[jira] [Created] (NIFI-2360) Improve robustness of cluster when relying on embedded zookeeper

["Mark Payne (JIRA)" <ji...@apache.org>]

Mark Payne created NIFI-2360:
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             Summary: Improve robustness of cluster when relying on embedded zookeeper
                 Key: NIFI-2360
                 URL: https://issues.apache.org/jira/browse/NIFI-2360
             Project: Apache NiFi
          Issue Type: Bug
          Components: Core Framework
    Affects Versions: 1.0.0
            Reporter: Mark Payne
            Assignee: Mark Payne
             Fix For: 1.0.0


I have a 3 node cluster running an embedded zookeeper. If 2 nodes disconnect, I no longer have a ZooKeeper quorum. As a result, the third node is also disconnected. If I had more nodes, they would also all be disconnected. As a result, I also cannot then go to the cluster page to re-connect them, since there is no cluster coordinator.

We should make this more robust, predominantly by not starting & stopping the embedded zookeeper server when a node connects & disconnects from cluster but instead just leave the embedded zookeeper server running, even when the node is disconnected from the cluster.



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