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  1. MariaDB Server
  2. MDEV-18761

galera.galera_var_slave_threads: Test failure: mysql_socket.h:779: mysqld got signal 6

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Cannot Reproduce
    • Affects Version/s: 10.4.3
    • Fix Version/s: N/A
    • Component/s: Galera, Tests
    • Labels:
    • Environment:
      OS: CentOS Linux release 7.6.1810 (Core).

      Description

      MariaDB Server: 10.4.3-MariaDB-debug built from sources, branch=10.4, commit: c568e25379600db8af4bd39df4761ba0fbc1a14e.
      Galera4 lib 26.4.0(r4477): debug built from sources, commit: 9bd47835d0fcdcf2f041da39dbe5b98ff738ff10.

      Run:

      ./mtr --suite galera --force --big-test --max-test-fail=0 --parallel=auto
      

      stdout.log: (attached 190227_stdout_desktop.log)

      galera.galera_var_slave_threads 'innodb' w4 [ fail ]
       
      mysqltest: At line 114: query 'SET GLOBAL wsrep_cluster_address=''' failed: 2013: Lost connection to MySQL server during query
       
      The result from queries just before the failure was:
      < snip >
      SET GLOBAL wsrep_slave_threads = 1;
      connection node_1;
      connection node_2;
      SELECT COUNT(*) FROM t2;
      COUNT(*)
      64
      SELECT COUNT(*) FROM INFORMATION_SCHEMA.PROCESSLIST WHERE USER = 'system user' AND STATE LIKE '%wsrep aborter%';
      COUNT(*)
      1
      SET GLOBAL wsrep_slave_threads = 5;
      SET GLOBAL wsrep_slave_threads = 1;
      connection node_2;
      Shutting down server ...
      connection node_1;
      show status like 'wsrep_cluster_size';
      Variable_name	Value
      wsrep_cluster_size	1
      SET GLOBAL wsrep_slave_threads = 6;
      SET GLOBAL wsrep_slave_threads = 1;
      SET GLOBAL wsrep_cluster_address='';
       
      mysqld: /home/stepan/galera/git/10.4/server/include/mysql/psi/mysql_socket.h:779: inline_mysql_socket_recv: Assertion `mysql_socket.fd != -1' failed.
      190227 13:48:16 [ERROR] mysqld got signal 6 ;
      

      See also attached 190227_galera.galera_var_slave_threads-innodb.zip.

      Note: This test is failed sporadically.

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              Assignee:
              teemu.ollakka Teemu Ollakka
              Reporter:
              stepan.patryshev Stepan Patryshev (Inactive)
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                Dates

                Created:
                Updated:
                Resolved: