C.3.27. WARN [KeepAliveTimerTask] - Error while sending a KEEP_ALIVE query to connection.

Last Updated: 2017-02-15

Condition or Error

Connections to MySQL through the connector report KeepAliveTimerTask errors in the connector.log file


  • Possible causes include local scripts that kill stale connections after some fixed period of time, or the wait_timeout was changed without restarting the connector, or a bug that was fixed in v4.0.3


  • Upgrade to the latest version if you are running a version below 4.0.3

    Check for local scripts that are killing connections

    Restart the Connector

    shell> connector restart