[jira] [Commented] (NIFI-5096) When Primary Node changes, occasionally both the new and old primary nodes continue running processors

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/NIFI-5096?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16444031#comment-16444031 ] 

ASF GitHub Bot commented on NIFI-5096:
--------------------------------------

GitHub user markap14 opened a pull request:

    https://github.com/apache/nifi/pull/2646

    NIFI-5096: Periodically poll ZooKeeper to determine the leader for ea…

    …ch registered role in Leader Election. This avoids a condition whereby a node may occasionally fail to receive notification that it is no longer the elected leader.
    
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You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/markap14/nifi NIFI-5096

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/nifi/pull/2646.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #2646
    
----
commit 757c4e2445d052b593fbea8f0d9a36bac001f44f
Author: Mark Payne <ma...@...>
Date:   2018-04-19T13:05:32Z

    NIFI-5096: Periodically poll ZooKeeper to determine the leader for each registered role in Leader Election. This avoids a condition whereby a node may occasionally fail to receive notification that it is no longer the elected leader.

----


> When Primary Node changes, occasionally both the new and old primary nodes continue running processors
> ------------------------------------------------------------------------------------------------------
>
>                 Key: NIFI-5096
>                 URL: https://issues.apache.org/jira/browse/NIFI-5096
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Core Framework
>            Reporter: Mark Payne
>            Assignee: Mark Payne
>            Priority: Major
>
> Occasionally we will see that Node A is Primary Node and then the Primary Node switches to Node B, resulting in both Node A and Node B running processors that are marked as Primary Node only.



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