thd: 0x2ab8b85e2a70 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 = 0x411b6f00 thread_stack 0x40000 /usr/libexec/mysqld(my_print_stacktrace+0x24) [0x876f64] /usr/libexec/mysqld(handle_segfault+0x340) [0x5c9210] /lib64/libpthread.so.0 [0x31e0c0e930] /lib64/libc.so.6(gsignal+0x35) [0x31e0430265] /lib64/libc.so.6(abort+0x110) [0x31e0431d10] /usr/lib64/mysql/plugin/ha_innodb_plugin.so [0x2aaab116e38f] /usr/lib64/mysql/plugin/ha_innodb_plugin.so [0x2aaab11614f2] /usr/lib64/mysql/plugin/ha_innodb_plugin.so [0x2aaab1204a68] /usr/lib64/mysql/plugin/ha_innodb_plugin.so [0x2aaab11a7b93] /usr/libexec/mysqld(handler::index_read_idx_map(unsigned char*, unsigned int, unsigned char const*, unsigned long, ha_rkey_function)+0x89) [0x6b0d79] /usr/libexec/mysqld [0x636077] /usr/libexec/mysqld [0x63f00d] /usr/libexec/mysqld [0x63fae5] /usr/libexec/mysqld(JOIN::optimize()+0x4f6) [0x643466] /usr/libexec/mysqld(mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_resul t*, st_select_lex_unit*, st_select_lex*)+0xa1) [0x64c8a1] /usr/libexec/mysqld(handle_select(THD*, st_lex*, select_result*, unsigned long)+0x169) [0x64d2a9] /usr/libexec/mysqld [0x5d3fe6] /usr/libexec/mysqld(mysql_execute_command(THD*)+0x4e5) [0x5d7715] /usr/libexec/mysqld(mysql_parse(THD*, char*, unsigned int, char const**)+0x2b8) [0x5dd698] /usr/libexec/mysqld(dispatch_command(enum_server_command, THD*, char*, unsigned int)+0x5c6) [0x5ddc66] /usr/libexec/mysqld(do_command(THD*)+0xe6) [0x5dee06] /usr/libexec/mysqld(handle_one_connection+0x73d) [0x5d0d1d] /lib64/libpthread.so.0 [0x31e0c06617] /lib64/libc.so.6(clone+0x6d) [0x31e04d3c2d] Trying to get some variables. Some pointers may be invalid and cause the dump to abort... thd->query at 0x2ab845b26740 is an invalid pointer thd->thread_id=379320402 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. Fatal signal 11 while backtracing *** glibc detected *** /usr/libexec/mysqld: corrupted double-linked list: 0x0000000017fa2e50 *** ======= Backtrace: ========= /lib64/libc.so.6[0x31e04723e5] /lib64/libc.so.6(cfree+0x4b)[0x31e047273b] /lib64/libc.so.6(exit+0x83)[0x31e0433343] /usr/libexec/mysqld(handle_segfault+0x4f)[0x5c8f1f] /lib64/libpthread.so.0[0x31e0c0e930] /usr/libexec/mysqld(_Z34create_thread_to_handle_connectionP3THD+0x54)[0x5c85b4] /usr/libexec/mysqld(handle_connections_sockets+0x565)[0x5c8ce5] /usr/libexec/mysqld(main+0xb57)[0x5cd067] /lib64/libc.so.6(__libc_start_main+0xf4)[0x31e041d994] /usr/libexec/mysqld[0x4fc239]