[jira] [Created] (FLINK-13184) Support launching task executors with multi-thread on YARN.

[Shang Yuanchun (Jira)]

Xintong Song created FLINK-13184:
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             Summary: Support launching task executors with multi-thread on YARN.
                 Key: FLINK-13184
                 URL: https://issues.apache.org/jira/browse/FLINK-13184
             Project: Flink
          Issue Type: Bug
          Components: Deployment / YARN
    Affects Versions: 1.8.1, 1.9.0
            Reporter: Xintong Song
            Assignee: Xintong Song


Currently, YarnResourceManager starts all task executors in main thread. This could cause RM thread becomes unresponsive when launching a large number of TEs (e.g. > 1000), leading to TE registration/heartbeat timeouts.

 

In Blink, we have a thread pool that RM starts TEs through the YARN NMClient in separated threads. I think we should add this feature to the Flink master branch as well.



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