IT42246: IBM MQ RDQM queue manager might fail to switch to its configuredpreferred node.

APAR status

• Closed as program error.

Error description

• An IBM MQ replicated data queue manager (RDQM) may not switch to
  or start on the designated primary node in an RDQM pacemaker
  cluster. The configuration information used to make a queue
  manager primary on the desired node may be missing. The logs
  show that the node is missing transient attributes
  
  <node_state id="2" uname="machine_2" in_ccm="true" crmd="online"
  crm-debug-origin="do_update_resource" join="member"
  expected="member">
      *** MISSING - NO TRANSIENT ATTRIBUTES AT ALL ***
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users of the IBM MQ RDQM feature who have set a preferred HA
  node.
  
  
  Platforms affected:
  Linux on x86-64
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  As a result of a brief temporary loss of connectivity to other
  RDQM nodes, the values of certain internal transient metadata
  attributes became out of sync with the other nodes. The loss of
  synchronization meant that the node was ineligible to run the
  active instance of the queue manager. This APAR extends the
  behaviour of  IT33117 which handles newly created HA groups and
  not existing HA groups.
  

Problem conclusion

• The code has been updated to apply the IT33117 code changes to
  the equivalent logic handling existing HA groups.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.2 LTS   9.2.0.20
  v9.x CD    9.2.4
  
  The latest available maintenance can be obtained from
  'IBM MQ Recommended Fixes'
  https://www.ibm.com/support/pages/recommended-fixes-ibm-mq
  
  If the maintenance level is not yet available information on
  its planned availability can be found in 'IBM MQ
  Planned Maintenance Release Dates'
  https://www.ibm.com/support/pages/ibm-mq-planned-maintenance-rel
  
  ---------------------------------------------------------------
  

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

  MQ BASE V9.2

• Fixed component ID

  5724H7281

Applicable component levels