140502  8:43:56 [Note] WSREP: Received NON-PRIMARY.
140502  8:43:56 [Note] WSREP: Shifting SYNCED -> OPEN (TO: 9320857)
140502  8:43:56 [Note] WSREP: Received self-leave message.
140502  8:43:56 [Note] WSREP: Flow-control interval: [0, 0]
140502  8:43:56 [Note] WSREP: Received SELF-LEAVE. Closing connection.
140502  8:43:56 [Note] WSREP: Shifting OPEN -> CLOSED (TO: 9320857)
140502  8:43:56 [Note] WSREP: RECV thread exiting 0: Success
140502  8:43:56 [Note] WSREP: recv_thread() joined.
140502  8:43:56 [Note] WSREP: Closing replication queue.
140502  8:43:56 [Note] WSREP: Closing slave action queue.
140502  8:43:56 [Note] WSREP: New cluster view: global state: 727ac931-ae1d-11e2-0800-35fac11491b4:9320857, view# -1: non-Primary, number of nodes: 1, my index: 0, protocol version 2
140502  8:43:56 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
140502  8:43:56 [Note] WSREP: New cluster view: global state: 727ac931-ae1d-11e2-0800-35fac11491b4:9320857, view# -1: non-Primary, number of nodes: 0, my index: -1, protocol version 2
140502  8:43:56 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
140502  8:43:56 [Note] WSREP: applier thread exiting (code:0)
140502  8:43:56 [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: 5.5.37-MariaDB-1~precise-wsrep-log
key_buffer_size=33554432
read_buffer_size=2097152
max_used_connections=4
max_threads=202
thread_count=1
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 1277538 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0x7f6eff012000
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 = 0x7f6f003b2a20 thread_stack 0x48000
/usr/sbin/mysqld(my_print_stacktrace+0x2b)[0x7f6f14ee808b]
/usr/sbin/mysqld(handle_fatal_signal+0x471)[0x7f6f14b03ef1]
/lib/x86_64-linux-gnu/libpthread.so.0(+0xfcb0)[0x7f6f1334ecb0]
/usr/sbin/mysqld(+0x5a5e9c)[0x7f6f14bbbe9c]
/usr/sbin/mysqld(_ZN14Relay_log_infoD1Ev+0x1d2)[0x7f6f14a68e82]
/usr/sbin/mysqld(_ZN14Relay_log_infoD0Ev+0x11)[0x7f6f14a68f21]
/usr/sbin/mysqld(_ZN3THDD1Ev+0x18c)[0x7f6f14979a1c]
/usr/sbin/mysqld(_ZN3THDD0Ev+0x11)[0x7f6f1497a031]
/usr/sbin/mysqld(_Z29one_thread_per_connection_endP3THDb+0x18)[0x7f6f1491eab8]
/usr/sbin/mysqld(start_wsrep_THD+0x5d6)[0x7f6f1491f536]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x7e9a)[0x7f6f13346e9a]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f6f12a773fd]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x0): is an invalid pointer
Connection ID (thread ID): 2
Status: KILL_CONNECTION

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=off

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.
140502 08:43:56 mysqld_safe Number of processes running now: 0
140502 08:43:56 mysqld_safe WSREP: not restarting wsrep node automatically
140502 08:43:56 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended