This event might be caused by a connection failure between source clusters and target clusters.
Verify that the node pool specified in the event message includes one or more nodes that are able to reach the target cluster.
If no nodes from the source cluster are able to reach the target cluster, attempt to resolve the connectivity issue.
If the event persists, gather logs, and then contact EMC Isilon Technical Support for additional troubleshooting. For instructions, see Gathering cluster logs.