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PI24649: WMQ CSQX504E CSQXRCTL LOCAL PROTOCOL ERROR CHANNEL XXXXX TYPE=00000021 DATA=00000400. INVALID MAXIMUM TRANSMISSION SIZE

A fix is available

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APAR status

  • Closed as program error.

Error description

  • CSQX504E CSQXRCTL Local protocol error, channel xxxxx
    type=00000021 data=00000400
    CSQX599E CSQXRCTL Channel xxxxx ended abnormally
    .
    type=00000021 means 'ERR_MAX_TRANSMISSION_SIZE'.
    data=00000400 is the value of 'MAXTRANSMISSIONSIZE '
    x'400'= 1024.
    .
    Distributed APAR IZ86279.
    .
    Additional information:
    MAXSEG is an attribute for Hitachi TP1 channels
    .
    

Local fix

  • Set MAXSEG to 4000 on the Hitachi TP1 channel definition.
    

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: CSQX504E is produced when starting a    *
    *                      channel. The message has local protocol *
    *                      error type=00000021 and data value less *
    *                      than 4000 (X'FA0'). This occurs when    *
    *                      connecting to a receiver channel which  *
    *                      uses a MAXSEG value less than 4000.     *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The MaxTransmissionSize value is limited to a minimum of 4000,
    values less than this will result in a local protocol error and
    message CSQX504E. In the case where a receiver channel has
    a low MAXSEG value, this will be sent to the sender channel.
    The low value results in the sender channel having the protocol
    error and producing the message.
    

Problem conclusion

  • The policing of the MaxTransmissionSize value has been changed
    to a lower value, 1024, to allow receiver channels on systems
    where MAXSEG is set to a low value.
    010Y
    100Y
    CSQXRMSS
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI24649

  • Reported component name

    WMQ Z/OS V7

  • Reported component ID

    5655R3600

  • Reported release

    010

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2014-08-26

  • Closed date

    2014-09-04

  • Last modified date

    2014-11-04

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

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

    UI21101 UI21102 PH01639 PH01650

Modules/Macros

  • CSQXRMSS
    

Fix information

  • Fixed component name

    WMQ Z/OS V7

  • Fixed component ID

    5655R3600

Applicable component levels

  • R010 PSY UI21101

       UP14/10/02 P F410

  • R100 PSY UI21102

       UP14/10/02 P F410

Fix is available

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Document Information

Modified date:
04 November 2014