[jira] [Updated] (FLINK-24769) FlameGraphs in 1.14 do not aggregate subtasks' stack traces anymore

["Nico Kruber (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-24769?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Nico Kruber updated FLINK-24769:
--------------------------------
    Affects Version/s: 1.13.3

> FlameGraphs in 1.14 do not aggregate subtasks' stack traces anymore
> -------------------------------------------------------------------
>
>                 Key: FLINK-24769
>                 URL: https://issues.apache.org/jira/browse/FLINK-24769
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / Web Frontend
>    Affects Versions: 1.14.0, 1.13.3
>            Reporter: Nico Kruber
>            Priority: Major
>         Attachments: image-2021-11-04-12-59-24-308.png
>
>
> Since Flink 1.14.0, after enabling FlameGraphs and gathering statistics for a task, it doesn't aggregate the results from the parallel instances anymore but instead shows each individual one - something that easily gets too messy for higher parallelism.
> It seems the last shared method on the stack is {{Task.runWithSystemExitMonitoring}} and then it spawns off into individual lambda functions:
>  !image-2021-11-04-12-59-24-308.png! 



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