IT28185: Crashed cluster sender channel is never restarted by repository manager

APAR status

• Closed as program error.

Error description

• Under certain conditions if a cluster sender channel process
  terminates unexpectedly, the cluster repository manager cache
  may not get informed of the state change. If the channel status
  table and cluster cache information remain out of sync, it may
  lead to incorrect product behaviour based on the repository
  manager believing that the channel is running.
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Customers using clustering that encounter an unexpected channel
  process termination are potentially affected.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  The repository manager maintains a cache of channel status
  information for cluster channels, the cache is normally updated
  when the channel status table is updated. Under certain
  circumstances, following an unexpected channel termination, the
  cached copy of this data may become out of sync with the status
  table. The stale cache data may lead to incorrect product
  behaviour in cluster related operations.
  

Problem conclusion

• The logic was corrected to ensure that the cluster cache would
  be updated in step with the channel status table after handling
  abnormal termination of a channel MCA.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v8.0       8.0.0.13
  v9.0 LTS   9.0.0.8
  v9.1 CD    9.1.3
  v9.1 LTS   9.1.0.3
  
  The latest available maintenance can be obtained from
  'WebSphere MQ Recommended Fixes'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
  
  If the maintenance level is not yet available information on
  its planned availability can be found in 'WebSphere MQ
  Planned Maintenance Release Dates'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
  ---------------------------------------------------------------
  

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:

  PH13072

Fix information

• Fixed component name

  IBM MQ BASE MP

• Fixed component ID

  5724H7251

Applicable component levels