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https://issues.apache.org/jira/browse/FLINK-33042?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17762324#comment-17762324
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Feng Jin commented on FLINK-33042:
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+1 for this, it will help to troubleshoot the slow initialization issues.
> Allow trigger flamegraph when task is initializing
> ---------------------------------------------------
>
> Key: FLINK-33042
> URL: https://issues.apache.org/jira/browse/FLINK-33042
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / REST, Runtime / Web Frontend
> Reporter: Rui Fan
> Assignee: Rui Fan
> Priority: Major
> Attachments: image-2023-09-06-15-43-37-075.png
>
>
> Currently, the flamegraph can be triggered when task is running.
> After FLINK-17012 and FLINK-22215, flink split the running to running and
> initializing. We should allow trigger flamegraph when task is initializing.
> For example, the initialization is very slow, we need to troubleshoot.
>
> Here is a stack example, task is rebuilding the rocksdb after the parallelism
> is changed.
>
> !image-2023-09-06-15-43-37-075.png!
>
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