[xSocket-develop] Maybe Problem with ACK

[Johann H. <ho...@in...>]

Hello,
My goal is to write a xSocketClient which can connect to a Script 
written in Python using the Twisted Framework.
So I started experimenting and now I have a Problem.
I wrote a simple xSocketServer and from Python I was able to connect to 
it and to receive and send lines. Everything worked perfectly.
BUT: Then I tried it the other way round and it didn't work.
I tried to open a NonBlockingConnection to my Server running in Python. 
The Python Server recognized, that there is a incoming connection, but 
it seems, that a kind of ACK is missing, because the 
NonBlockingConnection runs into a timeout (well, I think it's a timeout, 
because it appears after the defined timeout):
Exception in thread "main" java.lang.NullPointerException
   at 
org.xsocket.connection.NonBlockingConnection.isDataWriteable(NonBlockingConnection.java:943)
   at 
org.xsocket.connection.AbstractNonBlockingStream.ensureStreamIsOpenAndWritable(AbstractNonBlockingStream.java:1533)
   at 
org.xsocket.connection.AbstractNonBlockingStream.write(AbstractNonBlockingStream.java:1043)
   at 
org.xsocket.connection.AbstractNonBlockingStream.write(AbstractNonBlockingStream.java:1028)
   at ConnectToTwisted.main(ConnectToTwisted.java:54)

So: What kind of answer do I have to send to the client, that he 
recognizes, that the connection is established?

Greetings
Joe