IV10230: WebSphere MQ V7 CLIENT CHANNELS FAIL TO END COMPLETELY FOLLOWING BROKEN CONNECTION TO THE QUEUE MANAGER.

WebSphere MQ V7.0 Fix Pack 7.0.1.8
WebSphere MQ V7.0.1 for i5/OS Fix Pack 7.0.1.8
Fix Pack 7.1.0.1 for WebSphere MQ V7.1
WebSphere MQ V7.1 for i5/OS Fix Pack 7.1.0.1
WebSphere MQ v7.0.1.8 Hypervisor for AIX
WebSphere MQ v7.0.1.8 Hypervisor for RHEL

APAR status

• Closed as program error.

Error description

• The DISPLAY CHANNEL STATUS command showed a number of channels
  as RUNNING for client applications which had disconnected due to
  an earlier error. The DISPLAY CONN command shows no connection
  for the channel.
  

Local fix

• Restart the qmgr to clear the orphaned channels.
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Queue Managers which host connections from v7 client
  applications which are using SHARECNV > 0.
  
  Platforms affected:
  All Distributed (iSeries, all Unix and Windows)
  ****************************************************************
  PROBLEM SUMMARY:
  A timing condition in the SVRCONN thread in the amqrmppa
  process exists where the 2 threads responsible for the
  connection, are attempting to respond to a
  MQRC_CONNECTION_BROKEN reason code from the queue manager. The
  final stages of the client channel shutdown is that the primary
  thread must wait for secondary thread to complete, however the
  secondary thread is sometimes able to end without the primary
  thread being notified. The primary thread then waits
  indefinitely leaving the CHANNEL STATUS display showing a
  running channel for a client application which has disconnected.
  

Problem conclusion

• When the async-consume is ending due to a CONNECTION_BROKEN
  reason code returned by the queue manager it ensures that the
  main channel thread is notified that it has ended.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v7.0
  Platform           Fix Pack 7.0.1.8
  --------           --------------------
  Windows            U200335
  AIX                U845856
  HP-UX (PA-RISC)    U847965
  HP-UX (Itanium)    U847970
  Solaris (SPARC)    U847966
  Solaris (x86-64)   U847972
  iSeries            7.0.1.8
  Linux (x86)        U847967
  Linux (x86-64)     U847971
  Linux (zSeries)    U847968
  Linux (Power)      U847969
  
                     v7.1
  Platform           Fix Pack 7.1.0.1
  --------           --------------------
  Windows            7.1.0.1
  AIX                7.1.0.1
  HP-UX (PA-RISC)    7.1.0.1
  HP-UX (Itanium)    7.1.0.1
  Solaris (SPARC)    7.1.0.1
  Solaris (x86-64)   7.1.0.1
  iSeries            7.1.0.1
  Linux (x86)        7.1.0.1
  Linux (x86-64)     7.1.0.1
  Linux (zSeries)    7.1.0.1
  Linux (Power)      7.1.0.1
  
  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:

Fix information

• Fixed component name

  WMQ AIX V7

• Fixed component ID

  5724H7221

Applicable component levels

• R700 PSY

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