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https://issues.apache.org/jira/browse/NIFI-9389?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17445539#comment-17445539
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Paul Grey commented on NIFI-9389:
---------------------------------
Null guard around the reference to "this.externalProcess.isAlive()" in the
"@OnUnscheduled" method should be sufficient.
> ExecuteProcess incompatibility with scheduling configuration "Execution /
> Primary Node"
> ----------------------------------------------------------------------------------------
>
> Key: NIFI-9389
> URL: https://issues.apache.org/jira/browse/NIFI-9389
> Project: Apache NiFi
> Issue Type: Bug
> Reporter: Paul Grey
> Priority: Trivial
> Attachments: exception.txt
>
>
> When an "ExecuteProcess" processor is configured to run only on the primary
> node of a cluster, the "Run Once" and "Stop" commands cause an NPE to be
> thrown on all non-primary nodes.
> This would also happen on any node if the "Cron" scheduling strategy was
> used, and the processor was started and stopped without being triggered by
> the cron expression.
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