MariaDB Error Log When Changing Table Engine from MyISAM to InnoDB

myisam_to_innodb_error.log

2020-12-14 15:14:41 0 [ERROR] [FATAL] InnoDB: fsync() returned 5
201214 15:14:41 [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: 10.3.25-MariaDB-0ubuntu0.20.04.1
key_buffer_size=536870912
read_buffer_size=131072
max_used_connections=0
max_threads=12
thread_count=0
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 550647 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 0x49000
/usr/sbin/mysqld(my_print_stacktrace+0x32)[0x55f107506c52]
/usr/sbin/mysqld(handle_fatal_signal+0x55d)[0x55f10700407d]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x153c0)[0x7fed05e223c0]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcb)[0x7fed0593118b]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x12b)[0x7fed05910859]
/usr/sbin/mysqld(+0x4e7ae7)[0x55f106d24ae7]
/usr/sbin/mysqld(+0x4ca702)[0x55f106d07702]
/usr/sbin/mysqld(+0xb08b70)[0x55f107345b70]
/usr/sbin/mysqld(+0xb0b22d)[0x55f10734822d]
/usr/sbin/mysqld(+0x9b5f39)[0x55f1071f2f39]
/usr/sbin/mysqld(+0x9b6ade)[0x55f1071f3ade]
/usr/sbin/mysqld(+0xa724a1)[0x55f1072af4a1]
/usr/sbin/mysqld(+0xa732f3)[0x55f1072b02f3]
/usr/sbin/mysqld(+0xa734a7)[0x55f1072b04a7]
/usr/sbin/mysqld(+0xafd30e)[0x55f10733a30e]
/usr/sbin/mysqld(+0xafe50d)[0x55f10733b50d]
/usr/sbin/mysqld(+0xa1800d)[0x55f10725500d]
/usr/sbin/mysqld(+0xa1a491)[0x55f107257491]
/usr/sbin/mysqld(+0x9bce1e)[0x55f1071f9e1e]
/usr/sbin/mysqld(+0x4e0e4d)[0x55f106d1de4d]
/usr/sbin/mysqld(+0x95ce08)[0x55f107199e08]
/usr/sbin/mysqld(_Z24ha_initialize_handlertonP13st_plugin_int+0x70)[0x55f1070067c0]
/usr/sbin/mysqld(+0x5eea75)[0x55f106e2ba75]
/usr/sbin/mysqld(_Z11plugin_initPiPPci+0x88e)[0x55f106e2cb8e]
/usr/sbin/mysqld(+0x524364)[0x55f106d61364]
/usr/sbin/mysqld(_Z11mysqld_mainiPPc+0x401)[0x55f106d68211]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0x7fed059120b3]
/usr/sbin/mysqld(_start+0x2e)[0x55f106d5b1ce]
The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/ contains
information that should help you find out what is causing the crash.
Writing a core file...
Working directory at /var/lib/mysql
Resource Limits:
Limit                     Soft Limit           Hard Limit           Units
Max cpu time              unlimited            unlimited            seconds
Max file size             unlimited            unlimited            bytes
Max data size             unlimited            unlimited            bytes
Max stack size            8388608              unlimited            bytes
Max core file size        0                    unlimited            bytes
Max resident set          unlimited            unlimited            bytes
Max processes             514136               514136               processes
Max open files            1048576              1048576              files
Max locked memory         unlimited            unlimited            bytes
Max address space         unlimited            unlimited            bytes
Max file locks            unlimited            unlimited            locks
Max pending signals       514136               514136               signals
Max msgqueue size         819200               819200               bytes
Max nice priority         0                    0
Max realtime priority     0                    0
Max realtime timeout      unlimited            unlimited            us
Core pattern: core

2020-12-14 15:15:00 0 [Note] InnoDB: Using Linux native AIO
2020-12-14 15:15:00 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-12-14 15:15:00 0 [Note] InnoDB: Uses event mutexes
2020-12-14 15:15:00 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-12-14 15:15:00 0 [Note] InnoDB: Number of pools: 1
2020-12-14 15:15:00 0 [Note] InnoDB: Using SSE2 crc32 instructions
2020-12-14 15:15:00 0 [Note] InnoDB: Initializing buffer pool, total size = 8G, instances = 8, chunk size = 128M
2020-12-14 15:15:00 0 [Note] InnoDB: Completed initialization of buffer pool
2020-12-14 15:15:00 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-12-14 15:15:00 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=1198558467
2020-12-14 15:15:00 0 [Note] InnoDB: Starting final batch to recover 2750 pages from redo log.
2020-12-14 15:15:01 0 [Note] InnoDB: 128 out of 128 rollback segments are active.
2020-12-14 15:15:01 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1"
2020-12-14 15:15:01 0 [Note] InnoDB: Creating shared tablespace for temporary tables
2020-12-14 15:15:01 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
2020-12-14 15:15:01 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
2020-12-14 15:15:01 0 [Note] InnoDB: Waiting for purge to start
2020-12-14 15:15:01 0 [Note] InnoDB: 10.3.25 started; log sequence number 1227677202; transaction id 3463448
2020-12-14 15:15:01 0 [Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool
2020-12-14 15:15:01 0 [Note] Plugin 'FEEDBACK' is disabled.
2020-12-14 15:15:01 0 [Note] Recovering after a crash using tc.log
2020-12-14 15:15:01 0 [Note] Starting crash recovery...
2020-12-14 15:15:01 0 [Note] Crash recovery finished.
2020-12-14 15:15:01 0 [Note] Server socket created on IP: '127.0.0.1'.
2020-12-14 15:15:01 0 [Note] Reading of all Master_info entries succeeded
2020-12-14 15:15:01 0 [Note] Added new Master_info '' to hash table
2020-12-14 15:15:01 0 [Note] /usr/sbin/mysqld: ready for connections.
Version: '10.3.25-MariaDB-0ubuntu0.20.04.1'  socket: '/run/mysqld/mysqld.sock'  port: 3306  Ubuntu 20.04
2020-12-14 15:15:01 0 [Note] InnoDB: Buffer pool(s) load completed at 201214 15:15:01