IT45226: MQ Appliance : HA control of a HA queue manager is in disabled state when it should be in enabled state

APAR status

• Closed as program error.

Error description

• In the MQ Appliance, if there are multiple Queue Managers
  sharing a common suffix in their names and
  one of them transitions to an "ended" state, it affects other
  QMgrs with a similar suffix.
  Specifically, the HA control is disabled.
  
  Steps to recreate:
   1) crtmqm -sx AAATEST
   2) crtmqm -sx ATEST
   3) endmqm -w AAATEST
   4) status -l
  
  The result reported status is:
  
    QM(AAATEST)                              Status(Ended
  unexpectedly)
    Queue manager file system:               0.2GB total, 50MB
  used [42%]
    HA role:                                 Primary
    HA status:                               Normal
    HA control:                              Disabled
    HA preferred location:                   This appliance
    HA blocked location:                     None
  
    QM(ATEST)                                Status(Running)
    CPU:                                     1.91%
    Memory:                                  189MB
    Queue manager file system:               0.2GB total, 50MB
  used [42%]
    HA role:                                 Primary
    HA status:                               Normal
    HA control:                              Disabled
    HA preferred location:                   This appliance
    HA blocked location:                     None
  

Local fix

• Start the queue manager that has the same suffix as the one
  showing HA control as disabled.
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  MQ appliance users using High Availability queue managers with
  same suffix in the queue manager names
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  When a queue manager is stopped, a defect in the logic used to
  filter the QM names caused the HA control of a different QM with
  same suffix as the queue manager that was stopped, to go into
  disabled state.
  

Problem conclusion

• MQ code has been modified to resolve the issue that disables the
  HA control of  the queue manager.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.x CD    9.3.5
  
  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://ibm.biz/mqplannedmaintenance
  
  ---------------------------------------------------------------
  

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 APPLIANCE M2

• Fixed component ID

  5900ALJ00

Applicable component levels