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https://issues.apache.org/jira/browse/NIFI-10015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17537290#comment-17537290
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Hadiiiiiiiii commented on NIFI-10015:
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this page will some help. [LeaseRenewer#daemon threads leak in
DFSClient|https://issues.apache.org/jira/browse/HDFS-14575]
> PutHDFS has so many daemon thread "LeaseRenewer"
> ------------------------------------------------
>
> Key: NIFI-10015
> URL: https://issues.apache.org/jira/browse/NIFI-10015
> Project: Apache NiFi
> Issue Type: Bug
> Components: Extensions
> Affects Versions: 1.15.3
> Environment: Linux 3.10.0-957.el7.x86_64
> Reporter: Hadiiiiiiiii
> Priority: Minor
> Attachments: image-2022-05-11-14-01-25-238.png,
> image-2022-05-11-14-03-33-639.png, image-2022-05-11-14-04-01-236.png
>
>
> I saw the NiFi Cluster SYSTEM，and the Daemon Threads is over 5000.
> !image-2022-05-11-14-03-33-639.png!
> so I find the LeaseRenewer Thread by jstack.
> !image-2022-05-11-14-04-01-236.png!
> !image-2022-05-11-14-01-25-238.png!
> why so many deamon thread?
>
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