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  1. MariaDB Server
  2. MDEV-19742

Signal 11 querying information_schema tables



    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 10.3.15
    • 10.3.16
    • Server
    • None


      I am getting regular signal 11 errors when interacting with INFORMATION_SCHEMA in 10.3.15. Have now crashed using homebrew install on my Mac, docker contianer on my mac, and Centos repo install on AWS (to rule out hardware issue). Once I crashed simply when I issuesd "use information_schema" via mysql command line. More often I crash doing simple selects against the column table.

      Most recent crash on AWS Centos repo install simply involved starting the mariadb service via systemctl, starting mysql command line and then issuing.

      mysql -uroot
      Welcome to the MariaDB monitor.  Commands end with ; or \g.
      Your MariaDB connection id is 8
      Server version: 10.3.15-MariaDB MariaDB Server
      Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
      Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
      MariaDB [(none)]> use information_schema
      Reading table information for completion of table and column names
      You can turn off this feature to get a quicker startup with -A
      Database changed
      MariaDB [information_schema]> select column_name from columns;
      ERROR 2006 (HY000): MySQL server has gone away
      No connection. Trying to reconnect...
      Connection id:    8
      Current database: information_schema
      ERROR 2006 (HY000): MySQL server has gone away
      No connection. Trying to reconnect...
      ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)
      ERROR: Can't connect to the server
      unknown [information_schema]>

      Log output via journalctl is attached and includes at least a couple signal 11s.

      Running on m5.xlarge (4 core 16 GB memory).
      Let me know what other info you would like. Crash has been easy for me to reproduce (3 environments out of 3 so far).


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              anel Anel Husakovic
              TBoyd Thomas Boyd (Inactive)
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