PK83435: IMPROVEMENTS TO SERVICE INTEGRATION BUS BEHAVIOR IN RECOVERY SCENARIOS WITHIN COMPLEX TOPOLOGIES

Fixes are available

APAR status

Closed as program error.

Error description

Additional testing has been performed to validate the behaviour
of the default messaging provider for WebSphere Application
Sever under certain recovery scenarios in complex topologies.

As a result of this testing some improvements in the behaviour
of the default messaging provider have been implemented, and
this APAR includes those improvements in WebSphere
Application Server

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  Users of the default messaging provider     *
*                  for IBM WebSphere Application Server        *
*                  Version 6.0, Version 6.1 or Version 7.0     *
****************************************************************
* PROBLEM DESCRIPTION: The issues described in this APAR       *
*                      can occur during recovery from a        *
*                      failure or restart of a component of    *
*                      the system, such as an application      *
*                      server or network.                      *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The following issues are resolved by this APAR:
- When consuming from a queue point or durable
  subscription via an intermediate messaging engine (ME),
  message consumption might not resume after the
  server hosting the ME the application is connected to is
  restarted. The JVM logs of the server hosting the
  intermediate ME contain the following entry repeatedly:
  CWSIP0512E: A stream to communicate with the localisation
  messaging engine {1} for destination {0} is not available.
- Clicking "Delete all messages" to delete all messages on a
  remote queue point might result in a deadlock within the
  ME, if an asynchronous task happens to be active within the
  ME moving messages from that remote queue point to another
  due to availability of remote MEs. A javacore shows threads
  in the following methods:
  com.ibm.ws.sib.processor.utils.LockManager.lockExclusive
  com.ibm.ws.sib.processor.impl.PtoPOutputHandler.reallocateMsgs
- Clicking "Cancel message request" on a message request
  viewed on a known remote queue point in the administrative
  console might not correctly remove the message request.
- Where an ME has a connected consumer that is consuming
  messages from a remote queue point a pair of CWSIP0553W
  and CWSIP0554W messages might be output to the log for each
  message that has been consumed. The messages can be ignored.
- After enabling the sib.processor.repeatedMessagePercentage
  custom property described in PK65439, the CWSIP0795W
  messages output contain "0 percent", rather than the correct
  value.
- When an application server hosting an ME restarts after
  terminating abruptly, and that ME was performing messaging
  with ReliablePerisistent messages at the time it failed,
  transactions may be incorrectly listed as indoubt using the
  script supplied in the "Resolving indoubt transactions"
  section of the information center.

Problem conclusion

The fix for this APAR is currently targeted for inclusion in
fix pack 6.0.2.35, 6.1.0.25 and 7.0.0.5.  Please refer to the
Recommended Updates page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PK83435
Reported component name
PLAT MSG COM
Reported component ID
620400101
Reported release
100
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2009-03-26
Closed date
2009-05-01
Last modified date
2009-05-01

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
PLAT MSG COM
Fixed component ID
620400101

Applicable component levels

R100 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
29 December 2021

Tips

PK83435: IMPROVEMENTS TO SERVICE INTEGRATION BUS BEHAVIOR IN RECOVERY SCENARIOS WITHIN COMPLEX TOPOLOGIES

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

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

Fixed component ID

Applicable component levels

R100 PSY

Document Information

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