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  1. MariaDB Server
  2. MDEV-11778

MariaDB crashes with signal 6

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      Hi Everyone,
      My MariaDB server crashes randomly with the following issues in var/mysql.log

       
      Jan 10 16:26:21 srvsvpext snmpd[1563]: message repeated 30 times: [ Connection from UDP: [10.10.64.254]:35711->[10.10.64.51]:161]
      Jan 10 16:26:22 srvsvpext snmpd[1563]: Connection from UDP: [10.10.64.254]:2659->[10.10.64.51]:161
      Jan 10 16:26:22 srvsvpext snmpd[1563]: message repeated 5 times: [ Connection from UDP: [10.10.64.254]:2659->[10.10.64.51]:161]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: pure virtual method called
      Jan 10 16:26:47 srvsvpext mysqld[1551]: terminate called without an active exception
      Jan 10 16:26:47 srvsvpext mysqld[1551]: 170110 16:26:47 [ERROR] mysqld got signal 6 ;
      Jan 10 16:26:47 srvsvpext mysqld[1551]: This could be because you hit a bug. It is also possible that this binary
      Jan 10 16:26:47 srvsvpext mysqld[1551]: or one of the libraries it was linked against is corrupt, improperly built,
      Jan 10 16:26:47 srvsvpext mysqld[1551]: or misconfigured. This error can also be caused by malfunctioning hardware.
      Jan 10 16:26:47 srvsvpext mysqld[1551]: To report this bug, see https://mariadb.com/kb/en/reporting-bugs
      Jan 10 16:26:47 srvsvpext mysqld[1551]: We will try our best to scrape up some info that will hopefully help
      Jan 10 16:26:47 srvsvpext mysqld[1551]: diagnose the problem, but since we have already crashed,
      Jan 10 16:26:47 srvsvpext mysqld[1551]: something is definitely wrong and this may fail.
      Jan 10 16:26:47 srvsvpext mysqld[1551]: Server version: 10.1.18-MariaDB-1~xenial
      Jan 10 16:26:47 srvsvpext mysqld[1551]: key_buffer_size=134217728
      Jan 10 16:26:47 srvsvpext mysqld[1551]: read_buffer_size=2097152
      Jan 10 16:26:47 srvsvpext mysqld[1551]: max_used_connections=10
      Jan 10 16:26:47 srvsvpext mysqld[1551]: max_threads=102
      Jan 10 16:26:47 srvsvpext mysqld[1551]: thread_count=3
      Jan 10 16:26:47 srvsvpext mysqld[1551]: It is possible that mysqld could use up to
      Jan 10 16:26:47 srvsvpext mysqld[1551]: key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 1177626 K  bytes of memory
      Jan 10 16:26:47 srvsvpext mysqld[1551]: Hope that's ok; if not, decrease some variables in the equation.
      Jan 10 16:26:47 srvsvpext mysqld[1551]: Thread pointer: 0x0x7f59bea2d008
      Jan 10 16:26:47 srvsvpext mysqld[1551]: Attempting backtrace. You can use the following information to find out
      Jan 10 16:26:47 srvsvpext mysqld[1551]: where mysqld died. If you see no messages after this, something went
      Jan 10 16:26:47 srvsvpext mysqld[1551]: terribly wrong...
      Jan 10 16:26:47 srvsvpext mysqld[1551]: stack_bottom = 0x7f5a221230b8 thread_stack 0x48400
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x55d538fc462e]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(handle_fatal_signal+0x2d5)[0x55d538b133d5]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /lib/x86_64-linux-gnu/libpthread.so.0(+0x113d0)[0x7f5a24c343d0]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7f5a24204418]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7f5a2420601a]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/lib/x86_64-linux-gnu/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x16d)[0x7f5a2493084d]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0x8d6b6)[0x7f5a2492e6b6]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0x8d701)[0x7f5a2492e701]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0x8e23f)[0x7f5a2492f23f]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(_ZN10Item_cache5setupEP3THDP4Item+0x44)[0x55d538b38c74]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(_ZN17Item_in_optimizer8fix_leftEP3THD+0x82)[0x55d538b46972]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(_ZN17Item_in_optimizer10fix_fieldsEP3THDPP4Item+0x3c)[0x55d538b46e4c]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(_ZN9Item_cond10fix_fieldsEP3THDPP4Item+0x109)[0x55d538b43889]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(_ZN9Item_cond10fix_fieldsEP3THDPP4Item+0x109)[0x55d538b43889]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(_Z11setup_condsP3THDP10TABLE_LISTR4ListIS1_EPP4Item+0x18f)[0x55d53894723f]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(_ZN4JOIN7prepareEPPP4ItemP10TABLE_LISTjS1_jP8st_orderbS7_S1_S7_P13st_select_lexP18st_select_lex_unit+0x3e1)[0x55d5389d2151]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(_Z12mysql_selectP3THDPPP4ItemP10TABLE_LISTjR4ListIS1_ES2_jP8st_orderSB_S2_SB_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x8c4)[0x55d5389e0034]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x139)[0x55d5389e0219]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(+0x3ff2a1)[0x55d53897d2a1]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(_Z21mysql_execute_commandP3THD+0x6637)[0x55d53898a3c7]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(_ZN18Prepared_statement7executeEP6Stringb+0x4c5)[0x55d5389a16d5]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(+0x423875)[0x55d5389a1875]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(_Z19mysqld_stmt_executeP3THDPcj+0x169)[0x55d5389a1d69]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1674)[0x55d53898f5c4]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(_Z10do_commandP3THD+0x16d)[0x55d5389909ad]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(_Z24do_handle_one_connectionP3THD+0x182)[0x55d538a59f52]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /usr/sbin/mysqld(handle_one_connection+0x40)[0x55d538a5a110]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /lib/x86_64-linux-gnu/libpthread.so.0(+0x76fa)[0x7f5a24c2a6fa]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f5a242d5b5d]
      Jan 10 16:26:47 srvsvpext mysqld[1551]: Trying to get some variables.
      Jan 10 16:26:47 srvsvpext mysqld[1551]: Some pointers may be invalid and cause the dump to abort.
      Jan 10 16:26:47 srvsvpext mysqld[1551]: Query (0x7f59c0035020): SELECT A.*, B.LLIBEL, B.LIBCLI FROM SVPM01R6 A JOIN SVPC03R2 B ON A.CODCLI=B.CODCLI AND  A.CPRODU=B.CPRODU AND A.CMODUL=B.CMODUL WHERE A.CODCLI='VALNANT' AND (EXISTS(SELECT * FROM SVPC01R1 G WHERE G.CODCLI=A.CODCLI AND G.CDUSER='VALNANT01') OR EXISTS(SELECT * FROM CFGG02P0 H WHERE H.CDUSER='VALNANT01' AND H.CDGROU NOT IN('ADMINT','ANDROS'))) ORDER BY TOUVER DESC LIMIT 200
      Jan 10 16:26:47 srvsvpext mysqld[1551]: Connection ID (thread ID): 959
      Jan 10 16:26:47 srvsvpext mysqld[1551]: Status: NOT_KILLED
      Jan 10 16:26:47 srvsvpext mysqld[1551]: 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=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=off
      Jan 10 16:26:47 srvsvpext mysqld[1551]: The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
      Jan 10 16:26:47 srvsvpext mysqld[1551]: information that should help you find out what is causing the crash.
      Jan 10 16:26:47 srvsvpext systemd[1]: mariadb.service: Main process exited, code=exited, status=1/FAILURE
      Jan 10 16:26:47 srvsvpext systemd[1]: mariadb.service: Unit entered failed state.
      Jan 10 16:26:47 srvsvpext systemd[1]: mariadb.service: Failed with result 'exit-code'.
      

      The request "select A., B................." is one of the main request of my application. It works fine 99,9% times but crashes the server 0,1% times.
      My application works with Apache 8 Java 8 and MariaDB Connector 1.5.2
      My database is about 100 tables, 100000 lines max per table, 200 fields per table.
      I have 2 cores and 5G RAM

        Attachments

        1. mycnf.txt
          6 kB
        2. SVPI01P0_table.txt
          2 kB
        3. vues.txt
          55 kB

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            Assignee:
            elenst Elena Stepanova
            Reporter:
            cmorell Christophe Morell
            Votes:
            1 Vote for this issue
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            4 Start watching this issue

              Dates

              Created:
              Updated:
              Resolved: