AW: <defunct> process in AIX

There is no way to remove a zombie process except by rebooting. I doubt that AIX would allow you to remove the /dev/tty1 while it is in use.

How does the C program terminate? Is it killed manually? Kill -9 doesn't give the process a chance to do a cleanup, such as closing open files.

To avoid zombies one solution would be to use something like the alarm() system call and
a signal handler in the C program. This way the C program could handle situations
like timeouts/hangings on the port and signals sent to the process.

Hope this helps.

> ----------
> Von: Rahul[SMTP:rahul_at_ratelindo.co.id]
> Gesendet: Mittwoch, 10. Januar 2001 11:05
> An: Multiple recipients of list ORACLE-L
> Betreff: <defunct> process in AIX
>
> List,
> we are running oracle 816 on AIX H70, we use the tty port to communicate
> with a telephone switch, program written in 'C' reads from Oracle and
> writes the command to the '/dev/tty1' .
>
> the problem is that sometimes the port hangs and we find a zombie <defuct>
>
> process hanging in memory...... it does not allow to drop and recreate the
> port also..
> says... "specified device is busy..."
>
> is there any way to clear the <defunct> process ? and/or drop/recreate the
> TTY port ??
>
> previously we used to re-boot the machine, but this is not an option now..
>
> Regards
>
> Rahul
>
>
>
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> Author: Rahul
> INET: rahul_at_ratelindo.co.id
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Received on Wed Jan 10 2001 - 08:39:18 CST