percona-projects-qa

POT crash on handle_connections_sockets()/libc.poll()

Bug #791163 reported by Valentine Gostev
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
percona-projects-qa
Fix Released
Critical
Laurynas Biveinis
percona-projects-qa 5.5.13-eb "eb"

Bug Description

While running rpl.rpl_mix_insert_delayed 'mix' both mysqld instances crashed on same calls. Please find test log attached.

Revision history for this message
Valentine Gostev (longbow) wrote :
Revision history for this message
Valentine Gostev (longbow) wrote :

mysqld.1
(gdb) bt
#0 0x0000003fccc0bd02 in pthread_kill () from /lib64/libpthread.so.0
#1 0x00000000008c853f in my_write_core (sig=6) at /mnt/x25m/gval/r3487/mysys/stacktrace.c:423
#2 0x00000000005395a7 in handle_segfault (sig=6) at /mnt/x25m/gval/r3487/sql/mysqld.cc:2546
#3 <signal handler called>
#4 0x0000003fcc4cb186 in poll () from /lib64/libc.so.6
#5 0x0000000000539f1f in handle_connections_sockets () at /mnt/x25m/gval/r3487/sql/mysqld.cc:5198
#6 0x000000000053e936 in mysqld_main (argc=49, argv=0xe89fa80) at /mnt/x25m/gval/r3487/sql/mysqld.cc:4638
#7 0x0000000000533383 in main (argc=10, argv=0x7fff0e1a2588) at /mnt/x25m/gval/r3487/sql/main.cc:24

mysqld.2
(gdb) bt
#0 0x0000003fccc0bd02 in pthread_kill () from /lib64/libpthread.so.0
#1 0x00000000008c853f in my_write_core (sig=6) at /mnt/x25m/gval/r3487/mysys/stacktrace.c:423
#2 0x00000000005395a7 in handle_segfault (sig=6) at /mnt/x25m/gval/r3487/sql/mysqld.cc:2546
#3 <signal handler called>
#4 0x0000003fcc4cb186 in poll () from /lib64/libc.so.6
#5 0x0000000000539f1f in handle_connections_sockets () at /mnt/x25m/gval/r3487/sql/mysqld.cc:5198
#6 0x000000000053e936 in mysqld_main (argc=58, argv=0x2d34b50) at /mnt/x25m/gval/r3487/sql/mysqld.cc:4638
#7 0x0000000000533383 in main (argc=10, argv=0x7fff23e45838) at /mnt/x25m/gval/r3487/sql/main.cc:24

Changed in percona-projects-qa:
milestone: none → 5.5.13-eb
Revision history for this message
Valentine Gostev (longbow) wrote :

core.28906 - mysqld.1
core.28911 - mysqld.2

Changed in percona-projects-qa:
status: New → Confirmed
assignee: nobody → Laurynas Biveinis (laurynas-biveinis)
Laurynas Biveinis (laurynas-biveinis)
Changed in percona-projects-qa:
status: Confirmed → In Progress
importance: Undecided → Critical
Laurynas Biveinis (laurynas-biveinis)
Changed in percona-projects-qa:
status: In Progress → Fix Committed
Revision history for this message
Alexey Kopytov (akopytov) wrote :

"handle_segfault (sig=6)"

I think it was actually an assertion failure in another thread. So backtraces and poll() have nothing to do with the actual reason of the crash.

Just something to keep in mind in we see anything similar once again.

Laurynas Biveinis (laurynas-biveinis)
Changed in percona-projects-qa:
status: Fix Committed → Fix Released
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