/var/log/system.log says (over and over)
Oct 13 19:34:01 Data-Server com.apple.xpc.launchd[1] (com.mariadb.server[2128]): Service exited with abnormal code: 1
Oct 13 19:34:01 Data-Server com.apple.xpc.launchd[1] (com.mariadb.server): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
/usr/local/var/mysql/Data-Server.local.err says (once recently, repeated a number of times well before the crash)
2020-10-13 2:44:25 20019181 [Warning] Aborted connection 20019181 to db: 'EcoReality' user: 'root' host: '10.1.2.2' (Got timeout reading communication packets)
First thing I did was to shutdown the launchctl entry, to keep it from constantly restarting.
# launchctl unload /Library/LaunchDaemons/com.mariadb.server.plist
Then I tried invoking mysqld manually:
# sudo /usr/local/bin/mysqld -u mysql
2020-10-13 20:46:09 0 [Note] /usr/local/bin/mysqld (mysqld 10.4.6-MariaDB) starting as process 2364 ...
2020-10-13 20:46:09 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-10-13 20:46:09 0 [Note] InnoDB: Uses event mutexes
2020-10-13 20:46:09 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-10-13 20:46:09 0 [Note] InnoDB: Number of pools: 1
2020-10-13 20:46:09 0 [Note] InnoDB: Using SSE2 crc32 instructions
2020-10-13 20:46:09 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-10-13 20:46:09 0 [Note] InnoDB: Completed initialization of buffer pool
2020-10-13 20:46:09 0 [ERROR] InnoDB: Invalid log block checksum. block: 81635496 checkpoint no: 2609153 expected: 296846624 found: 3735928559
2020-10-13 20:46:09 0 [ERROR] InnoDB: Missing MLOG_CHECKPOINT at 41797373564 between the checkpoint 41797373564 and the end 41797373440.
2020-10-13 20:46:09 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-10-13 20:46:09 0 [Note] InnoDB: Starting shutdown...
2020-10-13 20:46:09 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-10-13 20:46:09 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-10-13 20:46:09 0 [Note] Plugin 'FEEDBACK' is disabled.
2020-10-13 20:46:09 0 [Note] CONNECT: Version 1.06.0009 January 27, 2019
2020-10-13 20:46:09 0 [ERROR] Unknown/unsupported storage engine: InnoDB
2020-10-13 20:46:09 0 [ERROR] Aborting
So now I'm a bit stumped at the lack of diagnostic messages. Is there any way to coax more info out of mysqld when it goes down? Or should I just start incrementing innodb_force_recovery until something interesting happens?
