MetroCluster monitoring failed in Unified Manager 7.2 with Reason: An internal error has occurred during MetroCluster component refresh post re-cabling at switch ports

Applies to

OnCommand Unified Manager (OCUM) 7.2 only
Any MetroCluster (MCC) version interoperable with OCUM 7.2

Issue

• In "Configuration" menu, "Cluster Data Sources" tab, MCC clusters will have this message in Description column: "Monitoring failed..."

• Event created with title "Event: Cluster Monitoring Failed" and Trigger Condition: "Monitoring failed for cluster <MCC-CLUSTER>. Reason: An internal error has occurred during MetroCluster component refresh. Contact technical support."

Collecting a support bundle, or directly looking at collected log "ocum-error.log", will have the following entry:

"ERROR [oncommand] [collection-completion-0] [c.n.d.i.m.MccFabricConfigDiscoveryHandler] MetroCluster monitoring failed for <MCC-CLUSTER>"

 

2018-11-13 00:28:06,697 ERROR [oncommand] [collection-completion-0] [c.n.d.i.m.MetroClusterRefreshCollectionCompletionListener] MetroCluster monitoring failed for MCC_CLUSTER_NAME at 00:28:06.
2018-11-13 00:28:07,646 ERROR [oncommand] [reconcile-2] [MCC_CLUSTER_NAME(incremental@00:28:05.083)] [c.n.dfm.collector.OcieJmsListener] Error during MetroCluster component monitoring : expected one element but was: <[2b:2], [2d:2]>