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A fix is available


You can track all active APARs for this component.


APAR status

  • Closed as program error.

Error description

  • Abend5C6-0BAD0002 occurred during a put to topic where we got a
    pageset full condition. The try to put the message to DLQ ends
    because the same page set is used and we recieved again page set
    The problem occurs when CSQIRREQ is invoked to backout as a
    result of the failure during MQPUT to a topic.
    CSQIRREQ is invoked to backout the nested unit of work due to
    the failure, and reads the last log records, 006CE151BF1D.
    This is a compensating log-record, due to a previous CSQIRREQ
    issued by
    CSQIMPU2 when it failed to allocate the necessary pages for the
    message. As a compensating log-record is being processed,
    CSQIRREQ sets
    LRCLRH->LRHLINK to 006CE151BEFB, which comes from LRHUNDO (set
    by CSQIUNDO when performing the backout requested previously by
    CSQJR103 follows the log-records backwards from the current

Local fix

  • n/A

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
    *                 Release 0 Modification 1 and Release 1       *
    *                 Modification 0.                              *
    * PROBLEM DESCRIPTION: The queue manager abends with           *
    *                      5C6-0BAD0002 issued by CSQIRREQ.        *
    *                      If the channel initiator is issuing the *
    *                      put, it will issue abend 5C6-00E7014F.  *
    *                      The abend occurs following an attempt   *
    *                      to put to a topic where the associated  *
    *                      subscriber queues are on a page set     *
    *                      that is almost full.                    *
    * RECOMMENDATION:                                              *
    A message is being put to a topic. When the put to one of the
    subcriber queues fails with return code 2 reason 2192, the put
    is rolled back by invoking CSQIUNDO. The put failed after
    inserting the message body on its page, when requesting a
    spine-page for the queue, there is no more space left. This
    causes the MQPUT to be rolled back, and compensating log
    records are written to the log.
    When the put to the topic is being rolled back as a result of
    this (due to the persistent message delivery being set to all
    (durable) subscribers), CSQIRREQ is invoked, which will roll
    back the unit of work to a save point. The log is read
    backwards using LRHLINK, and when encountering a compensating
    log record from the MQPUT, the LRHUNDO value is copied into the
    LRHLINK value, and the next record is read.
    CSQIUNDO does not store an exact RBA in the LRHUNDO value (it
    stores the RBA of the compensated record minus 1), thus the
    next log read fails unexpectedly, causing the 0BAD0002 abend to
    be issued, which is propagated.

Problem conclusion

  • The code was changed to restore a correct LRHLINK value,
    allowing the roll back of the put to the topic to succeed.

Temporary fix


APAR Information

  • APAR number


  • Reported component name

    WMQ Z/OS V7

  • 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:

    UK94710 UK94711



Fix information

  • Fixed component name

    WMQ Z/OS V7

  • Fixed component ID


Applicable component levels

  • R010 PSY UK94710

       UP13/07/24 P F307

  • R100 PSY UK94711

       UP13/07/24 P F307

Fix is available

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Document Information

Modified date:
02 August 2013