if (System.getProperty(“detach”).equals(“false”)) {
// Log message about no detach or something
} else {
System.in.close();
System.out.close();
System.err.close();
}

Now if you are getting weird crashes and expect that you may have an out of memory error or something that is getting printed to stderr, just include the -Ddetach=false system property in your startup command. When you have captured the information you need, remove the system property, or set it to anything other than false, and your program will detach as expected.

I am using a client server program for my project. The problem that i am having is that i run the server in the background. It runs perfectly but after some time say 10-12 days even though the program is running which I can see by using the Unix command ps- u project, there is no response from the server. Please can any one tel me what the problem is????. The command that I am using to run the server in the background is :

nohup command 2>/dev/null 1>/dev/null &

Thanks

thanks

I don’t know what shell or terminal you are using, but with bash and a standard xterm closing System.in, System.out and System.err makes no difference to whether a hangup signal is sent to the java process.

Closing the xterm by clicking the X button causes a hangup signal to be sent. Closing the xterm by typing ‘exit’ or cntrl-D does NOT cause a hangup to be sent. In neither case does closing the input/output make any difference to the behaviour.

Do you have something other than the hangup signal in mind when you say that the “shell will not kill the program”?

static public File getPidFile ()
{
return new File(System.getProperty(“daemon.pidfile”));
}

I have used your method for years without any problems – thanks so far!!

Since the latest ubuntu update, the daemon does not start correctly when booting. The daemon starts (I get my log entries, the java app works fine), but then gets terminated after 5 secs.

I don’t see any information in a log file. Do you have any hint how to analyse this?

while(true) is a BAD idea.

Any suggestion for this problem???

Thanks!