[jira] [Created] (FLINK-17024) Make RpcEndpoint#getRpcService#getExecutor return a custom thread pool

[Shang Yuanchun (Jira)]

Yang Wang created FLINK-17024:
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             Summary: Make RpcEndpoint#getRpcService#getExecutor return a custom thread pool
                 Key: FLINK-17024
                 URL: https://issues.apache.org/jira/browse/FLINK-17024
             Project: Flink
          Issue Type: Improvement
          Components: Runtime / Coordination
            Reporter: Yang Wang


Follow the discussion in this PR[1].

Currently, {{RpcEndpoint#getRpcService#getExecutor}} return the akka underlying dispatcher thread pool. It should not be used since it will take the risk to affect the main thread of rpc endpoint. We could return a custom thread pool instead. The it is safe to used for some I/O operations  in the {{RpcEndpoint}}, for example, {{stopPod}} in {{KubernetesResourceManager}}. An elastic thread pool(from 4 up to 16) is enough.

 

[1]. [https://github.com/apache/flink/pull/11427#discussion_r402738678]



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