IBM Support

IT33490: Triggered channels slow to start and messages build up on SYSTEM.CHANNEL.INITQ

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APAR status

  • Closed as program error.

Error description

  • In a queue manager configured with Adopt MCA and channel
    triggering
    the channels are slow to start. Additionally the
    SYSTEM.CHANNEL.INITQ
    queue depth increases and takes a long period of time to
    decrease.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users using several SDR channels and the Adopt MCA feature
    likely to be affected this problem.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    A defect in MQ channel status table lock management when
    adopting a channel caused the messages to be processed slowly
    resulting in slow channel startup and high queue depth in
    SYSTEM.CHANNEL.INITQ.
    

Problem conclusion

  • MQ code has been modified to resolve problem in MQ channel
    status table lock management.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v9.1 LTS   9.1.0.7
    v9.2 LTS   9.2.0.1
    
    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

    IT33490

  • Reported component name

    IBM MQ BASE MP

  • Reported component ID

    5724H7271

  • Reported release

    910

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2020-07-09

  • Closed date

    2020-09-17

  • Last modified date

    2020-10-19

  • 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

    IBM MQ BASE MP

  • Fixed component ID

    5724H7271

Applicable component levels

[{"Line of Business":{"code":"LOB36","label":"IBM Automation"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"910"}]

Document Information

Modified date:
20 October 2020