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IT09802: IBM MQ 8 JAVA CLIENT FIRST CONNECTION TO IN A JVM TAKES LONGER THAN IT DID AT 7.1.

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • The first connection an IBM MQ Java application makes in a JVM
    takes more than twice as long at IBM MQ 8 as it did in WebSphere
    MQ 7.1.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    All users of IBM MQ v8 Java applications running within short
    lived JVMs.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    Two problems were causing the first time initilisation of the
    Java classes within the JVM to take a great deal longer than
    they did at WebSphere MQ 7.1. The Advanced Message Security
    (AMS) classes were always loaded, even when AMS was functionally
    disabled. The thread name of the Remote Receive Thread was also
    set to a value which included stateful information which was
    complex to calculate. This stateful information added nothing to
    the description as it was only set during thread initilisation.
    

Problem conclusion

  • The code has been modified to avoid loading the AMS libraries
    when AMS is functionally disabled, and to remove the stateful
    information from the Remote Receive Thread thread name. These
    changes bring the first time initilisation of the Java classes
    within the JVM to a value much closer to that in WebSphere MQ
    7.1.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v8.0       8.0.0.4
    
    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

    IT09802

  • Reported component name

    WMQ BASE MULTIP

  • Reported component ID

    5724H7251

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-07-06

  • Closed date

    2015-08-25

  • Last modified date

    2015-08-25

  • 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

  • R800 PSY

       UP

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Document Information

Modified date:
25 August 2015