IT25671: CODE CHANGE FOR RECORDED OBJECT REFRESH METADATA USED IN MASTER TO SLAVES SYNCHRONIZATION.

WebSphere MQ for HP NonStop Server V5.3.1 fix pack 5.3.1.15
WebSphere MQ for HP NonStop Server V5.3.1 fix pack 5.3.1.16

APAR status

• Closed as program error.

Error description

• Errors AMQ9511 and AMQ9448 are logged along with FFST
  regarding ProbeID: RM220005 and Probe Type: MSGAMQ9511
  given by one or more slave repmans due to inconsistencies
  between CPUs regarding subscriptions in number and
  referenced object as well as expiration time.
  When multiple slaves are affected, in consequence the
  problem described in IT24388 may occur.
  This is a generic description of a multi root cause error
  scenario, please also check APARs about other problems
  identified: IT25665, IT25666, IT25669, IT25671.
  
  This APAR is about problems in maintenance to consistently
  identify objects held in use by the queue manger, which
  need to be refreshed to prevent expiry of their subscriptions.
  

Local fix

• N/A
  

Problem summary

• The information if an object is in use or not is kept in
  shared memory, due to this, this information differs for
  each CPU. This breaks master to slaves synchronization of
  refresh operations for objects held in use by the queue manager.
  

Problem conclusion

• Code was changed to record information if an object was
  refreshed by the master in metadata provided along with
  the processed request to the slaves and to rely in slaves
  on this recorded information to determine if an object needs
  to be refreshed or not instead of local shared memory state.
  

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

  WEBS MQ NSS ITA

• Fixed component ID

  5724A3902

Applicable component levels

• R531 PSY

     UP