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https://issues.apache.org/jira/browse/NIFI-2999?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15658060#comment-15658060
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ASF subversion and git services commented on NIFI-2999:
-------------------------------------------------------

Commit b73ba7f8d4f6319881c26b8faad121ceb12041ab in nifi's branch 
refs/heads/master from [~markap14]
[ https://git-wip-us.apache.org/repos/asf?p=nifi.git;h=b73ba7f ]

NIFI-2999: When Cluster Coordinator changes, purge any old heartbeats so that 
we don't disconnect a node due to very old heartbeats

This closes #1210


> In NiFI Cluster, new cluster coordinator election could result in all nodes 
> being dropped.
> ------------------------------------------------------------------------------------------
>
>                 Key: NIFI-2999
>                 URL: https://issues.apache.org/jira/browse/NIFI-2999
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Core Framework
>    Affects Versions: 1.0.0
>            Reporter: Matthew Clarke
>            Assignee: Mark Payne
>             Fix For: 1.1.0
>
>
> When NiFi elects a new cluster coordinator, the newly elected coordinator 
> starts accepting heartbeats from the cluster nodes. If another cluster 
> coordinator election occurs later which results in the original Node being 
> elected as the cluster coordinator once again, old heartbeat messages exist 
> which will trigger all nodes to be dropped due to their age exceeding the 
> threshold for last received heartbeat.



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