thank you for your help.
Since i have to send signals to the process, eg, Send SIGINT to tell
the process to shutdown,
send SIGHUP to tell the process to reload configuration. But if i use
"nohup", it seems that the
process can not receive any signal which is unexpected.
YU Jiazi
Francois Bolduc wrote:
Question on SSH hang on exit when running Java background
process
Just call your program with nohup like this:
$ nohup java -cp . Test &
That will tie the background process to PID 1, freeing up the
current shell to exit whenever you want, whether the java program is
done or not. Output goes to nohup.out by default in the current folder.
François Bolduc
Consultant
FUJITSU CONSEIL (Canada) inc.
Bureau : 613.238.2697
[EMAIL PROTECTED]
From: [EMAIL PROTECTED] on behalf of YU Jiazi
Sent: Fri 4/27/2007 10:25 AM
To: [email protected]
Subject: Question on SSH hang on exit when running Java
background process
hi, all
I'm not sure if i should ask this question in this maillist, i am sorry
if this mail bothered you. :)
My problem is that my SSH client hang on "exit" if I run a java program
as a background process.
Here is the sample java program:
public class Test
{
public static void main(String argv[])
{
try{
while(true) {
System.out.println("Hello world");
Thread.sleep(1000);
}
} catch(Exception ex) {
ex.printStackTrace();
}
}
}
then I save it as Test.java, and compile, run it as follow in a
terminal connected by ssh(my ssh client is putty 0.58):
javac Test.java
java -cp . Test &
exit
then putty hang, it seems that the SSH connection is still alive and
waiting for the java program to exit.
If a close the putty and login the server again, i can see the program
is still running.
This problem puzzled me a long time, since i have to run a server
program written by java and I can't
exit ssh client normally. At first i guess it was caused by signals, by
it seems that when i type "exit" even
i close the ssh client, the program didn't get a SIGHUP signal, or it
would exit by receiving a SIGHUP.
Anyway, could anyone help me on this problem?
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