IBM Support

IT22258: MQ generates unnecessary FDCs with probe IDs ZS402095 and RM575000 if an API exit changes the message length

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APAR status

  • Closed as program error.

Error description

  • If an MQ API exit changes the message length the queue manager
    may generate unnecessary FDCs with Probe Ids ZS402095 and
    RM575000.
    
    Probe Id          :- ZS402095
    Component         :- zstAsyncConsume
    Thread            :- 5    AsyncConsume
    Arith1            :- 6 (0x6)
    Arith2            :- 5 (0x5)
    Comment1          :- Message length error
    
    MQM Function Stack
    zstAsyncConsumeThread
    zstAsyncConsume
    xcsFFST
    
    MQM Trace History
    ...
    ---} ziiMQGETM rc=OK
    --} zstMQGETM rc=OK
    ...
    ---{ APIExit
    ---} APIExit rc=OK
    --} zutCallApiExitsDataConvGet rc=OK
    --{ vpiConvertData
    ---{ xcsIsEnvironment
    ---} xcsIsEnvironment rc=OK
    --} vpiConvertData rc=OK
    --{ xcsFFST
    
    Probe Id          :- RM575000
    Component         :- rstSendAsyncMessage
    Thread            :- 5    AsyncConsume
    Arith1            :- 5 (0x5)
    Arith2            :- 6 (0x6)
    Comment1          :- Message length error
    
    MQM Function Stack
    zstAsyncConsumeThread
    zstAsyncConsume
    zstUserCallback
    zstConsumerFunction
    rstConsumer
    rstSendAsyncMessage
    xcsFFST
    
    MQM Trace History
    ...
    ----{ rstConsumer
    -----{ rstSendAsyncMessage
    ------{ xcsFFST
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users using async consume with an API exit (data conversion
    exit).
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    This problem occurred because the message length in an internal
    data structure was not updated correctly by the queue manager
    after invoking API exits, which caused an error during
    subsequent message length validation.
    

Problem conclusion

  • The MQ queue manager logic has been modified to correctly update
    the message length in this internal structure after calling API
    exits.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v7.5       7.5.0.9
    v8.0       8.0.0.10
    v9.0 LTS   9.0.0.4
    
    The latest available maintenance can be obtained from
    'WebSphere MQ Recommended Fixes'
    http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
    
    If the maintenance level is not yet available information on
    its planned availability can be found in 'WebSphere MQ
    Planned Maintenance Release Dates'
    http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
    ---------------------------------------------------------------
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT22258

  • Reported component name

    WMQ BASE MULTIP

  • Reported component ID

    5724H7251

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-09-04

  • Closed date

    2018-04-19

  • Last modified date

    2018-04-19

  • 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

    WMQ BASE MULTIP

  • Fixed component ID

    5724H7251

Applicable component levels

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0.0.0","Edition":"","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
19 April 2018