[jira] [Created] (FLINK-3451) NettyServer port is determined via NetUtils.getAvailablePort()

[Shang Yuanchun (Jira)]

Ufuk Celebi created FLINK-3451:
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             Summary: NettyServer port is determined via NetUtils.getAvailablePort()
                 Key: FLINK-3451
                 URL: https://issues.apache.org/jira/browse/FLINK-3451
             Project: Flink
          Issue Type: Bug
          Components: Distributed Runtime
            Reporter: Ufuk Celebi
            Assignee: Ufuk Celebi


During start up, the {{NettyServer}} port is configured via {{NetUtils.getAvailablePort()}}. In most cases, this works as expected, but it is possible that another service grabs the port while it is available (between the check and {{NettyServer}} initialization).

It is more robust to let {{NettyServer}} pick the port itself no port is specified.

In general the {{getAvailablePort-then-setConfig}} pattern is not recommended.




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