100716 12:21:52 - 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=131072 max_used_connections=2 max_threads=151 threads_connected=1 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 346495 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. thd: 0x7f1bc934d0f0 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 = 0x7f1bbf67be58 thread_stack 0x30000 /usr/sbin/mysqld(my_print_stacktrace+0x29) [0x7f1bc6ff6c29] /usr/sbin/mysqld(handle_segfault+0x404) [0x7f1bc6d044f4] /lib/libpthread.so.0(+0xf8f0) [0x7f1bc65748f0] /usr/sbin/mysqld(mysql_update(THD*, TABLE_LIST*, List&, List&, Item*, unsigned int, st_order*, unsigned long long, enum_duplicates, bool)+0x1228) [0x7f1bc6d9bca8] /usr/sbin/mysqld(mysql_execute_command(THD*)+0x9c3) [0x7f1bc6d16913] /usr/sbin/mysqld(mysql_parse(THD*, char const*, unsigned int, char const**)+0x35f) [0x7f1bc6d1b92f] /usr/sbin/mysqld(dispatch_command(enum_server_command, THD*, char*, unsigned int)+0xd69) [0x7f1bc6d1c6a9] /usr/sbin/mysqld(do_command(THD*)+0xea) [0x7f1bc6d1d28a] /usr/sbin/mysqld(handle_one_connection+0x23d) [0x7f1bc6d0f2bd] /lib/libpthread.so.0(+0x69ca) [0x7f1bc656b9ca] /lib/libc.so.6(clone+0x6d) [0x7f1bc50a16fd] Trying to get some variables. Some pointers may be invalid and cause the dump to abort... thd->query at 0x7f1bc9348b40 = update League set SignupsOpen = (See Console Queries) thd->thread_id=35 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. 100716 12:21:52 [Note] Plugin 'FEDERATED' is disabled. InnoDB: The log sequence number in ibdata files does not match InnoDB: the log sequence number in the ib_logfiles! 100716 12:21:52 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... 100716 12:21:52 InnoDB: Started; log sequence number 0 1905291 100716 12:21:52 [Note] Event Scheduler: Loaded 0 events 100716 12:21:52 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.1.41-3ubuntu12.3' socket: '/var/run/mysqld/mysqld.sock' port: 3306 (Ubuntu)