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https://issues.apache.org/jira/browse/NIFI-9603?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17479429#comment-17479429
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Joe Witt commented on NIFI-9603:
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Hello can you please publish a PDF or set of images instead of a word doc?
> When a processor group is stopped or started in the UI, the thread pool
> cannot execute any tasks
> ------------------------------------------------------------------------------------------------
>
> Key: NIFI-9603
> URL: https://issues.apache.org/jira/browse/NIFI-9603
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Affects Versions: 1.9.0
> Environment: nifi version:1.9.0
> Server：CentOS Linux release 7.9.2009
> Deployment mode: 5-node cluster
> The maximum timer driven thread count is set to 350
> JDK version is "1.8.0_181"
> Reporter: liuke
> Priority: Major
> Attachments: description.docx
>
> Original Estimate: 192h
> Remaining Estimate: 192h
>
> See the attachment for the picture
>
> Problem phenomenon
> # This problem is probably triggered when a processor group (including
> multiple processors) is stopped in the interface
> # Nifi cluster interface activethreadcount becomes 0
> # The task cannot be executed. The UI shows that the thread is stuck
> # Analysis using jstack，{*}The stack information is intercepted many times
> at a long time interval,{*} and the information is the following results:
> total 300 thread, one of which is timed_ Waiting, The remaining 299 are
> waiting
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