IC74752: INSTALLING WMQ V7.0.1.4 MAINTENANCE CAUSES HA CLUSTER FAILOVER TO FAIL. AN FDC WITH PROBE ID ZT374003 IS GENERATED.

WebSphere MQ V7.0 Fix Pack 7.0.1.6
WebSphere MQ V7.0.1 for i5/OS Fix Pack 7.0.1.6

APAR status

• Closed as program error.

Error description

• After installing WebSphere MQ v7.0.1.4 maintenance (fix pack),
  failing over the queue manager resource in a HA cluster
  environment fails. The queue manager fails to come online
  (start) on the passive node. Instead, a FFST (FDC) with probe
  id ZT374003 for component zutRequestQMFileLocks is generated
  for the MQ execution controller (amqzxma0.exe). The major
  error code reported is lpiRC_Q_MGR_LOCK_UNAVAILABLE with
  comments "Active LockFile and current MQM SID mismatch". The
  FFST function stack is as follows:
  
  MQM Function Stack
  ExecCtrlrMain
  zutRequestQMFileLocks
  xcsFFST
  

Local fix

• Modify the 'active' lock file with the correct SID for the local
  'mqm' group.  The active file is located in the queue managers
  data folder.
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Customers using Microsoft Cluster Server (MSCS) with WebSphere
  MQ V7.0.1.4
  
  Platforms affected:
  Windows
  
  ****************************************************************
  PROBLEM SUMMARY:
  During the queue manager creation, WebSphere MQ stores the
  host name, lock id and the SID of the group 'mqm' in a file
  which resides in the location <drive>:\WebSphere MQ\qmgrs
  \<QMNAME>\active. Under MSCS control this file is  updated
  with the information pertaining to the current node where the
  queue manager is active. The FDC with probe id ZT374003 is
  created if the SID of the mqm group is not same as the SID
  stored in the active lock file. The content of the active file
  is not cleared before the data with the information of the
  active node is written to it.  The length of the data written
  by both the nodes are different, this results in some trailing
  characters in the active file. The comparison fails since the
  length of the SID read from the active file is incorrect.
  

Problem conclusion

• WebSphere MQ is modified so that the data read from the active
  file is correctly interpreted.
  
  | MDVREGR 7.0.1-WS-MQ-Windows-FP0004        |
  | MDVREGR 7.0.1-WS-MQ-Windows-FP0005        |
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v7.0
  Platform           Fix Pack 7.0.1.6
  --------           --------------------
  Windows            U200328
  
  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 WINDOWS V7

• Fixed component ID

  5724H7220

Applicable component levels

• R701 PSY

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