IC89751: WMQ HP NONSTOP V5.3.1 CLUSTER SENDER CHANNEL HAD TO BE RESTARTED MANUALLY AFTER RECYCLING THE CPU.

WebSphere MQ for HP NonStop Server V5.3.1 fix pack 5.3.1.10

APAR status

• Closed as program error.

Error description

• Stopped the CPU. Found the Cluster Sender Channel was stopped
  The event AMQ9604  Cluster Sender Channel stopped unexpectedly
  was reported.  When the qmgr was restarted the channel remained
  in an inactive state. When messages were put via the channel
  the messages remained in the SYSTEM.CLUSTER.REPOSITORY.QUEUE
  The channel had to be manually restarted.
  

Local fix

Problem summary

• If a CLUSSDR or SDR channel is running in an MCA that is in the
  same CPU as the Primary Channel Server,  and that channel has
  been running for at least 5 minutes, and that CPU crashes, the
  channel will not automatically restart. This is a consequence of
  the Takeover logic in the channel server unsetting the InUse
  flag for the channel, because the RETRY flag has not been set.
  This in turn prevents the Channel Retry logic from attempting to
  restart the channel.
  

Problem conclusion

• If the Channel Server is performing a Takeover, the channel
  status should be updated to RETRY and the InUse flag should be
  left as is, therby causing the channel retry logic to be
  executed.
  

Temporary fix

• Start the affected channel manually
  

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