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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