see BlockingStreamingTextTest - it is currently ignored, as it breaks due to this bug.
The client sends partial strings, and on the server side, it seems that for every partial string received, a new call to onMessage() method is made. I believe this is wrong (flawed) as the CharacterStream.onMessage() method has no means to determine when the last part of the string came - so IMO should receive the full string (i.e. keep receiving string parts until the last is received) rather than invoking new handler for every part.
Once this bug is fixed, the @Ignore annotation should be removed from the test so that it runs as part of the build.