Re: [Maria-discuss] mariadb crash und recovery

Hi, I had a bit of a search in https://jira.mariadb.org and didn't see any obvious things reported that indicate its known or fixed. A cleaner backtrace with debug info packages and the core file generated (if possible/reproducable) would be of assistance. debuginfo: https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/#inst... full backtrace: https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/#anal... Also the "SHOW CREATE TABLE messwerte" information would be useful in identifying features that might have contributed towards this bug. How long have you been running 10.5.15 and inserting into this table? Was there a previous version you ran? Did this problem occur then? Does dmesg show any kernel or filesystem errors? Further information in a bug report https://jira.mariadb.org or here welcome. Daniel Black On Mon, Apr 17, 2023 at 9:05 PM wrote:

Hello list, i had a crash at weekend with no apparend cause. The aria engine did a recovery without furture problems. Maybe that is a hint that somebody can make use of. Hints welcome.

CU

from log:

230416 7:20:17 [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: 10.5.15-MariaDB-0+deb11u1-log key_buffer_size=134217728 read_buffer_size=131072 max_used_connections=86 max_threads=252 thread_count=38 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 685818 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. Thread pointer: 0x7f01e4000c58 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 = 0x7f02b6894d38 thread_stack 0x49000 ??:0(my_print_stacktrace)[0x5559d92bb54e] ??:0(handle_fatal_signal)[0x5559d8dbaf65] sigaction.c:0(__restore_rt)[0x7f043591a140] ??:0(_ma_state_info_write)[0x5559d8fafc73] ??:0(_ma_state_info_write)[0x5559d8fb1737] ??:0(_ma_state_info_write)[0x5559d8fb946c] ??:0(handler::ha_write_row(unsigned char const*))[0x5559d8dc7aa8] ??:0(MyCTX_nopad::finish(unsigned char*, unsigned int*))[0x5559d8ff40da] ??:0(handler::ha_write_row(unsigned char const*))[0x5559d8dc7aa8] ??:0(write_record(THD*, TABLE*, st_copy_info*, select_result*))[0x5559d8b8787d] ??:0(mysql_insert(THD*, TABLE_LIST*, List<Item>&, List&, List<Item>&, List<Item>&, enum_duplicates, bool, select _result*))[0x5559d8b8f8a4] ??:0(mysql_execute_command(THD*))[0x5559d8bc2716] ??:0(mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool))[0x5559d8bc65db] ??:0(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool))[0x5559d8bc8a5d] ??:0(do_command(THD*))[0x5559d8bca2de] ??:0(do_handle_one_connection(CONNECT*, bool))[0x5559d8cbbfb2] ??:0(handle_one_connection)[0x5559d8cbc22d] ??:0(MyCTX_nopad::finish(unsigned char*, unsigned int*))[0x5559d8ff811b] nptl/pthread_create.c:478(start_thread)[0x7f043590eea7] x86_64/clone.S:97(__GI___clone)[0x7f0435525def]

Trying to get some variables. Some pointers may be invalid and cause the dump to abort. Query (0x7f01e4010440): INSERT INTO messwerte VALUES ( 83110995 , 1200 , 909 , 331 , '2023-04-16 05:20:00' , '2023-04-16 05: 20:00' , 0.0703000000000000013766765505351941101253032684326171875 , 0.001000000000000000020816681711721685132943093776702880 859375 , 0 , 0 , 0 , 0 , 60 , 0 )

Connection ID (thread ID): 5463672 Status: NOT_KILLED

Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_ intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=o n,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subque ry_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_increment al=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on,table_elimination=on,extended_keys=on,exists_to_in= on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowi d_filter=on,condition_pushdown_from_having=on,not_null_range_scan=off

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 /home/kpc/kpc.dbs 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 127976 127976 processes Max open files 32313 32313 files Max locked memory 65536 65536 bytes Max address space unlimited unlimited bytes Max file locks unlimited unlimited locks Max pending signals 127976 127976 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

230416 07:20:19 mysqld_safe Number of processes running now: 0 230416 07:20:19 mysqld_safe mysqld restarted 2023-04-16 7:20:19 0 [Note] /usr/sbin/mariadbd (mysqld 10.5.15-MariaDB-0+deb11u1-log) starting as process 415 ... 2023-04-16 7:20:20 0 [Note] mariadbd: Aria engine: starting recovery recovered pages: 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% (0.0 seconds); tables to flush: 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 (0.1 seconds); 2023-04-16 7:20:20 0 [Note] mariadbd: Aria engine: recovery done

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