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

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 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