src/main/java/org/java_websocket/WebSocketImpl.java
private void closeConnectionDueToInternalServerError( RuntimeException exception ) {
		write( generateHttpResponseDueToError( 500 ) );
		flushAndClose( CloseFrame.NEVER_CONNECTED, exception.getMessage(), false );
	}
private void closeConnectionDueToInternalServerError( RuntimeException exception ) {
		write( generateHttpResponseDueToError( 500 ) );
		flushAndClose( CloseFrame.NEVER_CONNECTED, exception.getMessage(), false );
	}
Close the connection if there was a server error by a RuntimeException

@param exception the RuntimeException causing this problem