This is exactly what I also say in test application I was building. I register a server socket, everything works fine. If I close my app, register the a server socket on the same onion address the client can't connect.
With the error: couldn't connect to an introduction point of 4xuwatxuqzfnqjuz
This was run with the latests source silvertubbel commit 7e52078.
I'm running OSX 10.10.2 & java 1.8.0_25-b17.
I can not reproduce this error, I was running the full set of Unittest with the following JDKs:
Oracle JDK 1.6 + 1.7 + 1.8
OpenJDK 1.6 + 1.7
Could you provide the logs?
As this issue could not be reproduced I will close the ticket.