Description:
Store value in memcached - crash MySQL server.
Log - mysqld.err :
090326 12:25:19 - 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=8
max_threads=151
threads_connected=9
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 133309 K
bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
thd: 0xa02d400
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...
stack_bottom = 0xb2f6c394 thread_stack 0x30000
/opt/libexec/mysqld(my_print_stacktrace+0x28) [0x84a2248]
/opt/libexec/mysqld(handle_segfault+0x39e) [0x81def0e]
[0xb7f59400]
/usr/lib/libmemcached.so.2(memcached_generate_hash+0x6a) [0xb3112f7a]
Trying to get some variables.
Some pointers may be invalid and cause the dump to abort...
thd->query at 0xa027470 = select memc_delete('mysql:doc1')
thd->thread_id=44
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.
How to repeat:
mysql> select memc_udf_version();
+--------------------+
| memc_udf_version() |
+--------------------+
| 0.8 |
+--------------------+
1 row in set (0.00 sec)
mysql> select memc_servers_set('192.168.0.108:11211');
+-----------------------------------------+
| memc_servers_set('192.168.0.108:11211') |
+-----------------------------------------+
| 4294967296 |
+-----------------------------------------+
1 row in set (0.00 sec)
mysql> select memc_server_count();
+---------------------+
| memc_server_count() |
+---------------------+
| 1 |
+---------------------+
1 row in set (0.00 sec)
mysql> select memc_libmemcached_version();
+-----------------------------+
| memc_libmemcached_version() |
+-----------------------------+
| 0.25 |
+-----------------------------+
1 row in set (0.00 sec)
mysql> select memc_set('var', 'val');
ERROR 2013 (HY000): Lost connection to MySQL server during query
mysql>
Description: Store value in memcached - crash MySQL server. Log - mysqld.err : 090326 12:25:19 - 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=8 max_threads=151 threads_connected=9 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 133309 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. thd: 0xa02d400 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... stack_bottom = 0xb2f6c394 thread_stack 0x30000 /opt/libexec/mysqld(my_print_stacktrace+0x28) [0x84a2248] /opt/libexec/mysqld(handle_segfault+0x39e) [0x81def0e] [0xb7f59400] /usr/lib/libmemcached.so.2(memcached_generate_hash+0x6a) [0xb3112f7a] Trying to get some variables. Some pointers may be invalid and cause the dump to abort... thd->query at 0xa027470 = select memc_delete('mysql:doc1') thd->thread_id=44 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. How to repeat: mysql> select memc_udf_version(); +--------------------+ | memc_udf_version() | +--------------------+ | 0.8 | +--------------------+ 1 row in set (0.00 sec) mysql> select memc_servers_set('192.168.0.108:11211'); +-----------------------------------------+ | memc_servers_set('192.168.0.108:11211') | +-----------------------------------------+ | 4294967296 | +-----------------------------------------+ 1 row in set (0.00 sec) mysql> select memc_server_count(); +---------------------+ | memc_server_count() | +---------------------+ | 1 | +---------------------+ 1 row in set (0.00 sec) mysql> select memc_libmemcached_version(); +-----------------------------+ | memc_libmemcached_version() | +-----------------------------+ | 0.25 | +-----------------------------+ 1 row in set (0.00 sec) mysql> select memc_set('var', 'val'); ERROR 2013 (HY000): Lost connection to MySQL server during query mysql>