Wednesday, 11 April 2018

NetApp Cluster HA is not working correctly | ALERT rdb.ha.mboxError: Bidirectional failover under the 'cluster HA' configuration is not currently functional due to problem with the on-disk mailboxes.

On one my NetApp 8.3 cluster, the following errors were seen. Here are the steps that were taken to resolve the issue.

From Event logs 
ALERT         rdb.ha.mboxError: Bidirectional failover under the 'cluster HA' configuration is not currently functional due to problem with the on-disk mailboxes.

From command output
   *>Cluster ha show 



   High Availability Configured: true
   High Availability Backend Configured (MBX): false

   Warning: Cluster HA is not working correctly. Make sure that both nodes are healthy by using the "cluster show" command; then reconfigure cluuster HA to correct the configuration. Check the output of "cluster ha show" following the reconfiguration to verify node
   health. If reconfiguring cluster HA does not resolve the issue, contact technical support for assistance.


First verify, the VLDBs are in sync , especially MGWD. Once the VLDBs were verified, the cluster HA was disabled and enabled. 

::*> cluster ha  modify -configured false

Warning: The High Availability (HA) configuration SFO mailbox data appears to be damaged or absent, preventing a normal exit from HA configuration.  In order to forcibly exit safely, it is required that all
         management services be online on both nodes. Please verify this before continuing. The system will exit HA without zeroing the mailbox data.
Do you want to continue? {y|n}: y

Notice: HA is disabled.

::*> cluster ha show
      High Availability Configured: false
      High Availability Backend Configured (MBX): false

Warning: Cluster HA has not been configured.  Cluster HA must be configured
         on a two-node cluster to ensure data access availability in the
         event of storage failover. Use the "cluster ha modify -configured
         true" command to configure cluster HA.

::*> cluster ha  modify -configured true

Warning: High Availability (HA) configuration for cluster services requires that both SFO storage failover and SFO auto-giveback be enabled. These actions will be performed if necessary.
Do you want to continue? {y|n}: y

Notice: HA is configured in management.

::*> cluster ha show
      High Availability Configured: true
      High Availability Backend Configured (MBX): true --> YEAH!!!







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