Hi all, Patching one of our spare servers this morning and ran into a couple of issues. The first was a complaint in the service status: mariadb.service: Referenced but unset environment variable evaluates to an empty string: MYSQLD_OPTS, _WSREP_NEW_CLUSTER Which was fixed by running systemctl edit mariadb.service and adding Environment="MYSQLD_OPTS=" Environment="_WSREP_NEW_CLUSTER=" to the end of the file. The second was from the error log which stated that the service was unable to read /etc/mysql/rest/keyfile.passwd, which turned out to be a permissions error on /etc/mysql/rest which was 600 and not 700 (I checked the other servers and theirs were also 600 so I guess it's the fix for MDEV-36229 which caused that) Now the server starts but it core dumps almost immediately. Systemctl status shows: ● mariadb.service - MariaDB 11.4.7 database server Loaded: loaded (/usr/lib/systemd/system/mariadb.service; enabled; preset: enabled) Drop-In: /etc/systemd/system/mariadb.service.d └─migrated-from-my.cnf-settings.conf, override.conf Active: activating (auto-restart) (Result: core-dump) since Sat 2025-06-07 12:45:30 UTC; 1s ago Docs: man:mariadbd(8) https://mariadb.com/kb/en/library/systemd/ Process: 26495 ExecStartPre=/usr/bin/install -m 755 -o mysql -g root -d /var/run/mysqld (code=exited, status=0/SUCCESS) Process: 26497 ExecStartPre=/bin/sh -c systemctl unset-environment _WSREP_START_POSITION (code=exited, status=0/SUCCESS) Process: 26500 ExecStartPre=/bin/sh -c [ ! -e /usr/bin/galera_recovery ] && VAR= || VAR=`/usr/bin/galera_recovery`; [ $? -eq 0 ] && systemctl set-environment _WSREP_START_POSITION=$VAR || exit 1 (code=exited, status=0/SUCCESS) Process: 26684 ExecStart=/usr/sbin/mariadbd $MYSQLD_OPTS $_WSREP_NEW_CLUSTER $_WSREP_START_POSITION (code=dumped, signal=SEGV) Main PID: 26684 (code=dumped, signal=SEGV) CPU: 1.136s and error log shows 2025-06-07 12:33:57 0 [Note] Starting MariaDB 11.4.7-MariaDB-ubu2404-log source revision 118cfcf82107188f2295631193658b2ef94f4f3f server_uid 7bAWQJ3wkO2Wd/rTUTlrW6jyD3E= as process 4209 2025-06-07 12:33:57 0 [Note] InnoDB: Compressed tables use zlib 1.3 2025-06-07 12:33:57 0 [Note] InnoDB: Number of transaction pools: 1 2025-06-07 12:33:57 0 [Note] InnoDB: Using crc32 + pclmulqdq instructions 2025-06-07 12:33:57 0 [Note] InnoDB: Using liburing 2025-06-07 12:33:57 0 [Note] InnoDB: innodb_buffer_pool_size_max=22528m, innodb_buffer_pool_size=22528m 2025-06-07 12:33:58 0 [Note] InnoDB: Initialized memory pressure event listener 2025-06-07 12:33:58 0 [Note] InnoDB: Completed initialization of buffer pool 2025-06-07 12:33:58 0 [Note] InnoDB: File system buffers for log disabled (block size=512 bytes) 2025-06-07 12:33:58 0 [Note] InnoDB: Resetting space id's in the doublewrite buffer 2025-06-07 12:33:58 0 [Note] InnoDB: End of log at LSN=43439159458895 2025-06-07 12:33:58 0 [Note] InnoDB: Opened 3 undo tablespaces 2025-06-07 12:33:58 0 [Note] InnoDB: 128 rollback segments in 3 undo tablespaces are active. 2025-06-07 12:33:58 0 [Warning] InnoDB: Cannot free the unused segments in system tablespace because a previous shutdown was not with innodb_fast_shutdown=0 or XA PREPARE transactions exist 2025-06-07 12:33:58 0 [Note] InnoDB: System tablespace defragmentation process starts 2025-06-07 12:33:58 0 [Note] InnoDB: Moving the data from extents 15552 through 2452672 250607 12:33:58 [ERROR] /usr/sbin/mariadbd got signal 11 ; Sorry, we probably made a mistake, and this is a bug. Your assistance in bug reporting will enable us to fix this for the next release. To report this bug, see https://mariadb.com/kb/en/reporting-bugs about how to report a bug on https://jira.mariadb.org/. Please include the information from the server start above, to the end of the information below. Server version: 11.4.7-MariaDB-ubu2404-log source revision: 118cfcf82107188f2295631193658b2ef94f4f3f The information page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mariadbd/ contains instructions to obtain a better version of the backtrace below. Following these instructions will help MariaDB developers provide a fix quicker. Attempting backtrace. Include this in the bug report. (note: Retrieving this information may fail) Thread pointer: 0x0 stack_bottom = 0x0 thread_stack 0x30000 /usr/sbin/mariadbd(my_print_stacktrace+0x30)[0x5a41189db560] /usr/sbin/mariadbd(handle_fatal_signal+0x2a1)[0x5a4118574ae1] /lib/x86_64-linux-gnu/libc.so.6(+0x45330)[0x7650bf845330] /usr/sbin/mariadbd(+0x636615)[0x5a41180bb615] /usr/sbin/mariadbd(+0x1043036)[0x5a4118ac8036] /usr/sbin/mariadbd(+0xec468d)[0x5a411894968d] /usr/sbin/mariadbd(+0x622c5a)[0x5a41180a7c5a] /usr/sbin/mariadbd(+0xd9b926)[0x5a4118820926] /usr/sbin/mariadbd(_Z24ha_initialize_handlertonPv+0x8c)[0x5a411857717c] /usr/sbin/mariadbd(+0x8165b3)[0x5a411829b5b3] /usr/sbin/mariadbd(+0x8167a7)[0x5a411829b7a7] /usr/sbin/mariadbd(_Z11plugin_initPiPPci+0xbfc)[0x5a41182a1e3c] /usr/sbin/mariadbd(+0x6bbd65)[0x5a4118140d65] /usr/sbin/mariadbd(_Z11mysqld_mainiPPc+0xf79)[0x5a4118144f79] /lib/x86_64-linux-gnu/libc.so.6(+0x2a1ca)[0x7650bf82a1ca] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x8b)[0x7650bf82a28b] /usr/sbin/mariadbd(_start+0x25)[0x5a411811e865] Writing a core file... Working directory at /var/lib/mysql Resource Limits (excludes unlimited resources): Limit Soft Limit Hard Limit Units Max stack size 8388608 unlimited bytes Max core file size 0 unlimited bytes Max processes 139959 139959 processes Max open files 1048576 1048576 files Max locked memory 524288 524288 bytes Max pending signals 139959 139959 signals Max msgqueue size 819200 819200 bytes Max nice priority 0 0 Max realtime priority 0 0 Core pattern: |/usr/share/apport/apport -p%p -s%s -c%c -d%d -P%P -u%u -g%g -F%F -- %E Kernel version: Linux version 6.8.0-60-generic (buildd@lcy02-amd64-054) (x86_64-linux-gnu-gcc-13 (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0, GNU ld (GNU Binutils for Ubuntu) 2.42) #63-Ubuntu SMP PREEMPT_DYNAMIC Tue Apr 15 19:04:15 UTC 2025 Is there anything I'm missing before I raise this as a bug? Kind regards Derick -- Derick Turner - He/Him Managing Director e-Learn Design Ltd | Scotland's Moodle Partner T +44 (0)845 474 4512 | M +44 (0)7808 068 797 |www.e-learndesign.co.uk