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https://issues.apache.org/jira/browse/NIFI-1900?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15344705#comment-15344705
 ] 

ASF subversion and git services commented on NIFI-1900:
-------------------------------------------------------

Commit 36ab8474dd49267ca0db8b176b7b61d9d31c8dc4 in nifi's branch 
refs/heads/master from [~markap14]
[ https://git-wip-us.apache.org/repos/asf?p=nifi.git;h=36ab847 ]

NIFI-1900: Verify that connection's destination is not running when trying to 
change destination

This closes #550


> NiFi allows connections to be moved between processors in cluster when it 
> should not
> ------------------------------------------------------------------------------------
>
>                 Key: NIFI-1900
>                 URL: https://issues.apache.org/jira/browse/NIFI-1900
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Core Framework
>    Affects Versions: 0.6.1
>            Reporter: Matthew Clarke
>            Assignee: Mark Payne
>             Fix For: 1.0.0
>
>
> *** The result of this bug is one or more dropped nodes from the NiFi cluster 
> requiring flow.xml.gz removal and restart of any dropped nodes.
> Scenario that causes bug:
> 1. NiFi multi-node cluster setup.
> 2. Active flow between two processors.
> 3. Destination processor has actively running threads.
> 4. Stop destination processor.
> 5. Destination processor still has active threads after stop but not on every 
> node.
> 6. Drag processor connection to new destination processor.
> 7. Those nodes where the original destination processor did not have active 
> threads successfully move connection.  
> 8. Those nodes with hung or active threads fail to move connection and are 
> then dropped from cluster because of flow no longer matches what is on NCM.
> Recovery requires remove of flow.xml.gz on all dropped nodes and restart of 
> those nodes.



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