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PM77160: WMQ Z/OS V710: ABN=0C4-00000011 IN CMQXRSTF+04928 13/03/15 PTF PECHANGE

A fix is available

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APAR status

  • Closed as program error.

Error description

  • The 0C4 is occuring when a message with an RFH2
    is put onto a shared queue with CFLEVEL 5 and
    OFFLOAD(SMDS).
    If the length of the message not including the RFH2
    is less than the length of the supplied buffer
    specified on the MQGET, but the length of the message
    including the RFH2 is greater than the
    length of the supplied buffer, then the MQGET will
    return with MQCC/MQRC 0 rather than MQCC
    and MQRC 2080, MQRC_TRUNCATED_MSG_FAILED.
    .
    Additional keywords:
    MQSMDS/K
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
    *                 Release 1 Modification 0 using SMDS messages *
    ****************************************************************
    * PROBLEM DESCRIPTION: An MQGET on a shared SMDS queue can     *
    *                      succeed if the length of the message    *
    *                      plus its header exceeds the length of   *
    *                      the getter's buffer.  It should have    *
    *                      failed with MQRC_TRUNCATED_MSG_FAILED   *
    *                      if MQGMO_ACCEPT_TRUNCATED_MSG is not    *
    *                      specified.  An FFST may be produced by  *
    *                      rstSendAsyncMessage when client code    *
    *                      detects the length error.  An 0C4 PIC   *
    *                      11 in rstSendAsyncMessage in CMQXRSTF   *
    *                      may also be encountered.                *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    This APAR addresses the SMDS case for APAR PM67738.
    
    The problem occurs when a message with subsequent headers
    following the MQMD is put onto a shared queue with CFLEVEL 5 and
    OFFLOAD(SMDS).  For example, for a message with an MQRFH2, if
    the length of the data following the RFH2 is less than the
    length of the supplied buffer specified on the MQGET, but the
    length of the RFH2 plus the following data is greater than the
    length of the supplied buffer, then the MQGET will return with
    MQCC 0 rather than MQCC 1 and MQRC 2080,
    MQRC_TRUNCATED_MSG_FAILED.
    
    CSQIMGES doesn't detect that the message length plus the header
    exceeds the getter's buffer, and as a result fails to issue a
    MQRC_TRUNCATED_MSG_FAILED.
    
    This APAR also fixes an additional problem that can be
    encountered after the fix for PM67738.
    
    When getting a message from a shared queue and
    MQGMO_PROPERTIES_IN_HANDLE or MQGMO_NO_PROPERTIES is specified
    (or the associated setting in PROPCTL is present), and the
    message is stored in a CFLEVEL 4 (non-SMDS) CFSTRUCT with an
    RFH2, CSQIMGES will return CSQI_TEXT_BUFFER_TOO_SMALL.
    
    This is because that, in this case, the calculation of the
    message length, before comparing with the amount of message data
    moved into the caller's buffer, the RFH2 is counted twice in
    error.
    

Problem conclusion

  • CSQIMGES has been changed to correctly calculate the message
    length when comparing data actually moved into the caller's
    buffer.
    100Y
    CSQIMGES
    

Temporary fix

  • *********
    * HIPER *
    *********
    

Comments

APAR Information

  • APAR number

    PM77160

  • Reported component name

    WMQ Z/OS V7

  • Reported component ID

    5655R3600

  • Reported release

    100

  • Status

    CLOSED PER

  • PE

    YesPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2012-11-15

  • Closed date

    2013-04-15

  • Last modified date

    2013-06-04

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

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

    UK93446

Modules/Macros

  • CSQIMGES
    

Fix information

  • Fixed component name

    WMQ Z/OS V7

  • Fixed component ID

    5655R3600

Applicable component levels

  • R100 PSY UK93446

       UP13/05/08 P F305 «

Fix is available

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Document Information

Modified date:
04 June 2013