Thread pointer: 0x7fa411bc8008
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 = 0x7fa430bb3288 thread_stack 0x48400
/opt/mariadb/bin/mysqld(my_print_stacktrace+0x2e)[0xc0a26e]
/opt/mariadb/bin/mysqld(handle_fatal_signal+0x4bf)[0x76880f]
/lib64/libpthread.so.0(+0xf100)[0x7fa43fb3e100]
/lib64/libc.so.6(gsignal+0x37)[0x7fa43e9525f7]
/lib64/libc.so.6(abort+0x148)[0x7fa43e953ce8]
/lib64/libc.so.6(+0x2e566)[0x7fa43e94b566]
/lib64/libc.so.6(+0x2e612)[0x7fa43e94b612]
/opt/mariadb/lib/galera/libgalera_smm.so(_ZN6galera13Certification10do_test_v3EPNS_9TrxHandleEb+0x94)[0x7fa43bc182bc]
/opt/mariadb/lib/galera/libgalera_smm.so(_ZN6galera13Certification7do_testEPNS_9TrxHandleEb+0x5cf)[0x7fa43bc18f1d]
/opt/mariadb/lib/galera/libgalera_smm.so(_ZN6galera13Certification4testEPNS_9TrxHandleEb+0x92)[0x7fa43bc1a394]
/opt/mariadb/lib/galera/libgalera_smm.so(_ZN6galera13Certification10append_trxEPNS_9TrxHandleE+0x5cf)[0x7fa43bc1ad99]
/opt/mariadb/lib/galera/libgalera_smm.so(_ZN6galera13ReplicatorSMM4certEPNS_9TrxHandleE+0x237)[0x7fa43bc4f8fd]
/opt/mariadb/lib/galera/libgalera_smm.so(_ZN6galera13ReplicatorSMM14cert_and_catchEPNS_9TrxHandleE+0x33)[0x7fa43bc4c64f]
/opt/mariadb/lib/galera/libgalera_smm.so(_ZN6galera13ReplicatorSMM10pre_commitEPNS_9TrxHandleEP14wsrep_trx_meta+0x13c)[0x7fa43bc47c06]
/opt/mariadb/lib/galera/libgalera_smm.so(galera_pre_commit+0x215)[0x7fa43bc6302b]
/opt/mariadb/bin/mysqld(wsrep_run_wsrep_commit+0x913)[0x6f4563]
/opt/mariadb/bin/mysqld[0x6f4ef8]
/opt/mariadb/bin/mysqld(_Z15ha_commit_transP3THDb+0x1aa)[0x76fd5a]
/opt/mariadb/bin/mysqld(_Z21trans_commit_implicitP3THD+0x70)[0x69fc70]
/opt/mariadb/bin/mysqld(_ZN13select_create8send_eofEv+0x22f)[0x5996af]
/opt/mariadb/bin/mysqld[0x5f93b7]
/opt/mariadb/bin/mysqld(_ZN4JOIN10exec_innerEv+0xe5e)[0x609f2e]
/opt/mariadb/bin/mysqld(_Z12mysql_selectP3THDPPP4ItemP10TABLE_LISTjR4ListIS1_ES2_jP8st_orderSB_S2_SB_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x1dc)[0x6085ec]
/opt/mariadb/bin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x250)[0x60c1e0]
/opt/mariadb/bin/mysqld(_Z21mysql_execute_commandP3THD+0x8d92)[0x5bb342]
/opt/mariadb/bin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_state+0x34e)[0x5bbcee]
/opt/mariadb/bin/mysqld[0x5bbd88]
/opt/mariadb/bin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x15db)[0x5bdf4b]
/opt/mariadb/bin/mysqld(_Z10do_commandP3THD+0x157)[0x5befa7]
/opt/mariadb/bin/mysqld(_Z24do_handle_one_connectionP3THD+0x183)[0x68eb73]
/opt/mariadb/bin/mysqld(handle_one_connection+0x42)[0x68ed82]
/lib64/libpthread.so.0(+0x7dc5)[0x7fa43fb36dc5]
/lib64/libc.so.6(clone+0x6d)[0x7fa43ea13ced]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x7fa3fe822020): is an invalid pointer
Connection ID (thread ID): 218
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_wi
th_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,orderby_uses_equalities=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.

We think the query pointer is invalid, but we will try to print it anyway.
Query: CREATE TABLE DP_ORDERBY_BACKUP AS SELECT * FROM DP_ORDERBY