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Thread: Mysql timeout

  1. #1
    Join Date
    Oct 2016

    Default Mysql timeout


    We have to restart every day DB and Pentaho Server in order to work without issues. Issues are related to Scheduler (DB Quartz).

    The error is:

    Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

    The last packet successfully received from the server was 30,572,478 milliseconds ago. The last packet sent successfully to the server was 1 milliseconds ago.

    - Linux
    - Pentaho8 (Server1)
    - MariaDB 10.1.32 (Server2)

    Thanks in advance.

  2. #2
    Join Date
    Apr 2008


    This is a "feature" of MySQL and MariaDB databases.
    If there's no communication on the link for a period of time, it will simply and silently close the connection.

    In a way, it's a good thing if you're going through any routers or firewalls (which is arguably a good and safe thing to do!)

    The recommended solution is to wrap MySQL / MariaDB with C3P0

    Hope that helps!

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