2017-05-17 09:03:20 7fd0b91a3700  InnoDB: Assertion failure in thread 140534435428096 in file ha_innodb.cc line 8663
InnoDB: Failing assertion: prebuilt->trx == thd_to_trx(ha_thd())
InnoDB: We intentionally generate a memory trap.
InnoDB: Submit a detailed bug report to http://bugs.mysql.com.
InnoDB: If you get repeated assertion failures or crashes, even
InnoDB: immediately after the mysqld startup, there may be
InnoDB: corruption in the InnoDB tablespace. Please refer to
InnoDB: http://dev.mysql.com/doc/refman/5.6/en/forcing-innodb-recovery.html
InnoDB: about forcing recovery.
170517  9:03:20 [ERROR] mysqld got signal 6 ;
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 https://mariadb.com/kb/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: 10.0.30-MariaDB
key_buffer_size=134217728
read_buffer_size=131072
max_used_connections=169
max_threads=1002
thread_count=33
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 2331256 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x7fb58382d008
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 = 0x7fd0b91a2860 thread_stack 0x48000
/usr/sbin/mysqld(my_print_stacktrace+0x2e)[0xbd908e]
/usr/sbin/mysqld(handle_fatal_signal+0x3b6)[0x73c336]
/lib64/libpthread.so.0(+0xf370)[0x7fd0bcdd3370]
/lib64/libc.so.6(gsignal+0x37)[0x7fd0bb5821d7]
/lib64/libc.so.6(abort+0x148)[0x7fd0bb5838c8]
/usr/sbin/mysqld[0x8b3b57]
/usr/sbin/mysqld[0x8c86ee]
/usr/sbin/mysqld(_ZN7handler22ha_rnd_init_with_errorEb+0x17)[0x741f07]
/usr/sbin/mysqld(_ZN14Rows_log_event8find_rowEP14rpl_group_info+0x2ea)[0x82003a]
/usr/sbin/mysqld(_ZN21Update_rows_log_event11do_exec_rowEP14rpl_group_info+0x18)[0x8203d8]
/usr/sbin/mysqld(_ZN14Rows_log_event14do_apply_eventEP14rpl_group_info+0x27d)[0x811fed]
/usr/sbin/mysqld(_Z26apply_event_and_update_posP9Log_eventP3THDP14rpl_group_infoP19rpl_parallel_thread+0x16d)[0x55b90d]
/usr/sbin/mysqld(handle_slave_sql+0x1754)[0x55e234]
/lib64/libpthread.so.0(+0x7dc5)[0x7fd0bcdcbdc5]
/lib64/libc.so.6(clone+0x6d)[0x7fd0bb64473d]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x0):
Connection ID (thread ID): 6
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.
Writing a core file
170517 09:14:28 mysqld_safe Number of processes running now: 0
170517 09:14:28 mysqld_safe mysqld restarted