150729 16:04:02 [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: 10.0.16-MariaDB-wsrep-log
key_buffer_size=134217728
read_buffer_size=2097152
max_used_connections=169
max_threads=302
thread_count=166
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 1374436 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0x7f28d6adb008
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 = 0x7f28d0edad00 thread_stack 0x48000
(my_addr_resolve failure: fork)
/usr/sbin/mysqld(my_print_stacktrace+0x2b) [0xb995bb]
/usr/sbin/mysqld(handle_fatal_signal+0x398) [0x743ed8]
/lib64/libpthread.so.0(+0xf710) [0x7f544ef86710]
/usr/sbin/mysqld() [0x94b622]
/usr/sbin/mysqld() [0x8a03b7]
/usr/sbin/mysqld(handler::ha_index_next(unsigned char*)+0x10c) [0x748cfc]
/usr/sbin/mysqld(handler::read_range_next()+0x29) [0x7496e9]
/usr/sbin/mysqld() [0xb740e5]
/usr/sbin/mysqld(handler::multi_range_read_next(void**)+0xb2) [0x6c8ff2]
/usr/sbin/mysqld(QUICK_RANGE_SELECT::get_next()+0x52) [0x8131e2]
/usr/sbin/mysqld(filesort(THD*, TABLE*, st_sort_field*, unsigned int, SQL_SELECT*, unsigned long long, bool, unsigned long long*, unsigned long long*)+0x117e) [0x742eee]
/usr/sbin/mysqld() [0x61e057]
/usr/sbin/mysqld(JOIN::exec_inner()+0x95c) [0x62e87c]
/usr/sbin/mysqld(JOIN::exec()+0x11) [0x6307b1]
/usr/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*)+0x1dd) [0x62d39d]
/usr/sbin/mysqld(handle_select(THD*, LEX*, select_result*, unsigned long)+0x28d) [0x630b0d]
/usr/sbin/mysqld() [0x5d49c9]
/usr/sbin/mysqld(mysql_execute_command(THD*)+0x53c6) [0x5e04b6]
/usr/sbin/mysqld() [0x5e3452]
/usr/sbin/mysqld() [0x5e3d4b]
/usr/sbin/mysqld(dispatch_command(enum_server_command, THD*, char*, unsigned int)+0x17f0) [0x5e5a80]
/usr/sbin/mysqld(do_command(THD*)+0x1ca) [0x5e630a]
/usr/sbin/mysqld(do_handle_one_connection(THD*)+0x55b) [0x6a2c4b]
/usr/sbin/mysqld(handle_one_connection+0x42) [0x6a2d42]
/lib64/libpthread.so.0(+0x79d1) [0x7f544ef7e9d1]
/lib64/libc.so.6(clone+0x6d) [0x7f544d6989dd]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x7f2903f95020): is an invalid pointer
Connection ID (thread ID): 1058672
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,engine_condition_pushdown=off,index_condition_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,partial_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_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=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.
150729 16:04:12 mysqld_safe Number of processes running now: 0
150729 16:04:12 mysqld_safe WSREP: not restarting wsrep node automatically
150729 16:04:12 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended