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Throw the SocketException to announce "Invalid argument" for an available port.

Root Cause

That socket may be created for IPv6 only.


  1. Use "sysctl net.ipv6.bindv6only" to check if "net.ipv6.bindv6only = 1" in the local environment, if so turn it off:
  2. If this doesn't work, try to set it by JVM parameters. Add "-Djava.net.preferIPv4Stack=true" into JAVA_OPTS. See Setting Properties and Options on Startup for more information on how to set a system property.

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