2023-08-31 1:09:15 0 [Warning] Aborted connection 0 to db: 'unconnected' user: 'unauthenticated' host: 'connecting host' (Too many connections) 2023-08-31 1:09:15 0 [Warning] Aborted connection 0 to db: 'unconnected' user: 'unauthenticated' host: 'connecting host' (Too many connections) 2023-08-31 1:09:15 0 [Warning] Aborted connection 0 to db: 'unconnected' user: 'unauthenticated' host: 'connecting host' (Too many connections) 2023-08-31 1:09:15 0 [Warning] Aborted connection 0 to db: 'unconnected' user: 'unauthenticated' host: 'connecting host' (Too many connections) 2023-08-31 1:09:15 0 [Warning] Aborted connection 0 to db: 'unconnected' user: 'unauthenticated' host: 'connecting host' (Too many connections) 2023-08-31 1:09:16 0 [Warning] Aborted connection 0 to db: 'unconnected' user: 'unauthenticated' host: 'connecting host' (Too many connections) 2023-08-31 1:09:17 0 [Warning] Aborted connection 0 to db: 'unconnected' user: 'unauthenticated' host: 'connecting host' (Too many connections) 2023-08-31 1:09:17 0 [Warning] Aborted connection 0 to db: 'unconnected' user: 'unauthenticated' host: 'connecting host' (Too many connections) 2023-08-31 1:09:17 0 [Warning] Aborted connection 0 to db: 'unconnected' user: 'unauthenticated' host: 'connecting host' (Too many connections) 2023-08-31 1:09:17 0 [Warning] Aborted connection 0 to db: 'unconnected' user: 'unauthenticated' host: 'connecting host' (Too many connections) 2023-08-31 1:09:18 0 [Warning] Aborted connection 0 to db: 'unconnected' user: 'unauthenticated' host: 'connecting host' (Too many connections) 2023-08-31 1:09:18 0 [Warning] Aborted connection 0 to db: 'unconnected' user: 'unauthenticated' host: 'connecting host' (Too many connections) 2023-08-31 1:09:19 0 [Warning] Aborted connection 0 to db: 'unconnected' user: 'unauthenticated' host: 'connecting host' (Too many connections) 2023-08-31 1:09:19 0 [Warning] Aborted connection 0 to db: 'unconnected' user: 'unauthenticated' host: 'connecting host' (Too many connections) 2023-08-31 1:09:20 0 [Warning] Aborted connection 0 to db: 'unconnected' user: 'unauthenticated' host: 'connecting host' (Too many connections) 2023-08-31 1:09:20 0 [Warning] Aborted connection 0 to db: 'unconnected' user: 'unauthenticated' host: 'connecting host' (Too many connections) 2023-08-31 1:09:20 0 [Note] mariadbd (initiated by: unknown): Normal shutdown 2023-08-31 1:09:26 0 [ERROR] [FATAL] InnoDB: innodb_fatal_semaphore_wait_threshold was exceeded for dict_sys.latch. Please refer to https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/ 230831 1:09:26 [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: 10.6.16-MariaDB-1:10.6.16+maria~ubu2004-log source revision: 07494006dd0887ebfb31564a8fd4c59cf1b299e9 key_buffer_size=10485760 read_buffer_size=2097152 max_used_connections=301 max_threads=302 thread_count=290 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 1255123 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 Printing to addr2line failed mariadbd(my_print_stacktrace+0x32)[0x561122b0e302] mariadbd(handle_fatal_signal+0x485)[0x5611225c8375] /lib/x86_64-linux-gnu/libpthread.so.0(+0x14420)[0x7feb60b1e420] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcb)[0x7feb6062200b] /lib/x86_64-linux-gnu/libc.so.6(abort+0x12b)[0x7feb60601859] mariadbd(+0x66e943)[0x561122238943] mariadbd(+0x666c1d)[0x561122230c1d] mariadbd(_ZN5tpool19thread_pool_generic13timer_generic7executeEPv+0x3d)[0x561122aa259d] mariadbd(_ZN5tpool4task7executeEv+0x3a)[0x561122aa336a] mariadbd(_ZN5tpool19thread_pool_generic11worker_mainEPNS_11worker_dataE+0x57)[0x561122aa0d27] /lib/x86_64-linux-gnu/libstdc++.so.6(+0xd6df4)[0x7feb609f8df4] /lib/x86_64-linux-gnu/libpthread.so.0(+0x8609)[0x7feb60b12609] /lib/x86_64-linux-gnu/libc.so.6(clone+0x43)[0x7feb606fe133] 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 unlimited unlimited bytes Max resident set unlimited unlimited bytes Max processes unlimited unlimited 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 152839 152839 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 Kernel version: Linux version 5.15.0-67-generic (buildd@lcy02-amd64-116) (gcc (Ubuntu 11.3.0-1ubuntu1~22.04) 11.3.0, GNU ld (GNU Binutils for Ubuntu) 2.38) #74-Ubuntu SMP Wed Feb 22 14:14:39 UTC 2023 Fatal signal 11 while backtracing