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Unable To Open Debugger Port (localhost:8603): Java.io.ioexception "handshake Failed - Connection Prematurally Closed"

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Error running Android Debugger (8603): Unable to open debugger port (localhost:8603): java.io.IOException 'handshake failed - connection prematurally closed' use android studio3.0.

Solution 1:

Tools > Android > Enable ADB Integration

Disable then re-enable.

Good to go! Hope this helps anyone in the future I was doing a full restart until I discovered this temp fix.

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