)):
#0  0x00007f7c7665164a in ?? () from /lib/x86_64-linux-gnu/libaio.so.1
#1  0x0000000000f43c48 in LinuxAIOHandler::collect() ()
#2  0x0000000000f4891c in LinuxAIOHandler::poll(fil_node_t**, void**, IORequest*) ()
#3  0x0000000000f4dbbd in os_aio_handler(unsigned long, fil_node_t**, void**, IORequest*) ()
#4  0x0000000001119b2f in fil_aio_wait(unsigned long) ()
#5  0x0000000001004d00 in io_handler_thread ()
#6  0x00007f7c755b06ba in start_thread (arg=0x7f7c5d950700) at pthread_create.c:333
#7  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f7c5e151700 (LWP 8500)):
#0  0x00007f7c7665164a in ?? () from /lib/x86_64-linux-gnu/libaio.so.1
#1  0x0000000000f43c48 in LinuxAIOHandler::collect() ()
#2  0x0000000000f4891c in LinuxAIOHandler::poll(fil_node_t**, void**, IORequest*) ()
#3  0x0000000000f4dbbd in os_aio_handler(unsigned long, fil_node_t**, void**, IORequest*) ()
#4  0x0000000001119b2f in fil_aio_wait(unsigned long) ()
#5  0x0000000001004d00 in io_handler_thread ()
#6  0x00007f7c755b06ba in start_thread (arg=0x7f7c5e151700) at pthread_create.c:333
#7  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f7c5e952700 (LWP 8499)):
#0  0x00007f7c7665164a in ?? () from /lib/x86_64-linux-gnu/libaio.so.1
#1  0x0000000000f43c48 in LinuxAIOHandler::collect() ()
#2  0x0000000000f4891c in LinuxAIOHandler::poll(fil_node_t**, void**, IORequest*) ()
#3  0x0000000000f4dbbd in os_aio_handler(unsigned long, fil_node_t**, void**, IORequest*) ()
#4  0x0000000001119b2f in fil_aio_wait(unsigned long) ()
#5  0x0000000001004d00 in io_handler_thread ()
#6  0x00007f7c755b06ba in start_thread (arg=0x7f7c5e952700) at pthread_create.c:333
#7  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f7c5f153700 (LWP 8498)):
#0  0x00007f7c7665164a in ?? () from /lib/x86_64-linux-gnu/libaio.so.1
#1  0x0000000000f43c48 in LinuxAIOHandler::collect() ()
#2  0x0000000000f4891c in LinuxAIOHandler::poll(fil_node_t**, void**, IORequest*) ()
#3  0x0000000000f4dbbd in os_aio_handler(unsigned long, fil_node_t**, void**, IORequest*) ()
#4  0x0000000001119b2f in fil_aio_wait(unsigned long) ()
#5  0x0000000001004d00 in io_handler_thread ()
#6  0x00007f7c755b06ba in start_thread (arg=0x7f7c5f153700) at pthread_create.c:333
#7  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f7c5f954700 (LWP 8497)):
#0  0x00007f7c7665164a in ?? () from /lib/x86_64-linux-gnu/libaio.so.1
#1  0x0000000000f43c48 in LinuxAIOHandler::collect() ()
#2  0x0000000000f4891c in LinuxAIOHandler::poll(fil_node_t**, void**, IORequest*) ()
#3  0x0000000000f4dbbd in os_aio_handler(unsigned long, fil_node_t**, void**, IORequest*) ()
#4  0x0000000001119b2f in fil_aio_wait(unsigned long) ()
#5  0x0000000001004d00 in io_handler_thread ()
#6  0x00007f7c755b06ba in start_thread (arg=0x7f7c5f954700) at pthread_create.c:333
#7  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f7c60155700 (LWP 8496)):
#0  0x00007f7c7665164a in ?? () from /lib/x86_64-linux-gnu/libaio.so.1
#1  0x0000000000f43c48 in LinuxAIOHandler::collect() ()
#2  0x0000000000f4891c in LinuxAIOHandler::poll(fil_node_t**, void**, IORequest*) ()
#3  0x0000000000f4dbbd in os_aio_handler(unsigned long, fil_node_t**, void**, IORequest*) ()
#4  0x0000000001119b2f in fil_aio_wait(unsigned long) ()
#5  0x0000000001004d00 in io_handler_thread ()
#6  0x00007f7c755b06ba in start_thread (arg=0x7f7c60155700) at pthread_create.c:333
#7  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f7c60956700 (LWP 8495)):
#0  0x00007f7c7665164a in ?? () from /lib/x86_64-linux-gnu/libaio.so.1
#1  0x0000000000f43c48 in LinuxAIOHandler::collect() ()
#2  0x0000000000f4891c in LinuxAIOHandler::poll(fil_node_t**, void**, IORequest*) ()
#3  0x0000000000f4dbbd in os_aio_handler(unsigned long, fil_node_t**, void**, IORequest*) ()
#4  0x0000000001119b2f in fil_aio_wait(unsigned long) ()
#5  0x0000000001004d00 in io_handler_thread ()
#6  0x00007f7c755b06ba in start_thread (arg=0x7f7c60956700) at pthread_create.c:333
#7  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f7c61157700 (LWP 8494)):
#0  0x00007f7c7665164a in ?? () from /lib/x86_64-linux-gnu/libaio.so.1
#1  0x0000000000f43c48 in LinuxAIOHandler::collect() ()
#2  0x0000000000f4891c in LinuxAIOHandler::poll(fil_node_t**, void**, IORequest*) ()
#3  0x0000000000f4dbbd in os_aio_handler(unsigned long, fil_node_t**, void**, IORequest*) ()
#4  0x0000000001119b2f in fil_aio_wait(unsigned long) ()
#5  0x0000000001004d00 in io_handler_thread ()
#6  0x00007f7c755b06ba in start_thread (arg=0x7f7c61157700) at pthread_create.c:333
#7  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f7c61958700 (LWP 8493)):
#0  0x00007f7c7665164a in ?? () from /lib/x86_64-linux-gnu/libaio.so.1
#1  0x0000000000f43c48 in LinuxAIOHandler::collect() ()
#2  0x0000000000f4891c in LinuxAIOHandler::poll(fil_node_t**, void**, IORequest*) ()
#3  0x0000000000f4dbbd in os_aio_handler(unsigned long, fil_node_t**, void**, IORequest*) ()
#4  0x0000000001119b2f in fil_aio_wait(unsigned long) ()
#5  0x0000000001004d00 in io_handler_thread ()
#6  0x00007f7c755b06ba in start_thread (arg=0x7f7c61958700) at pthread_create.c:333
#7  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f7c6f191700 (LWP 8492)):
#0  0x00007f7c74974b26 in __GI___sigwaitinfo (set=<optimized out>, info=0x7f7c6f190e30) at ../sysdeps/unix/sysv/linux/sigwaitinfo.c:56
#1  0x0000000000e9e52b in ?? ()
#2  0x00000000011fd844 in pfs_spawn_thread ()
#3  0x00007f7c755b06ba in start_thread (arg=0x7f7c6f191700) at pthread_create.c:333
#4  0x00007f7c74a4541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f7c76a65740 (LWP 8482)):
#0  0x00007f7c74a3974d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x0000000000d1b0b7 in Mysqld_socket_listener::listen_for_connection_event() ()
#2  0x0000000000785c20 in mysqld_main(int, char**) ()
#3  0x00007f7c7495e830 in __libc_start_main (main=0x7620a0 <main>, argc=1, argv=0x7ffdf0beeba8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffdf0beeb98) at ../csu/libc-start.c:291
#4  0x000000000077ac59 in _start ()