It seems that you are experiencing a network issue that doesn’t let you to establish a connection to the remote host. I found a similar issue on this StackOverflow post <https://stackoverflow.com/questions/31252915/unknownhostexception-java> that might be helpful. In case your issue still persists I would recommend posting the question on StackOverflow or file a defect report on Public Issue Tracker. <https://issuetracker.google.com/> Please visit our community support page for list of StackOverflow tags [1].
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