2017-11-27 8:02:42 140638571270720 [Note] InnoDB: innodb_empty_free_list_algorithm has been changed to legacy because of small buffer pool size. In order to use backoff, increase buffer pool at least up to 20MB.
2017-11-27 8:02:42 140638571270720 [Note] InnoDB: Using mutexes to ref count buffer pool pages
2017-11-27 8:02:42 140638571270720 [Note] InnoDB: The InnoDB memory heap is disabled
2017-11-27 8:02:42 140638571270720 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2017-11-27 8:02:42 140638571270720 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2017-11-27 8:02:42 140638571270720 [Note] InnoDB: Compressed tables use zlib 1.2.8
2017-11-27 8:02:42 140638571270720 [Note] InnoDB: Using Linux native AIO
2017-11-27 8:02:42 140638571270720 [Note] InnoDB: Using SSE crc32 instructions
2017-11-27 8:02:42 140638571270720 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2017-11-27 8:02:42 140638571270720 [Note] InnoDB: Completed initialization of buffer pool
2017-11-27 8:02:42 140638571270720 [Note] InnoDB: Highest supported file format is Barracuda.
2017-11-27 8:02:42 140638571270720 [Note] InnoDB: Starting crash recovery from checkpoint LSN=92475379
2017-11-27 8:02:42 140638571270720 [Note] InnoDB: Restoring possible half-written data pages from the doublewrite buffer...
InnoDB: 2 transaction(s) which must be rolled back or cleaned up
InnoDB: in total 0 row operations to undo
InnoDB: Trx id counter is 140544
2017-11-27 8:02:42 140638571270720 [Note] InnoDB: Starting final batch to recover 10 pages from redo log
InnoDB: Cleaning up trx with id 140121
2017-11-27 08:02:43 7fe8f8151240 InnoDB: Assertion failure in thread 140638571270720 in file trx0trx.cc line 468
InnoDB: Failing assertion: trx->update_undo == NULL
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.
171127 8:02:43 [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: 10.1.26-MariaDB-0+deb9u1
key_buffer_size=16777216
read_buffer_size=131072
max_used_connections=0
max_threads=153
thread_count=0
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 352445 K bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
Thread pointer: 0x0
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 = 0x0 thread_stack 0x30000
/usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x55566218b36e]
/usr/sbin/mysqld(handle_fatal_signal+0x3bd)[0x555661cd0a4d]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x110c0)[0x7fe8f7dbd0c0]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcf)[0x7fe8f66b7fcf]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7fe8f66b93fa]
/usr/sbin/mysqld(+0x929c12)[0x555662057c12]
/usr/sbin/mysqld(+0x91f1b5)[0x55566204d1b5]
/usr/sbin/mysqld(+0x87c6df)[0x555661faa6df]
/usr/sbin/mysqld(+0x90ae06)[0x555662038e06]
/usr/sbin/mysqld(+0x8214ef)[0x555661f4f4ef]
/usr/sbin/mysqld(_Z24ha_initialize_handlertonP13st_plugin_int+0x66)[0x555661cd2b86]
/usr/sbin/mysqld(+0x422e55)[0x555661b50e55]
/usr/sbin/mysqld(_Z11plugin_initPiPPci+0x7da)[0x555661b5248a]
/usr/sbin/mysqld(+0x37afa3)[0x555661aa8fa3]
/usr/sbin/mysqld(_Z11mysqld_mainiPPc+0x1a0d)[0x555661aac78d]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf1)[0x7fe8f66a52b1]
/usr/sbin/mysqld(_start+0x2a)[0x555661aa0c4a]
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.