IT34685: The dltmqm command may fail if run on multiple RDQM nodes concurrently

APAR status

• Closed as program error.

Error description

• Running dltmqm on multiple replicated data queue manager (RDQM)
  nodes concurrently returns:
  
  IBM MQ queue manager running on node '[hostname]'.
  

Local fix

• Avoid issuing dltmqm for the same RDQM on multiple nodes
  concurrently
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users running MQ in an RDQM configuration
  
  
  Platforms affected:
  Linux on x86-64
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  A timing window existed whereby the dltmqm could enter an
  invalid lock state if it was executed for the same RDQM on
  multiple nodes concurrently, preventing the command from
  obtaining the necessary resources to delete the queue manager
  successfully.
  

Problem conclusion

• The dltmqm RDQM logic has been updated to address this timing
  window.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.1 LTS   9.1.0.8
  v9.x CD    9.2.2
  
  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

  IBM MQ BASE MP

• Fixed component ID

  5724H7271

Applicable component levels