IV71149: INTER-DEPENDENT RESOURCE GROUPS MAY CAUSE CLUSTER MOVE FAILURE

PowerHA-7.1.3 SP4

APAR status

• Closed as program error.

Error description

• When at least three resource groups exist in a cluster, a
  failure may occur during a PowerHA rg_move event.  A
  graphic of an example configuration across a two-node
  cluster follows:
  
  +------------+
  |            |
  |  RG1       | <---------+
  |            | <-+       |
  +------------+   |Start. |
                   |       |
                   |       |
  +------------+   |After. |
  |            | <-+       |Online on the Same Node.
  |  RG2       | <---------+
  |            | <-+       |
  +------------+   |Parent.|
                   |       |
                   |       |
  +------------+   |Child. |
  |            | <-+       |
  |  RG3       | <---------+
  |            |
  +------------+
  

Local fix

• Create a parent/child relationship between the failed RGs
  if workable; otherwise there is no other local fix.
  
  +------------+
  |            | <-------------+
  |  RG1       | <---------+   |Parent. << Add.
  |            | <-+       |   |
  +------------+   |Start. |   |
                   |       |   |
                   |       |   |
                   |       |   |
  +------------+   |After. |   |
  |            | <-+       |Online on the Same Node.
  |  RG2       | <---------+   |
  |            | <-+       |   |
  +------------+   |Parent.|   |
                   |       |   |
                   |       |   |
                   |       |   |
  +------------+   |Child. |   |
  |            | <-+       |   |
  |  RG3       | <---------+   |Child.
  |            | <-------------+
  +------------+
  

Problem summary

• clRGmove command may fail if the RG configured with many
  inter-dependency.  # clRGmove -s false -m -i -g
  RGoya,RGko,RGmago -n v5708 Attempting to move resource group
  RGoya to node v5708.  Attempting to move resource group RGko to
  node v5708.  Attempting to move resource group RGmago to node
  v5708.
  
  Waiting for the cluster to process the resource group movement
  request....
  
  Waiting for the cluster to stabilize........
  
  Resource group movement successful.  Resource group RGoya is
  online on node v5708.
  
  Resource group movement successful.  Resource group RGko is
  online on node v5708.
  
  ERROR: Resource group movement unsuccessful.  Resource group
  RGmago is not online.  To troubleshoot why this occurred,
  please refer to the hacmp.out log file and the documentation
  ERROR: Resource group RGoya,RGko,RGmago is in the ERROR state
  To troubleshoot why the resource group went into this state,
  please refer to the hacmp.out log file and the documentation
  Error Encountered in resource group movement.
  

Problem conclusion

• Corrected event handling code to move RG's to another node
  without any issue.
  

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:

  IV71488 IV72461 IV72607

Fix information

• Fixed component name

  POWERHA SYSMIR

• Fixed component ID

  5765H3900

Applicable component levels