IBM Support

PI88958: All channel processing hangs some weeks after user deletes cluster transmission queue

A fix is available


You can track all active APARs for this component.


APAR status

  • Closed as program error.

Error description

  • Due to a missing cluster transmission queue, the MQ cluster
    repository process abends.

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of IBM MQ for z/OS Version 8       *
    *                 Release 0 Modification 0.                    *
    * PROBLEM DESCRIPTION: If the associated cluster transmission  *
    *                      queue to an expired channel has been    *
    *                      deleted by the user then a S378 abend   *
    *                      in the Channel Initiator can be issued  *
    *                      during cluster maintenance.             *
    The user deleted a locally defined queue that was previously
    associated as the transmission queue for a local cluster sender
    channel. When that channel was not used for a long time (over 90
    days) then, via internal automated processing in the queue
    manager's cluster repository manager, the local auto-defined
    channel definitions for it were expired from the local cluster
    cache. At this time the queue manager was calling MQOPEN on the
    cluster transmission queue that was configured for that channel.
    If the user had deleted the queue, then this failed, and in the
    error-handling logic that follows, the CHINIT can issue a S378

Problem conclusion

  • The MQ product code has been altered so that the missing
    transmission queue is not treated as an error condition at this
    point in the processing.  The cluster repository manager
    completes its removal of the old records from its cache without
    any errors.

Temporary fix


APAR Information

  • APAR number


  • Reported component name

    IBM MQ Z/OS V8

  • 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:

    PH26671 UI70283



Fix information

  • Fixed component name

    IBM MQ Z/OS V8

  • Fixed component ID


Applicable component levels

  • R000 PSY UI70283

       UP20/08/11 P F008 ¢

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
03 September 2020