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https://issues.apache.org/jira/browse/FLINK-35160?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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elon_X updated FLINK-35160:
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Attachment: (was: image-2024-04-18-21-00-04-532.png)
> Support for Thread Dump provides a convenient way to display issues of thread
> deadlocks in tasks
> ------------------------------------------------------------------------------------------------
>
> Key: FLINK-35160
> URL: https://issues.apache.org/jira/browse/FLINK-35160
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / REST
> Affects Versions: 1.16.0, 1.17.1, 1.19.0, 1.18.1
> Reporter: elon_X
> Priority: Major
> Attachments: image-2024-04-18-20-57-52-440.png,
> image-2024-04-18-20-58-09-872.png, image-2024-04-18-21-01-22-881.png,
> image-2024-04-18-21-34-41-014.png, image-2024-04-20-14-43-36-939.png
>
>
> After receiving feedback from the business side about performance issues in
> their tasks, we attempted to troubleshoot and discovered that their tasks had
> issues with thread deadlocks. However, the Thread Dump entry on the Flink
> page only shows thread stacks. Since the users are not very familiar with
> Java stacks, they couldn't clearly identify that the deadlocks were due to
> issues in the business logic code and mistakenly thought they were problems
> with the Flink framework
> !image-2024-04-18-20-57-52-440.png!
> !image-2024-04-18-20-58-09-872.png!
> the JVM's jstack command can clearly display thread deadlocks, unfortunately,
> the business team does not have the permissions to log into the machines.
> hear is the jstack log
> !image-2024-04-18-21-00-04-532.png!
> FlameGraph are excellent for visualizing performance bottlenecks and hotspots
> in application profiling but are not designed to pinpoint the exact lines of
> code where thread deadlocks occur.
> !image-2024-04-18-21-01-22-881.png!
> Perhaps we could enhance the Thread Dump feature to display thread deadlocks,
> similar to what the {{jstack}} command provides.
>
> !image-2024-04-18-21-34-41-014.png!
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