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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