problem with ServerSocket on Linux

[gabriel]

I created a server class with ServerSocket, and run it on Linux, when the Linux is rebooted, the client side could not feel it. It is still pending at "read" method instead of -1 returned from the method.
It works when it is not run in daemon.
Why?

[fred]

Does the JVM notify daemon threads of a JVM shutdown? I can imagine a scenario where the OS tells the JVM to terminate. The JVM will shutdown, but the deamon threads will not be interrupted by the shutdown.
See: PhySci.codes - Short, Self Contained, Compilable Example and How to get answers on the comp.lang.java.* newsgroups