(gdb) +thread apply all bt

Thread 24 (LWP 12609):
+bt
#0  0x000000363720b7bb in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x0000000000a7271b in os_cond_wait_timed (abstime=0x7f07e2de7d30, fast_mutex=0x2f44130, cond=0x2f44170) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0sync.cc:177
#2  os_event_wait_time_low (event=0x2f44130, time_in_usec=<optimized out>, reset_sig_count=1) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0sync.cc:723
#3  0x0000000000b08bcd in srv_monitor_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/srv/srv0srv.cc:1831
#4  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#5  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 23 (LWP 12611):
+bt
#0  0x000000363720b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x0000000000a73183 in os_cond_wait (fast_mutex=0x2f44010, cond=0x2f44050) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0sync.cc:214
#2  os_event_wait_low (event=0x2f44010, reset_sig_count=16969) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0sync.cc:610
#3  0x0000000000b09964 in srv_purge_coordinator_suspend (rseg_history_len=1698, slot=0x2f43e20) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/srv/srv0srv.cc:3155
#4  srv_purge_coordinator_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/srv/srv0srv.cc:3272
#5  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#6  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 22 (LWP 12616):
+bt
#0  0x000000363720f2a5 in sigwait () from /lib64/libpthread.so.0
#1  0x00000000005a2fcb in signal_hand (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/mysqld.cc:3172
#2  0x00000000009e033a in pfs_spawn_thread (arg=0x35cb930) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/perfschema/pfs.cc:1858
#3  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#4  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 21 (LWP 12613):
+bt
#0  0x000000363720b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x0000000000a73183 in os_cond_wait (fast_mutex=0x2f441c0, cond=0x2f44200) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0sync.cc:214
#2  os_event_wait_low (event=0x2f441c0, reset_sig_count=1) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0sync.cc:610
#3  0x0000000000b8920c in buf_dump_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/buf/buf0dump.cc:594
#4  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#5  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 20 (LWP 12617):
+bt
#0  0x0000003636edf253 in poll () from /lib64/libc.so.6
#1  0x0000000000cb0036 in vio_io_wait (vio=<optimized out>, event=VIO_IO_EVENT_READ, timeout=28800000) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/vio/viosocket.c:820
#2  0x0000000000cb04d3 in vio_socket_io_wait (vio=<optimized out>, event=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/vio/viosocket.c:68
#3  0x0000000000cb0e70 in vio_read (vio=0x370ea80, buf=0x370ec70 "\a", size=4) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/vio/viosocket.c:123
#4  0x000000000067be43 in net_read_raw_loop (net=0x3631930, count=4) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/net_serv.cc:663
#5  0x000000000067c9a1 in net_read_packet_header (net=0x3631930) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/net_serv.cc:745
#6  net_read_packet (net=<optimized out>, complen=0x7f07e4895c68) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/net_serv.cc:810
#7  0x000000000067ccac in my_net_read (net=0x3631930) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/net_serv.cc:888
#8  0x000000000072a917 in do_command (thd=0x36316d0) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/sql_parse.cc:983
#9  0x00000000006ee1ef in do_handle_one_connection (thd_arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/sql_connect.cc:1615
#10 0x00000000006ee2d7 in handle_one_connection (arg=0x36316d0) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/sql_connect.cc:1526
#11 0x00000000009e033a in pfs_spawn_thread (arg=0x36abfe0) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/perfschema/pfs.cc:1858
#12 0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#13 0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 19 (LWP 12614):
+bt
#0  0x000000363720b7bb in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x0000000000a7271b in os_cond_wait_timed (abstime=0x7f07db5fdd00, fast_mutex=0x354e620, cond=0x354e660) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0sync.cc:177
#2  os_event_wait_time_low (event=0x354e620, time_in_usec=<optimized out>, reset_sig_count=69) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0sync.cc:723
#3  0x0000000000bc6243 in dict_stats_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/dict/dict0stats_bg.cc:349
#4  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#5  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 18 (LWP 12592):
+bt
#0  0x0000003636a00614 in ?? () from /lib64/libaio.so.1
#1  0x0000000000a6cbd3 in os_aio_linux_collect (seg_size=256, segment=1, array=0x2f855a0) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5090
#2  os_aio_linux_handle (global_seg=7, message1=0x7f07e6698d98, message2=0x7f07e6698d90, type=0x7f07e6698d88, space_id=0x7f07e6698d80) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5235
#3  0x0000000000bcc0d7 in fil_aio_wait (segment=7) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/fil/fil0fil.cc:5579
#4  0x0000000000b0aaf8 in io_handler_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/srv/srv0start.cc:479
#5  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#6  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 17 (LWP 12608):
+bt
#0  0x000000363720b7bb in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x0000000000a7271b in os_cond_wait_timed (abstime=0x7f07e37e8cc0, fast_mutex=0x2f440a0, cond=0x2f440e0) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0sync.cc:177
#2  os_event_wait_time_low (event=0x2f440a0, time_in_usec=<optimized out>, reset_sig_count=1) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0sync.cc:723
#3  0x0000000000b07702 in srv_error_monitor_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/srv/srv0srv.cc:2093
#4  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#5  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 16 (LWP 12615):
+bt
#0  0x000000363720b7bb in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x0000000000a7271b in os_cond_wait_timed (abstime=0x7f07dabfcc90, fast_mutex=0x356bc80, cond=0x356bcc0) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0sync.cc:177
#2  os_event_wait_time_low (event=0x356bc80, time_in_usec=<optimized out>, reset_sig_count=1) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0sync.cc:723
#3  0x0000000000b427e1 in ib_wqueue_timedwait (wq=0x35667a8, wait_in_usecs=5000000) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/ut/ut0wqueue.cc:154
#4  0x0000000000bfb140 in fts_optimize_thread (arg=0x35667a8) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/fts/fts0opt.cc:2972
#5  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#6  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 15 (LWP 12607):
+bt
#0  0x000000363720b7bb in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x0000000000a7271b in os_cond_wait_timed (abstime=0x7f07e41e9d00, fast_mutex=0x3549050, cond=0x3549090) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0sync.cc:177
#2  os_event_wait_time_low (event=0x3549050, time_in_usec=<optimized out>, reset_sig_count=1) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0sync.cc:723
#3  0x0000000000a50051 in lock_wait_timeout_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/lock/lock0wait.cc:503
#4  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#5  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 14 (LWP 12610):
+bt
#0  0x0000003636ee14f3 in select () from /lib64/libc.so.6
#1  0x0000000000a7350f in os_thread_sleep (tm=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0thread.cc:255
#2  0x0000000000b06b25 in srv_master_sleep () at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/srv/srv0srv.cc:2818
#3  srv_master_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/srv/srv0srv.cc:2862
#4  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#5  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 13 (LWP 12588):
+bt
#0  0x0000003636a00614 in ?? () from /lib64/libaio.so.1
#1  0x0000000000a6cbd3 in os_aio_linux_collect (seg_size=256, segment=1, array=0x2f43050) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5090
#2  os_aio_linux_handle (global_seg=3, message1=0x7f07e8e9cd98, message2=0x7f07e8e9cd90, type=0x7f07e8e9cd88, space_id=0x7f07e8e9cd80) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5235
#3  0x0000000000bcc0d7 in fil_aio_wait (segment=3) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/fil/fil0fil.cc:5579
#4  0x0000000000b0aaf8 in io_handler_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/srv/srv0start.cc:479
#5  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#6  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 12 (LWP 12612):
+bt
#0  0x0000003636ee14f3 in select () from /lib64/libc.so.6
#1  0x0000000000a7350f in os_thread_sleep (tm=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0thread.cc:255
#2  0x0000000000b8e9aa in page_cleaner_sleep_if_needed (next_loop_time=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/buf/buf0flu.cc:2413
#3  buf_flush_page_cleaner_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/buf/buf0flu.cc:2454
#4  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#5  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 11 (LWP 12590):
+bt
#0  0x0000003636a00614 in ?? () from /lib64/libaio.so.1
#1  0x0000000000a6cbd3 in os_aio_linux_collect (seg_size=256, segment=3, array=0x2f43050) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5090
#2  os_aio_linux_handle (global_seg=5, message1=0x7f07e7a9ad98, message2=0x7f07e7a9ad90, type=0x7f07e7a9ad88, space_id=0x7f07e7a9ad80) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5235
#3  0x0000000000bcc0d7 in fil_aio_wait (segment=5) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/fil/fil0fil.cc:5579
#4  0x0000000000b0aaf8 in io_handler_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/srv/srv0start.cc:479
#5  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#6  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 10 (LWP 12585):
+bt
#0  0x0000003636a00614 in ?? () from /lib64/libaio.so.1
#1  0x0000000000a6cbd3 in os_aio_linux_collect (seg_size=256, segment=0, array=0x2f77b00) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5090
#2  os_aio_linux_handle (global_seg=0, message1=0x7f07fcc0cd98, message2=0x7f07fcc0cd90, type=0x7f07fcc0cd88, space_id=0x7f07fcc0cd80) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5235
#3  0x0000000000bcc0d7 in fil_aio_wait (segment=0) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/fil/fil0fil.cc:5579
#4  0x0000000000b0aaf8 in io_handler_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/srv/srv0start.cc:479
#5  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#6  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 9 (LWP 12589):
+bt
#0  0x0000003636a00614 in ?? () from /lib64/libaio.so.1
#1  0x0000000000a6cbd3 in os_aio_linux_collect (seg_size=256, segment=2, array=0x2f43050) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5090
#2  os_aio_linux_handle (global_seg=4, message1=0x7f07e849bd98, message2=0x7f07e849bd90, type=0x7f07e849bd88, space_id=0x7f07e849bd80) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5235
#3  0x0000000000bcc0d7 in fil_aio_wait (segment=4) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/fil/fil0fil.cc:5579
#4  0x0000000000b0aaf8 in io_handler_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/srv/srv0start.cc:479
#5  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#6  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 8 (LWP 12586):
+bt
#0  0x0000003636a00614 in ?? () from /lib64/libaio.so.1
#1  0x0000000000a6cbd3 in os_aio_linux_collect (seg_size=256, segment=0, array=0x2f6a060) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5090
#2  os_aio_linux_handle (global_seg=1, message1=0x7f07ea29ed98, message2=0x7f07ea29ed90, type=0x7f07ea29ed88, space_id=0x7f07ea29ed80) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5235
#3  0x0000000000bcc0d7 in fil_aio_wait (segment=1) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/fil/fil0fil.cc:5579
#4  0x0000000000b0aaf8 in io_handler_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/srv/srv0start.cc:479
#5  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#6  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 7 (LWP 12591):
+bt
#0  0x0000003636a00614 in ?? () from /lib64/libaio.so.1
#1  0x0000000000a6cbd3 in os_aio_linux_collect (seg_size=256, segment=0, array=0x2f855a0) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5090
#2  os_aio_linux_handle (global_seg=6, message1=0x7f07e7099d98, message2=0x7f07e7099d90, type=0x7f07e7099d88, space_id=0x7f07e7099d80) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5235
#3  0x0000000000bcc0d7 in fil_aio_wait (segment=6) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/fil/fil0fil.cc:5579
#4  0x0000000000b0aaf8 in io_handler_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/srv/srv0start.cc:479
#5  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#6  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 6 (LWP 12594):
+bt
#0  0x0000003636a00614 in ?? () from /lib64/libaio.so.1
#1  0x0000000000a6cbd3 in os_aio_linux_collect (seg_size=256, segment=3, array=0x2f855a0) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5090
#2  os_aio_linux_handle (global_seg=9, message1=0x7f07e5296d98, message2=0x7f07e5296d90, type=0x7f07e5296d88, space_id=0x7f07e5296d80) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5235
#3  0x0000000000bcc0d7 in fil_aio_wait (segment=9) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/fil/fil0fil.cc:5579
#4  0x0000000000b0aaf8 in io_handler_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/srv/srv0start.cc:479
#5  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#6  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 5 (LWP 12593):
+bt
#0  0x0000003636a00614 in ?? () from /lib64/libaio.so.1
#1  0x0000000000a6cbd3 in os_aio_linux_collect (seg_size=256, segment=2, array=0x2f855a0) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5090
#2  os_aio_linux_handle (global_seg=8, message1=0x7f07e5c97d98, message2=0x7f07e5c97d90, type=0x7f07e5c97d88, space_id=0x7f07e5c97d80) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5235
#3  0x0000000000bcc0d7 in fil_aio_wait (segment=8) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/fil/fil0fil.cc:5579
#4  0x0000000000b0aaf8 in io_handler_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/srv/srv0start.cc:479
#5  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#6  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 4 (LWP 12587):
+bt
#0  0x0000003636a00614 in ?? () from /lib64/libaio.so.1
#1  0x0000000000a6cbd3 in os_aio_linux_collect (seg_size=256, segment=0, array=0x2f43050) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5090
#2  os_aio_linux_handle (global_seg=2, message1=0x7f07e989dd98, message2=0x7f07e989dd90, type=0x7f07e989dd88, space_id=0x7f07e989dd80) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/os/os0file.cc:5235
#3  0x0000000000bcc0d7 in fil_aio_wait (segment=2) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/fil/fil0fil.cc:5579
#4  0x0000000000b0aaf8 in io_handler_thread (arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/srv/srv0start.cc:479
#5  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#6  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 3 (LWP 12669):
+bt
#0  0x000000363720b43c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000005a41bf in inline_mysql_cond_wait (src_line=2666, mutex=0x14f7860 <LOCK_thread_count>, that=0x14f97e0 <COND_thread_cache>, src_file=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/include/mysql/psi/mysql_thread.h:1162
#2  block_until_new_connection () at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/mysqld.cc:2666
#3  one_thread_per_connection_end (thd=<optimized out>, block_pthread=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/mysqld.cc:2760
#4  0x00000000006ee16e in do_handle_one_connection (thd_arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/sql_connect.cc:1629
#5  0x00000000006ee2d7 in handle_one_connection (arg=0x371b200) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/sql_connect.cc:1526
#6  0x00000000009e033a in pfs_spawn_thread (arg=0x3685fb0) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/perfschema/pfs.cc:1858
#7  0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#8  0x0000003636ee890d in clone () from /lib64/libc.so.6

Thread 2 (LWP 12583):
+bt
#0  0x0000003636edf253 in poll () from /lib64/libc.so.6
#1  0x00000000005a450a in handle_connections_sockets () at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/mysqld.cc:6259
#2  0x00000000005ab4eb in mysqld_main (argc=48, argv=0x2e48148) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/mysqld.cc:5674
#3  0x0000003636e1ecdd in __libc_start_main () from /lib64/libc.so.6
#4  0x000000000059c785 in _start ()

Thread 1 (LWP 12621):
+bt
#0  0x000000363720c69c in pthread_kill () from /lib64/libpthread.so.0
#1  0x00000000006874ae in handle_fatal_signal (sig=6) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/signal_handler.cc:251
#2  <signal handler called>
#3  0x0000003636e328a5 in raise () from /lib64/libc.so.6
#4  0x0000003636e34085 in abort () from /lib64/libc.so.6
#5  0x0000000000af951e in row_upd_sec_index_entry (node=<optimized out>, thr=0x7f07c027ea40) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/row/row0upd.cc:1803
#6  0x0000000000afbe77 in row_upd_sec_step (thr=0x7f07c027ea40, node=0x7f07c027e218) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/row/row0upd.cc:1875
#7  row_upd (thr=0x7f07c027ea40, node=0x7f07c027e218) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/row/row0upd.cc:2607
#8  row_upd_step (thr=0x7f07c027ea40) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/row/row0upd.cc:2724
#9  0x0000000000acce5b in row_update_for_mysql (mysql_rec=<optimized out>, prebuilt=0x7f07c027cd68) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/row/row0mysql.cc:1729
#10 0x0000000000a04e87 in ha_innobase::delete_row (this=0x7f07c001f720, record=0x7f07c00731d0 "\377\377\003\200") at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/innobase/handler/ha_innodb.cc:7529
#11 0x00000000005c1375 in handler::ha_delete_row (this=0x7f07c001f720, buf=0x7f07c00731d0 "\377\377\003\200") at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/handler.cc:7508
#12 0x00000000007050ed in write_record (thd=0x3712dd0, table=0x7f07c0162750, info=0x7f07e4853260, update=0x7f07e48531e0) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/sql_insert.cc:1890
#13 0x000000000070c949 in mysql_insert (thd=0x3712dd0, table_list=0x7f07c00ecea8, fields=..., values_list=..., update_fields=..., update_values=..., duplic=DUP_REPLACE, ignore=false) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/sql_insert.cc:1073
#14 0x0000000000724bf9 in mysql_execute_command (thd=0x3712dd0) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/sql_parse.cc:3649
#15 0x0000000000728628 in mysql_parse (thd=0x3712dd0, rawbuf=0x3715190 "P\303\070\001", length=<optimized out>, parser_state=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/sql_parse.cc:6479
#16 0x000000000072978c in dispatch_command (command=COM_QUERY, thd=0x3712dd0, packet=0x7f07e4854a90 "\320-q\003", packet_length=69) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/sql_parse.cc:1355
#17 0x000000000072a987 in do_command (thd=0x3712dd0) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/sql_parse.cc:1049
#18 0x00000000006ee1ef in do_handle_one_connection (thd_arg=<optimized out>) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/sql_connect.cc:1615
#19 0x00000000006ee2d7 in handle_one_connection (arg=0x3712dd0) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/sql/sql_connect.cc:1526
#20 0x00000000009e033a in pfs_spawn_thread (arg=0x36d20d0) at /bzr/5.6-QA_dbg/Percona-Server-5.6.13-rc60.5/storage/perfschema/pfs.cc:1858
#21 0x0000003637207851 in start_thread () from /lib64/libpthread.so.0
#22 0x0000003636ee890d in clone () from /lib64/libc.so.6
(gdb) +set logging off