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https://issues.apache.org/jira/browse/NIFI-2976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15651449#comment-15651449
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Joseph Witt commented on NIFI-2976:
-----------------------------------
removed fix version until there is review/contrib traction.
> NullPointerException thrown if attempting to reconnect to cluster but
> reconnection fails
> ----------------------------------------------------------------------------------------
>
> Key: NIFI-2976
> URL: https://issues.apache.org/jira/browse/NIFI-2976
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Reporter: Mark Payne
>
> If we have a case where the Cluster Coordinator requests that Node A re-join
> the cluster, but Node A fails to join, Node A will throw a
> NullPointerException, with the following stack trace:
> {code}
> 2016-10-31 16:35:49,354 ERROR [Reconnect to Cluster]
> o.a.nifi.controller.StandardFlowService Handling reconnection request failed
> due to: org.apache.nifi.cluster.ConnectionException: Failed to connect node
> to cluster due to: java.lang.NullPointerException
> org.apache.nifi.cluster.ConnectionException: Failed to connect node to
> cluster due to: java.lang.NullPointerException
> at
> org.apache.nifi.controller.StandardFlowService.loadFromConnectionResponse(StandardFlowService.java:901)
> [nifi-framework-core-1.0.0.2.0.1.0-12.jar:1.0.0.2.0.1.0-12]
> at
> org.apache.nifi.controller.StandardFlowService.handleReconnectionRequest(StandardFlowService.java:599)
> [nifi-framework-core-1.0.0.2.0.1.0-12.jar:1.0.0.2.0.1.0-12]
> at
> org.apache.nifi.controller.StandardFlowService.access$300(StandardFlowService.java:97)
> [nifi-framework-core-1.0.0.2.0.1.0-12.jar:1.0.0.2.0.1.0-12]
> at
> org.apache.nifi.controller.StandardFlowService$2.run(StandardFlowService.java:404)
> [nifi-framework-core-1.0.0.2.0.1.0-12.jar:1.0.0.2.0.1.0-12]
> at java.lang.Thread.run(Thread.java:745) [na:1.8.0_45]
> Caused by: java.lang.NullPointerException: null
> at
> org.apache.nifi.controller.StandardFlowService.loadFromConnectionResponse(StandardFlowService.java:863)
> [nifi-framework-core-1.0.0.2.0.1.0-12.jar:1.0.0.2.0.1.0-12]
> ... 4 common frames omitted
> {code}
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