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

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

     [ https://issues.apache.org/jira/browse/NIFI-2360?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mark Payne updated NIFI-2360:
-----------------------------
    Status: Patch Available  (was: Open)

> 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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