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https://issues.apache.org/jira/browse/NIFI-483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15220554#comment-15220554
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ASF subversion and git services commented on NIFI-483:
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Commit 8886fd8463e0b0c49d9007f6da3cc8cc1921ef33 in nifi's branch refs/heads/1.x
from [~markap14]
[ https://git-wip-us.apache.org/repos/asf?p=nifi.git;h=8886fd8 ]
NIFI-483: Use ZooKeeper's Leader Election to determine Primary Node. This
closes #301
> Automatically elect a new primary node to allow rolling restarts
> ----------------------------------------------------------------
>
> Key: NIFI-483
> URL: https://issues.apache.org/jira/browse/NIFI-483
> Project: Apache NiFi
> Issue Type: Sub-task
> Reporter: Ricky Saltzer
>
> In a clustered environment, if you restart the primary node's NiFi instance,
> all of the processors scheduled on "Primary Node" will automatically be
> re-executed on start up. This is a problem if you require a processor to only
> execute once per day, for example.
> To get around this, you must manually promote a different node to primary
> before restarting it. I think it would be a worthwhile feature to have the
> primary node automatically elect another node primary if it's being
> restarted.
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