java.net.UnknownHostException: Invalid hostname for server: local

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I was having the same issue on my mac. I found the issue when I pinged my $HOSTNAME from terminal and it returned ping: cannot resolve myHostName: Unknown host.

To resolve:

  1. Do echo $HOSTNAME on your terminal.

  2. Whatever hostname it shows (lets say myHostName), try to ping it : ping myHostName. If it returns ping: cannot resolve myHostName: Unknown host then add an entry into your /etc/hosts file.

  3. For that edit /etc/hosts file and add following:

    127.0.0.1 myHostName

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