IV22255: WEBSPHERE MQ V7 CREATES PROXY SUBSCRIPTIONS WITH A LEADING '/' IN THE TOPIC STRING.

WebSphere MQ V7.5 Fix Pack 7.5.0.1
WebSphere MQ V7.0 Fix Pack 7.0.1.10
WebSphere MQ V7.0.1 for i5/OS Fix Pack 7.0.1.10
Fix Pack 7.1.0.3 for WebSphere MQ V7.1

APAR status

• Closed as program error.

Error description

• The SYSTEM.BASE.TOPIC topic object is altered to set
  PROXYSUB(FORCE) and to add the topic to a cluster. This causes
  proxy subscriptions to be created on the other queue managers
  in the cluster. Initially the proxy subscriptions are created
  with the correct topic string of '#', but if a queue manager
  with one of the proxy subscriptions is restarted, the topic
  string changes to '/#', for example:
  
  AMQ8096: WebSphere MQ subscription inquired.
  SUBID(414D5120434C555331202020202020200B8AE04F20000C02)
  SUB(SYSTEM.PROXY.CLUS1 CLUSTER /#)      TOPICSTR(/#)
  TOPICOBJ( )
  DEST(SYSTEM.INTER.QMGR.PUBS)
  
  This causes messages not to be published round the cluster as
  expected, because messages published without a leading '/'
  character at the start of the topic string being published to
  don't match the proxy subscription.
  

Local fix

• To get the correct proxy subscriptions recreated after a queue
  manager restart:
  
  1. On each queue manager in the cluster alter the
  SYSTEM.BASE.TOPIC to not be in the cluster (set CLUSTER to '').
  
  2. On each queue manager in the cluster delete all the proxy
  subscriptions for '/#'.
  
  3. On each queue manager in the cluster alter the
  SYSTEM.BASE.TOPIC to be back in the cluster.
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users of clustered publish/subscribe, where SYSTEM.BASE.TOPIC
  is being clustered.
  
  Platforms affected:
  All Distributed (iSeries, all Unix and Windows)
  ****************************************************************
  PROBLEM SUMMARY:
  The code generating the topic string for the proxy subscription
  when the queue manager was restarting was incorrectly adding a
  '/' character for SYSTEM.BASE.TOPIC.
  

Problem conclusion

• The code generating the topic string for the proxy subscription
  when the queue manager is restarting now correctly does not add
  a '/' character when the topic involved is the
  SYSTEM.BASE.TOPIC.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v7.0
  Platform           Fix Pack 7.0.1.10
  --------           --------------------
  Windows            U200352
  AIX                U853055
  HP-UX (PA-RISC)    U853082
  HP-UX (Itanium)    U853087
  Solaris (SPARC)    U853083
  Solaris (x86-64)   U853089
  iSeries            7.0.1.10
  Linux (x86)        U853084
  Linux (x86-64)     U853088
  Linux (zSeries)    U853085
  Linux (Power)      U853086
  
                     v7.1
  Platform           Fix Pack 7.1.0.3
  --------           --------------------
  Windows            7.1.0.3
  AIX                7.1.0.3
  HP-UX (Itanium)    7.1.0.3
  Solaris (SPARC)    7.1.0.3
  Solaris (x86-64)   7.1.0.3
  iSeries            7.1.0.3
  Linux (x86)        7.1.0.3
  Linux (x86-64)     7.1.0.3
  Linux (zSeries)    7.1.0.3
  Linux (Power)      7.1.0.3
  
  Platform           v7.5
  --------           --------------------
  Multiplatforms     7.5.0.1
  
  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:

  PM70900

Fix information

• Fixed component name

  WMQ AIX V7

• Fixed component ID

  5724H7221

Applicable component levels

• R701 PSY

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