Jul  2 08:45:25 big-galera-01 mysqld[542]: 2018-07-02 08:45:25 7fa717316b00  InnoDB: Assertion failure in thread 140355625380608 in file row0mysql.cc line 4743
Jul  2 08:45:25 big-galera-01 mysqld[542]: InnoDB: Failing assertion: memcmp(table_name, name, namelen) == 0
Jul  2 08:45:25 big-galera-01 mysqld[542]: InnoDB: We intentionally generate a memory trap.
Jul  2 08:45:25 big-galera-01 mysqld[542]: InnoDB: Submit a detailed bug report to https://jira.mariadb.org/
Jul  2 08:45:25 big-galera-01 mysqld[542]: InnoDB: If you get repeated assertion failures or crashes, even
Jul  2 08:45:25 big-galera-01 mysqld[542]: InnoDB: immediately after the mysqld startup, there may be
Jul  2 08:45:25 big-galera-01 mysqld[542]: InnoDB: corruption in the InnoDB tablespace. Please refer to
Jul  2 08:45:25 big-galera-01 mysqld[542]: InnoDB: http://dev.mysql.com/doc/refman/5.6/en/forcing-innodb-recovery.html
Jul  2 08:45:25 big-galera-01 mysqld[542]: InnoDB: about forcing recovery.
Jul  2 08:45:25 big-galera-01 mysqld[542]: 180702  8:45:25 [ERROR] mysqld got signal 6 ;
Jul  2 08:45:25 big-galera-01 mysqld[542]: This could be because you hit a bug. It is also possible that this binary
Jul  2 08:45:25 big-galera-01 mysqld[542]: or one of the libraries it was linked against is corrupt, improperly built,
Jul  2 08:45:25 big-galera-01 mysqld[542]: or misconfigured. This error can also be caused by malfunctioning hardware.
Jul  2 08:45:25 big-galera-01 mysqld[542]: To report this bug, see https://mariadb.com/kb/en/reporting-bugs
Jul  2 08:45:25 big-galera-01 mysqld[542]: We will try our best to scrape up some info that will hopefully help
Jul  2 08:45:25 big-galera-01 mysqld[542]: diagnose the problem, but since we have already crashed,
Jul  2 08:45:25 big-galera-01 mysqld[542]: something is definitely wrong and this may fail.
Jul  2 08:45:25 big-galera-01 mysqld[542]: Server version: 10.1.32-MariaDB-1~xenial
Jul  2 08:45:25 big-galera-01 mysqld[542]: key_buffer_size=134217728
Jul  2 08:45:25 big-galera-01 mysqld[542]: read_buffer_size=2097152
Jul  2 08:45:25 big-galera-01 mysqld[542]: max_used_connections=88
Jul  2 08:45:25 big-galera-01 mysqld[542]: max_threads=302
Jul  2 08:45:25 big-galera-01 mysqld[542]: thread_count=48
Jul  2 08:45:25 big-galera-01 mysqld[542]: It is possible that mysqld could use up to
Jul  2 08:45:25 big-galera-01 mysqld[542]: key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 3229816 K  bytes of memory
Jul  2 08:45:25 big-galera-01 mysqld[542]: Hope that's ok; if not, decrease some variables in the equation.
Jul  2 08:45:25 big-galera-01 mysqld[542]: Thread pointer: 0x7fa66c05a008
Jul  2 08:45:25 big-galera-01 mysqld[542]: Attempting backtrace. You can use the following information to find out
Jul  2 08:45:25 big-galera-01 mysqld[542]: where mysqld died. If you see no messages after this, something went
Jul  2 08:45:25 big-galera-01 mysqld[542]: terribly wrong...
Jul  2 08:45:25 big-galera-01 mysqld[542]: stack_bottom = 0x7fa7173160b8 thread_stack 0x48400
Jul  2 08:45:25 big-galera-01 mysqld[542]: /usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x55f3a78eb01e]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /usr/sbin/mysqld(handle_fatal_signal+0x2f5)[0x55f3a74321d5]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fb85e8bc390]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7fb85de8b428]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7fb85de8d02a]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /usr/sbin/mysqld(+0x8dc403)[0x55f3a776c403]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /usr/sbin/mysqld(+0x81c9e6)[0x55f3a76ac9e6]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /usr/sbin/mysqld(+0x5a256f)[0x55f3a743256f]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /usr/sbin/mysqld(_Z24plugin_foreach_with_maskP3THDPFcS0_P13st_plugin_intPvEijS3_+0x1c8)[0x55f3a72ae728]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /usr/sbin/mysqld(+0x3e62bb)[0x55f3a72762bb]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /usr/sbin/mysqld(_Z21mysql_execute_commandP3THD+0x609d)[0x55f3a72a11ad]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /usr/sbin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_state+0x311)[0x55f3a72a44d1]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /usr/sbin/mysqld(+0x414e35)[0x55f3a72a4e35]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1ea5)[0x55f3a72a7485]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /usr/sbin/mysqld(_Z10do_commandP3THD+0x219)[0x55f3a72a8439]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /usr/sbin/mysqld(_Z24do_handle_one_connectionP3THD+0x182)[0x55f3a7376dd2]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /usr/sbin/mysqld(handle_one_connection+0x40)[0x55f3a7376f70]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /lib/x86_64-linux-gnu/libpthread.so.0(+0x76ba)[0x7fb85e8b26ba]
Jul  2 08:45:25 big-galera-01 mysqld[542]: /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7fb85df5d41d]
Jul  2 08:45:25 big-galera-01 mysqld[542]: Trying to get some variables.
Jul  2 08:45:25 big-galera-01 mysqld[542]: Some pointers may be invalid and cause the dump to abort.
Jul  2 08:45:25 big-galera-01 mysqld[542]: Query (0x7fa6f282f020): DROP DATABASE `example-net`
Jul  2 08:45:25 big-galera-01 mysqld[542]: Connection ID (thread ID): 6303541
Jul  2 08:45:25 big-galera-01 mysqld[542]: Status: NOT_KILLED
Jul  2 08:45:25 big-galera-01 mysqld[542]: 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,l$
Jul  2 08:45:25 big-galera-01 mysqld[542]: The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
Jul  2 08:45:25 big-galera-01 mysqld[542]: information that should help you find out what is causing the crash.
Jul  2 08:45:26 big-galera-01 systemd[1]: mariadb.service: Main process exited, code=killed, status=6/ABRT
Jul  2 08:45:26 big-galera-01 systemd[1]: mariadb.service: Unit entered failed state.
Jul  2 08:45:26 big-galera-01 systemd[1]: mariadb.service: Failed with result 'signal'.
Jul  2 08:45:31 big-galera-01 systemd[1]: mariadb.service: Service hold-off time over, scheduling restart.