IJ45674: GLVM VGS MAY NOT BE SYNCD AT CLUSTER START

APAR status

• Closed as program error.

Error description

• When a PowerHA/GLVM cluster is inactive all
  Remote Physical Volume Client and Server
  devices are in Defined state on all nodes.
  
  When the cluster is started and the first
  node, which joins, acquires a RG with
  GMVG_REP_RESOURCE resources, it starts
  a cl_sync_vgs process after the GLVM
  is varied on, even if a syncvg process
  can't succeed while the RPV server devices
  at the remote node are still in Defined
  state.
  
  Once a remote cluster nodes starts
  and acquires the RG into 'ONLINE SECONDARY'
  state (RPV server devices are made
  Available), the primary node is supposed
  to start another cl_sync_vgs process.
  
  But in large environments it can happen that
  the first cl_sync_vgs process is still running
  (serveral syncvg processes have already failed)
  and so no new cl_sync_vgs process is started:
  +[RG]:glvm_join_cleanup[285] /usr/bin/ps -eo pid,args
  +[RG]:glvm_join_cleanup[285] grep -w cl_sync_vgs
  +[RG]:glvm_join_cleanup[285] grep -vw grep
  +[RG]:glvm_join_cleanup[285] grep -w datavg
  +[RG]:glvm_join_cleanup[285] 1> /dev/null 2>& 1
  +[RG]:glvm_join_cleanup[286] ((0!=0))
  
  
  If that happens LVs of the GLVM VG remain
  unsynchronized (stale).
  

Local fix

• Manually sync stale LVs, if there are any.
  

Problem summary

• In larger environment, on cluster start with GLVM configuration,
   once the primary node is online cl_sync_vgs is triggered
  without checking the RPV servers are in defined state in remote
  nodes leading to cl_sync_vgs failed and LVs remain
  unsynchronized.
  

Problem conclusion

• As fix checking the state of RG in cl_sync_vgs to ACQUIRING
  SECONDARY or ONLINE SECONDARY before proceeding to sync to avoid
   the fail scenario.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IJ44306

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  POWERHA SYSMIR

• Fixed component ID

  5765H3900

Applicable component levels