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PH00566: Member should fail over after continuous 2 minutes sendHeartBeat failure.

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APAR status

  • Closed as program error.

Error description

  • When member keep failing to sendHeartBeat to Controller
    continuously for 2 minutes, it should fail over.
    A collective member's error handling for
    InstanceNotFoundException preserves the connection and
    allows it to continue heart beating on the assumption that
    it is a temporary situation, such as during controller start
    up. In the field we've seen a case where a controller began
    returning this exception for an extended period. We should
    handle this case on the member side by eventually failing
    the connection so the member can fail over to another

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server Liberty - Systems Management         *
    *                  Functions                                   *
    * PROBLEM DESCRIPTION: Collective member connection remains    *
    *                      open after failures to send heart       *
    *                      beats                                   *
    * RECOMMENDATION:                                              *
    A problem at a collective controller may result in a member
    receiving InstanceNotFoundExceptions when attepting to send
    heart beats to that controller.  In a multicontroller collective
    this exception should cause the controller to fail over to a
    different controller.  Instead, the member continues attempting
    to send heart beats to the same controller.

Problem conclusion

  • When a member fails to send heart beats to a controller for 2
    minutes it will attempt a new connection.
    The fix for this APAR is currently targeted for inclusion in fix
    pack  Please refer to the Recommended Updates page for
    delivery information:

Temporary fix


APAR Information

  • APAR number


  • Reported component name


  • Reported component ID


  • Reported release


  • Status


  • PE




  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date


  • Closed date


  • Last modified date


  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name


  • Fixed component ID


Applicable component levels

Document information

More support for: WebSphere Application Server

Software version: CD0

Reference #: PH00566

Modified date: 02 August 2018

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