IZ73969: Applications fail - error MQRCCF_SUBSCRIPTION_IN_USE. Also, MQ V6 broker might fail to start. FDC probes PU294005/PU294010.

WebSphere MQ V6.0 Fix Pack 6.0.2.10
WebSphere MQ V6.0 for iSeries Fix Pack 6.0.2.10
WebSphere MQ 6.0 for HP OpenVMS Alpha and Itanium - Fix Pack 6.0.2.10 (FP03)

APAR status

• Closed as program error.

Error description

• Applications fail during register subscriber operations with
  errors 3155 (MQRCCF_SUBSCRIPTION_IN_USE) and 3156
  (MQRCCF_SUBSCRIPTION_LOCKED). Additional symptoms include
  failures to restart the broker, with accompanying FDCs
  (PU294005 and PU294010). Once the broker fails to restart, no
  publish-subscribe activity is possible. A typical FDC might
  look as follows:
  
  Probe Id :- PU294005
  Component :- fkiRestoreSubscription
  Program Name :- amqfcxba
  Major Errorcode :- frcE_UNEXPECTED_ERROR
  MQM Function Stack
  fpiTaskReply
  faxRunStream
  fkxStartStream
  fkiRestoreRegistrations
  fkiProcessChangeRecord
  fkiReplayRegistrationRecord
  fkiRestoreSubscription
  xcsFFST
  
  Queue manager or broker restart does not resolve this issue.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Any users of WebSphere MQ issuing deregister subscriber commands
  with MQREGO_LEAVE_ONLY specified. An example would be a WAS
  pubsub application.
  
  Platforms affected:
  All Distributed (iSeries, all Unix and Windows)
  ****************************************************************
  PROBLEM SUMMARY:
  The problem was caused by WebSphere MQ writing multiple change
  records to the broker persistent state queue for one
  subscription if a deregister subscriber with MQREGO_LEAVE_ONLY
  was issued. Depending on the subsequent sequence of events,
  this could then lead to applications being returned 3155/3156
  errors during a register subscriber operation. This could also
  lead to failures to restart the broker as a result of duplicate
  subscriptions being present.
  

Problem conclusion

• WebSphere MQ was modified to ensure that multiple change
  records for the same subscription are not persisted to the
  broker state queues.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v6.0
  Platform           Fix Pack 6.0.2.10
  --------           --------------------
  Windows            U200318
  AIX                U832558
  HP-UX (PA-RISC)    U833084
  HP-UX (Itanium)    U833088
  Solaris (SPARC)    U833085
  Solaris (x86-64)   U832557
  iSeries            tbc_p600_0_2_10
  Linux (x86)        U832545
  Linux (x86-64)     U833083
  Linux (zSeries)    U833089
  Linux (Power)      U833087
  Linux (s390x)      U833086
  
  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 LIN X86 V6

• Fixed component ID

  5724H7204

Applicable component levels

• R600 PSY

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