# mysqld --user=mysql [35/218] 2020-05-15 16:35:37 0 [Note] mysqld (mysqld 10.4.13-MariaDB) starting as process 3068 ... 2020-05-15 16:35:37 0 [Note] InnoDB: Using Linux native AIO 2020-05-15 16:35:37 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins 2020-05-15 16:35:37 0 [Note] InnoDB: Uses event mutexes 2020-05-15 16:35:37 0 [Note] InnoDB: Compressed tables use zlib 1.2.7 2020-05-15 16:35:37 0 [Note] InnoDB: Number of pools: 1 2020-05-15 16:35:37 0 [Note] InnoDB: Using SSE2 crc32 instructions 2020-05-15 16:35:37 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M 2020-05-15 16:35:37 0 [Note] InnoDB: Completed initialization of buffer pool 2020-05-15 16:35:37 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority(). 2020-05-15 16:35:37 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=27331596 2020-05-15 16:35:37 0 [Note] InnoDB: Starting final batch to recover 13 pages from redo log. 2020-05-15 16:35:38 0 [Note] InnoDB: 128 out of 128 rollback segments are active. 2020-05-15 16:35:38 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1" 2020-05-15 16:35:38 0 [Note] InnoDB: Creating shared tablespace for temporary tables 2020-05-15 16:35:38 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ... 2020-05-15 16:35:38 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB. 2020-05-15 16:35:38 0 [Note] InnoDB: Waiting for purge to start 2020-05-15 16:35:38 0 [Note] InnoDB: 10.4.13 started; log sequence number 27340253; transaction id 2263 2020-05-15 16:35:38 0 [Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool 2020-05-15 16:35:38 0 [Note] InnoDB: Cannot open '/var/lib/mysql/ib_buffer_pool' for reading: No such file or directory 2020-05-15 16:35:38 0 [Note] Plugin 'FEEDBACK' is disabled. 2020-05-15 16:35:38 0 [Note] Server socket created on IP: '::'. 200515 16:35:38 [ERROR] mysqld got signal 11 ; 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: 10.4.13-MariaDB key_buffer_size=134217728 read_buffer_size=131072 max_used_connections=0 max_threads=153 thread_count=6 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 467752 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. Thread pointer: 0x55ef046f19b8 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 = 0x7fff9b172610 thread_stack 0x49000 addr2line: 'mysqld': No such file mysqld(my_print_stacktrace+0x2e)[0x55ef014266ce] mysqld(handle_fatal_signal+0x30f)[0x55ef00ebcf7f] sigaction.c:0(__restore_rt)[0x7f269cf54630] addr2line: 'mysqld': No such file mysqld(+0x620ae9)[0x55ef00c2dae9] mysqld(_Z10acl_reloadP3THD+0xcd6)[0x55ef00c37fc6] mysqld(_Z8acl_initb+0x163)[0x55ef00c39023] mysqld(_Z11mysqld_mainiPPc+0x9b7)[0x55ef00bfb4a7] /lib64/libc.so.6(__libc_start_main+0xf5)[0x7f269b211555] addr2line: 'mysqld': No such file mysqld(+0x5e2024)[0x55ef00bef024] Trying to get some variables. Some pointers may be invalid and cause the dump to abort. Query (0x0): is an invalid pointer Connection ID (thread ID): 0 Status: NOT_KILLED Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersect ion=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,mat erialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cos t_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cach e_bka=on,optimize_join_buffer_size=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushd own_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on 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. We think the query pointer is invalid, but we will try to print it anyway. Query: 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 278528 278528 processes Max open files 32186 32186 files Max locked memory 65536 65536 bytes Max address space unlimited unlimited bytes Max file locks unlimited unlimited locks Max pending signals 15637 15637 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: co... Segmentation fault