130315  9:43:03 [ERROR] 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.

To report this bug, see http://kb.askmonty.org/en/reporting-bugs

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.

Server version: 5.3.12-MariaDB-log

key_buffer_size=34359738368

read_buffer_size=8388608

max_used_connections=135

max_threads=501

thread_count=20

connection_count=20

It is possible that mysqld could use up to

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 40230290 K  bytes of memory

Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0x2abbac0c2a10

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 = 0x43e0f0f8 thread_stack 0x48000

./bin/mysqld(my_print_stacktrace+0x2e) [0x998a1e]

./bin/mysqld(handle_fatal_signal+0x3f9) [0x71ede9]

/lib64/libpthread.so.0 [0x399f40eb70]

./bin/mysqld(mi_killed_in_mariadb+0xb) [0x7b412b]

./bin/mysqld(mi_yield_and_check_if_killed+0x23) [0x7caba3]

./bin/mysqld(mi_rnext_same+0xdb) [0x7e19fb]

./bin/mysqld(myrg_rnext_same+0x33) [0x86eb33]

./bin/mysqld(ha_myisammrg::index_next_same(unsigned char*, unsigned char const*, unsigned int)+0x20) [0x86cd60]

./bin/mysqld(handler::read_range_next()+0x3f) [0x70fc9f]

./bin/mysqld(handler::multi_range_read_next(void**)+0xd2) [0x7a52a2]

./bin/mysqld(QUICK_RANGE_SELECT::get_next()+0x39) [0x6ecad9]

./bin/mysqld(QUICK_ROR_INTERSECT_SELECT::get_next()+0x3c) [0x6ededc]

./bin/mysqld [0x70ac7e]

./bin/mysqld(sub_select(JOIN*, st_join_table*, bool)+0xae) [0x678a1e]

./bin/mysqld [0x678f54]

./bin/mysqld(JOIN::exec()+0x856) [0x68afb6]

./bin/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*)+0x199) [0x68d0f9]

./bin/mysqld(handle_select(THD*, st_lex*, select_result*, unsigned long)+0x16f) [0x68dacf]

./bin/mysqld [0x601e9e]

./bin/mysqld(mysql_execute_command(THD*)+0x3a43) [0x607833]

./bin/mysqld(mysql_parse(THD*, char*, unsigned int, char const**)+0x299) [0x60a629]

./bin/mysqld(dispatch_command(enum_server_command, THD*, char*, unsigned int)+0xdf9) [0x60b879]

./bin/mysqld(do_command(THD*)+0x101) [0x60c0b1]

./bin/mysqld(handle_one_connection+0xfd) [0x5fd7bd]

/lib64/libpthread.so.0 [0x399f40673d]

/lib64/libc.so.6(clone+0x6d) [0x399e8d44bd]

Trying to get some variables.

Some pointers may be invalid and cause the dump to abort.

Query (0x2abbc81173e8): select l.dttm as Date, l.usr as Username, l.serial as SN, l.lntype as Type, l.lntxt as Text from logh l  INNER JOIN session s  ON s.sessionid = l.sessionid where l.lntype in ('XXXXXXXXXXXXXXX')  and l.dt in ('2012-02-20')  and l.usr in ('YYYYYYYYYYY')  and l.serial in ('1234567')  and l.lntxt like '%Some text%' and s.speed != 'some_value' and s.inhouse = 'n' limit 1000

Connection ID (thread ID): 3806879

Status: NOT_KILLED

Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_conditio                                n_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,p                                artial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_increme                                ntal=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on

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.