Aug 19 20:05:43 g2 mysqld[5046]: 160819 20:05:43 [ERROR] mysqld got signal 11 ;

Aug 19 20:05:43 g2 mysqld[5046]: This could be because you hit a bug. It is also possible that this binary

Aug 19 20:05:43 g2 mysqld[5046]: or one of the libraries it was linked against is corrupt, improperly built,

Aug 19 20:05:43 g2 mysqld[5046]: or misconfigured. This error can also be caused by malfunctioning hardware.

Aug 19 20:05:43 g2 mysqld[5046]: To report this bug, see https://mariadb.com/kb/en/reporting-bugs

Aug 19 20:05:43 g2 mysqld[5046]: We will try our best to scrape up some info that will hopefully help

Aug 19 20:05:43 g2 mysqld[5046]: diagnose the problem, but since we have already crashed,

Aug 19 20:05:43 g2 mysqld[5046]: something is definitely wrong and this may fail.

Aug 19 20:05:43 g2 mysqld[5046]: Server version: 10.1.16-MariaDB-1~xenial

Aug 19 20:05:43 g2 mysqld[5046]: key_buffer_size=134217728

Aug 19 20:05:43 g2 mysqld[5046]: read_buffer_size=2097152

Aug 19 20:05:43 g2 mysqld[5046]: max_used_connections=18

Aug 19 20:05:43 g2 mysqld[5046]: max_threads=102

Aug 19 20:05:43 g2 mysqld[5046]: thread_count=9

Aug 19 20:05:43 g2 mysqld[5046]: It is possible that mysqld could use up to

Aug 19 20:05:43 g2 mysqld[5046]: key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 759828 K  bytes of memory

Aug 19 20:05:43 g2 mysqld[5046]: Hope that's ok; if not, decrease some variables in the equation.

Aug 19 20:05:43 g2 mysqld[5046]: Thread pointer: 0x0x7f0927412008

Aug 19 20:05:43 g2 mysqld[5046]: Attempting backtrace. You can use the following information to find out

Aug 19 20:05:43 g2 mysqld[5046]: where mysqld died. If you see no messages after this, something went

Aug 19 20:05:43 g2 mysqld[5046]: terribly wrong...

Aug 19 20:05:43 g2 mysqld[5046]: stack_bottom = 0x7f0a7f34f0a8 thread_stack 0x48400

Aug 19 20:05:43 g2 mysqld[5046]: /usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x560fb73d15ee]

Aug 19 20:05:43 g2 mysqld[5046]: /usr/sbin/mysqld(handle_fatal_signal+0x2d5)[0x560fb6f20c25]

Aug 19 20:05:43 g2 mysqld[5046]: /lib/x86_64-linux-gnu/libpthread.so.0(+0x113d0)[0x7f0a7daa23d0]

Aug 19 20:05:43 g2 mysqld[5046]: /usr/sbin/mysqld(_ZN13MYSQL_BIN_LOG13mark_xid_doneEmb+0x7b)[0x560fb6fd563b]

Aug 19 20:05:43 g2 mysqld[5046]: /usr/sbin/mysqld(binlog_background_thread+0x2f3)[0x560fb6fd5b33]

Aug 19 20:05:43 g2 mysqld[5046]: /usr/sbin/mysqld(+0x703e41)[0x560fb7090e41]

Aug 19 20:05:43 g2 mysqld[5046]: /lib/x86_64-linux-gnu/libpthread.so.0(+0x76fa)[0x7f0a7da986fa]

Aug 19 20:05:43 g2 mysqld[5046]: /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f0a7d143b5d]

Aug 19 20:05:43 g2 mysqld[5046]: Trying to get some variables.

Aug 19 20:05:43 g2 mysqld[5046]: Some pointers may be invalid and cause the dump to abort.

Aug 19 20:05:43 g2 mysqld[5046]: Query (0x0):

Aug 19 20:05:43 g2 mysqld[5046]: Connection ID (thread ID): 3

Aug 19 20:05:43 g2 mysqld[5046]: Status: NOT_KILLED

Aug 19 20:05:43 g2 mysqld[5046]: 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=