Mark Payne created NIFI-5111: -------------------------------- Summary: When cluster coordinator is changed, it can kick nodes out of the cluster Key: NIFI-5111 URL: https://issues.apache.org/jira/browse/NIFI-5111 Project: Apache NiFi Issue Type: Bug Reporter: Mark Payne Assignee: Mark Payne Fix For: 1.7.0
If Node A is elected cluster coordinator, all of the nodes in the cluster will begin to send it heartbeats. It will store the latest heartbeat from each node into a map along with a timestamp. If Cluster Coordinator role is then delegated to another node and later Node A is elected again, it has potentially very old, stale heartbeats. If it begins to monitor these heartbeats before receiving a new heartbeat from a node, it will determine that said node has not sent a heartbeat since before Node A lost its role as Cluster Coordinator. We need to ensure that we are clearing out any previously stored heartbeats when a node loses its role as Cluster Coordinator. -- This message was sent by Atlassian JIRA (v7.6.3#76005)