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IT18769: A DELAY IS OBSERVED IN DELIVERING MESSAGES TO A REMOTE QUEUE MANAGER AFTER MESSAGE REROUTING ON HP NSS QUEUE MANAGER.

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APAR status

  • Closed as program error.

Error description

  • A delay is observed in delivering messages to a remote queue
    manager after message rerouting on HP NSS queue manager.
    The order of events would be similar to the following:
    19:21:04   CLUSRCVR on AIX#1 was stopped
    19:21:20   Qmgr on AIX #1 stopped
    19:21:54   CLUSSDR on NonStop Qmgr detected channel down.
    19:22:54   AMQ9002 Channel TO.X is starting
    19:23:14   AMQ9202 Remote host not available
                     (It took 20 seconds)
                     (No message was PUT during this period.)
    19:23:14   AMQ9999 Channel program ended abnormally.
    19:24:14   AMQ9002 Channel TO.X is starting
    19:24:15   A message was PUT from NonStop
    19:24:22   Appl on AIX#4 received the message.
                     (It took 7 seconds)
    19:24:34   AMQ9202 Remote host not available.
    19:24:34   AMQ9999 Channel program ended abnormally.
    

Local fix

Problem summary

  • gethostbyname() was not called in a thread aware manner. This
    resulted in MCAs being blocked whenever a dns lookup took place
    and which may have caused delays if the name resolution did not
    return immediately.
    

Problem conclusion

  • The WebSphere MQ product code has been changed to solve the name
    resolution in a more thread friendly manner.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT18769

  • Reported component name

    WEBS MQ NSS ITA

  • Reported component ID

    5724A3902

  • Reported release

    531

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-01-11

  • Closed date

    2017-02-02

  • Last modified date

    2017-02-02

  • 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

    WEBS MQ NSS ITA

  • Fixed component ID

    5724A3902

Applicable component levels

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSCPQ5M","label":"APAR"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"5.3.1","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
02 February 2017