JR48550: DURABLE MESSAGES CAN BE DELIVERED TO MESSAGE EVENT MORE THAN ONCE

Version 7.5.1 Fix Pack 2 for the IBM Business Process Manager products
Version 8.5 Refresh Pack 5 for the IBM Business Process Manager products
Download Version 8.0.1 Fix Pack 3 for the IBM Business Process Manager products
Version 8.5.0 Fix Pack 2 for the IBM Business Process Manager products

APAR status

• Closed as program error.

Error description

• If a BPD contains an attached intermediate message event with
  the 'Repeatable' flag and the 'Durable Subscription' flag and
  the 'Consume Message' flag checked, and multiple messages are
  sent to this BPD in a short time, then some of these message can
  be delivered multiple times.
  

Local fix

Problem summary

• Durable messages can be delivered to message event more than
  once
  
  PROBLEM DETAILED DESCRIPTION:
  If multiple durable messages arrive in a short time for an
  attached message event with the 'interrupt activity' flag
  unchecked, the 'repeatable' flag checked and the 'consume
  message' flag checked, it can happen that some of these
  messages are delivered multiple times.
  The reason is that handling of durable messages is difficult,
  since events that are activated check whether there is a
  durable message that they could consume and on the other hand,
  messages arriving check whether there is a waiting message
  event to which they could be delivered. To find out, whether a
  durable message has already been delivered to a BPD instance,
  the <is-message-consumed-query> checks the database. This query
  did not catch all cases in which a durable message event was
  already delivered to a BPD instance. Especially, if a message
  event waits with a wait id, but the durable message was
  delivered to a different wait id of the same message event in
  the BPD instance, the query did not discover that the message
  was already delivered.
  

Problem conclusion

• Fix the <is-message-consumed-query>. Now the query discovers
  that the message is already delivered to a BPD instance, even
  if it was delivered to a different wait id.
  
  FIX AVAILABILITY:
  iFix for 8.0.1.2 is/will be available on Fix Central; search for
  APAR JR48550 at http://www.ibm.com/support/fixcentral/
  iFix for 8.5.0.1 is/will be available on Fix Central; search for
  APAR JR48550 at http://www.ibm.com/support/fixcentral/
  Fix is also targetted for inclusion in next fixpack for
  BPM V7.5.1, BPM 8.0.1
  
  When obtaining any of the above fixes, be sure to download the
  accompanying readme, for itself, and any prerequisite fixes, and
  review them thorougly.
  

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

  BPM STANDARD

• Fixed component ID

  5725C9500

Applicable component levels

• R801 PSY

     UP

• R850 PSY

     UP