IT25786: IBM MQ Appliance status commands reports status unknown for all queue managers if 6 or more HA/DR queue managers are configured

APAR status

• Closed as program error.

Error description

• The following output is seen for queue managers from the status
  command on the mq appliance command line, even though the queue
  managers are running normally:
  
  QM(QMGRName) Status(Running)
  CPU:                   0.00%
  Memory:                 185MB
  HA role:                 UNKNOWN
  HA status:                UNKNOWN
  HA control:               UNKNOWN
  HA preferred location:          UNKNOWN
  DR role:                 Primary
  
  Alternatively, failure data capture (FDC) records may be
  observed when checking HA/DR status, reporting Probe ID BD045020
  from the function brcStatusQMgrHA.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  This issue affects users of the IBM MQ Appliance who have
  defined multiple HA/DR queue managers.
  
  This has been seen when 6 or more HA/DR queue managers are
  present on the appliance, although may in theory apply to a
  smaller number
  of queue managers if several environment variables are
  configured with long values.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  If several HA/DR queue managers were configured on an MQ
  Appliance, an environment variable used during the invocation of
  internal HA/DR status commands could become set to a larger
  value than was permitted by the lower level firmware.
  
  Exceeding this limit caused multiple failures in the HA/DR
  status commands.
  

Problem conclusion

• The affected HA/DR commands have been modified to avoid the need
  to set large environment variables.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.1 CD    9.1.2
  v9.1 LTS   9.1.0.1
  
  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:

Fix information

• Fixed component name

  IBM MQ APPL M20

• Fixed component ID

  5725Z0900

Applicable component levels

• R910 PSY

     UP