Possible duplicate of [java.net.SocketException: Connection reset](https://stackoverflow.com/questions/62929/java-net-socketexception-connection-reset)
– Amit VaghelaSep 29 '17 at 10:01
Something might be using that port. Try this https://stackoverflow.com/questions/41305611/change-android-studio-debug-port to change your port number to something more obselete
– Orkun KocyigitSep 29 '17 at 10:01
Check this https://stackoverflow.com/questions/32381180/how-to-fix-the-error-unable-to-open-debugger-port-in-android-studio The port at 8603 might be used by other service
– Kartik ShandilyaSep 29 '17 at 10:01