Description:
We have seen this error off and on since running 5.1.26-rc. We have not seen this error before up to version 5.1.25-rc.
080805 6:04:58 - mysqld got signal 11 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.
We will try our best to scrape up some info that will hopefully help diagnose
the problem, but since we have already crashed, something is definitely wrong
and this may fail.
key_buffer_size=16777216
read_buffer_size=262144
max_used_connections=60
max_threads=500
threads_connected=18
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 405551 K
bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
thd: 0x7f83e8b56b90
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
/usr/local/mysql/sbin/mysqld(print_stacktrace+0x1e) [0x6f96ce]
/usr/local/mysql/sbin/mysqld(handle_segfault+0x327) [0x5c0727]
/lib/libpthread.so.0 [0x7f8b742307d0]
/usr/local/mysql/sbin/mysqld [0x61b380]
/usr/local/mysql/sbin/mysqld [0x62f5b2]
/usr/local/mysql/sbin/mysqld [0x62f2cd]
/usr/local/mysql/sbin/mysqld [0x63323c]
/usr/local/mysql/sbin/mysqld(JOIN::optimize()+0x527) [0x6339f7]
/usr/local/mysql/sbin/mysqld(mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*)+0xa5) [0x63c9b5]
/usr/local/mysql/sbin/mysqld(mysql_explain_union(THD*, st_select_lex_unit*, select_result*)+0x179) [0x63d219]
/usr/local/mysql/sbin/mysqld [0x5cb6f2]
/usr/local/mysql/sbin/mysqld(mysql_execute_command(THD*)+0x442f) [0x5d3c1f]
/usr/local/mysql/sbin/mysqld(mysql_parse(THD*, char const*, unsigned int, char const**)+0x2dd) [0x5d729d]
/usr/local/mysql/sbin/mysqld(dispatch_command(enum_server_command, THD*, char*, unsigned int)+0xb4d) [0x5d7dfd]
/usr/local/mysql/sbin/mysqld(do_command(THD*)+0xca) [0x5d873a]
/usr/local/mysql/sbin/mysqld(handle_one_connection+0x7dd) [0x5c8d1d]
/lib/libpthread.so.0 [0x7f8b742283f7]
/lib/libc.so.6(clone+0x6d) [0x7f8b729c7b2d]
Trying to get some variables.
Some pointers may be invalid and cause the dump to abort...
thd->query at 0x7f83f01db780 is invalid pointer
thd->thread_id=1593256
thd->killed=NOT_KILLED
The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.
It then happened again here:
080805 6:27:37 - mysqld got signal 11 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.
We will try our best to scrape up some info that will hopefully help diagnose
the problem, but since we have already crashed, something is definitely wrong
and this may fail.
key_buffer_size=16777216
read_buffer_size=262144
max_used_connections=19
max_threads=500
threads_connected=16
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 405551 K
bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
thd: 0x371d9790
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
/usr/local/mysql/sbin/mysqld(print_stacktrace+0x1e) [0x6f96ce]
/usr/local/mysql/sbin/mysqld(handle_segfault+0x327) [0x5c0727]
/lib/libpthread.so.0 [0x7f8c4727c7d0]
/usr/local/mysql/sbin/mysqld [0x61b380]
/usr/local/mysql/sbin/mysqld [0x62f5b2]
/usr/local/mysql/sbin/mysqld [0x62f2cd]
/usr/local/mysql/sbin/mysqld [0x63323c]
/usr/local/mysql/sbin/mysqld(JOIN::optimize()+0x527) [0x6339f7]
/usr/local/mysql/sbin/mysqld(mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*)+0xa5) [0x63c9b5]
/usr/local/mysql/sbin/mysqld(mysql_explain_union(THD*, st_select_lex_unit*, select_result*)+0x179) [0x63d219]
/usr/local/mysql/sbin/mysqld [0x5cb6f2]
/usr/local/mysql/sbin/mysqld(mysql_execute_command(THD*)+0x442f) [0x5d3c1f]
/usr/local/mysql/sbin/mysqld(mysql_parse(THD*, char const*, unsigned int, char const**)+0x2dd) [0x5d729d]
/usr/local/mysql/sbin/mysqld(dispatch_command(enum_server_command, THD*, char*, unsigned int)+0xb4d) [0x5d7dfd]
/usr/local/mysql/sbin/mysqld(do_command(THD*)+0xca) [0x5d873a]
/usr/local/mysql/sbin/mysqld(handle_one_connection+0x7dd) [0x5c8d1d]
/lib/libpthread.so.0 [0x7f8c472743f7]
/lib/libc.so.6(clone+0x6d) [0x7f8c45a13b2d]
Trying to get some variables.
Some pointers may be invalid and cause the dump to abort...
thd->query at 0x7f84c4ba5790 is invalid pointer
thd->thread_id=1995
thd->killed=NOT_KILLED
The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.
080805 06:27:37 mysqld_safe Number of processes running now: 0
080805 06:27:37 mysqld_safe mysqld restarted
080805 6:27:37 [Warning] The syntax 'for replication startup options' is deprecated and will be removed in MySQL 5.2. Please use 'CHANGE MASTER' instead.
InnoDB: Log scan progressed past the checkpoint lsn 302 913573923
080805 6:27:43 InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
InnoDB: Doing recovery: scanned up to log sequence number 302 918816768
InnoDB: Doing recovery: scanned up to log sequence number 302 924059648
InnoDB: Doing recovery: scanned up to log sequence number 302 929302528
InnoDB: Doing recovery: scanned up to log sequence number 302 934545408
InnoDB: Doing recovery: scanned up to log sequence number 302 939788288
InnoDB: Doing recovery: scanned up to log sequence number 302 942515691
InnoDB: Transaction 0 1663209138 was in the XA prepared state.
InnoDB: 1 transaction(s) which must be rolled back or cleaned up
InnoDB: in total 0 row operations to undo
InnoDB: Trx id counter is 0 1663209472
The machine has 32GB of RAM, 28GB used for innodb.
How to repeat:
This happens with normal slaving. The machine only handles select queries from our users. The inserts/updates are received from master. Master is running 5.1.25-rc.
