IZ44450: BROKER FAILS TO LOAD ONE SUBSCRIPTIONS FOR EACH BATCH OF 2500 SUBSCRIPTIONS

WebSphere Message Broker V6.1 - Fix Pack 6.1.0.7

APAR status

• Closed as program error.

Error description

• During PubSub subscription loading, the master EG will process
  all of the subscriptions and pass that data onto the other eg in
  the broker. This is done in a batch. The problem here is that
  for every 2500 subscriptions loaded, one is left behind, and
  thus the subscriber will not receive the requested message.
  

Local fix

• None
  
  ONe possibility, would be to avoid more than 2500 registered
  subscribers.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere Message Broker        *
  *                 publish and subscribe.                       *
  ****************************************************************
  * PROBLEM DESCRIPTION: The broker fails to publish to a        *
  *                      subscription even though it is          *
  *                      stored in the broker database.          *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  On startup or a restart, the execution group will load the
  subscriptions from the broker database in batches of 2500
  records.  The problem was that the last record in each
  complete batch was not correctly stored causing publications
  to miss that particular subscription.
  

Problem conclusion

• The WebSphere Message Broker code was changed to correct the
  batch loading.
  This only applies to the last recond of each batch.
  A user must have more than 2500 subscriptions
  before this will become a problem.
  If the last batch was less than 2500 subscriptions
  then all the records of that batch woould be loaded.
  For example, if you have 5100 subscriptions then two
  of them will be missing.
  The actual subscription missing is difficult to predict
  since subscriptions can be added/removed.
  

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

  WMB SOL SPARC

• Fixed component ID

  5724J0502

Applicable component levels

• R100 PSY

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