IT13869: MQ APPLIANCE: UNABLE TO CREATE 16TH HA QMGR, ALTHOUGH DOCUMENTATION STATES THAT 16 ARE ALLOWED IN A HA GROUP

APAR status

• Closed as program error.

Error description

• Depending on the length of queue manager names being used,
  creation of high availability (HA) queue managers can fail.
  The output from the crtmqm command indicates that "Setup
  completed", but subsequently begins the removal of the HA
  configuration.
  The following line is seen by the user:
  
  	Removing high availability configuration on this appliance.
  

Local fix

• Do not exceed 12 queue managers for the high availability
  configuration
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  User of the IBM MQ Appliance M2000 that are creating multiple
  high availability queue managers on a single pair of appliances
  in a High Availability Group
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  The problem was caused by the size of the configuration data
  that was produced for high availability queue managers.
  Depending on the length of the queue manager names in use,
  internal processing could fail.
  This introduced a restriction as to the number of queue managers
  that could be created (crtmqm) and manipulated by other commands
  

Problem conclusion

• The IBM MQ Appliance firmware has been changed so that the size
  of the configuration data is no longer an issue
  There are still limitations on the actual number of queue
  managers that can be created based on the individual queue
  manager file system sizes used.
  
  Users should be aware that once the solution is applied, no
  attempt should be made to perform an 'upgrade' to an earlier
  maintenance level.
  As documented in the Knowledge Center, it is not possible to
  perform a firmware switch on an appliance in a High Availability
  group.
  See
  http://www.ibm.com/support/knowledgecenter/SS5K6E_1.0.0/com.ibm.
  mqa.doc/upgrading/up00004_.htm)
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v8.0       8.0.0.5
  
  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 APPL M20

• Fixed component ID

  5725S1400

Applicable component levels

• R800 PSY

     UP