IJ23054: 'MMCHNODE --QUORUM' FAILS WITH CCR ERROR 809

APAR status

• Closed as program error.

Error description

• When quorum nodes get removed from
  the cluster by using 'mmdelnode' and added
  back later for use as quorum nodes,
  the first attempt of 'mmchnode' (to declare those
  nodes as quorum nodes) might fail.
  This is caused by a CCR bug, which uses old
  cached outgoing connections not closed
  and delected, when those nodes have been
  removed from the cluster (during 'mmdelnode').
  

Local fix

• Attempt the same 'mmchnode' command again,
  and it should succeed.
  

Problem summary

• When quorum nodes get removed from
  the cluster by using 'mmdelnode' and added
  back later for use as quorum nodes,
  the first attempt of 'mmchnode' (to declare those
  nodes as quorum nodes) might fail.
  This is caused by a CCR bug, which uses old
  cached outgoing connections not closed
  and delected, when those nodes have been
  removed from the cluster (during 'mmdelnode').
  

Problem conclusion

• Benefits of the solution:
  
  'mmchnode' succeeds during the first
  attempt under described circumstances.
  
  Work around:
  
  Attempt the same 'mmchnode' command again,
  and it should succeed.
  
  Problem trigger:
  
  Executing 'mmchnode' to declare non-quorum nodes
  as quorum nodes, after those (other quorum nodes)
  nodes have been removed from the
  cluster shortly prior,  and the cluster has
  just one quorum node.
  (at the time the new quorum node is being declared)
  
  Symptom:
  
  Unexpected Results/Behavior
  
  Platforms affected:
  
  ALL Operating System environments
  
  Functional Area affected:
  
  -CCR
  
  -Admin Commands (mmchnode)
  
  Customer Impact:
  
  Suggested
  

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

  GPFS NR POWER E

• Fixed component ID

  5725Q01NP

Applicable component levels