[Serusers] defunct process

Wong Tsang Han tsanghan at gmx.net
Fri Jun 6 16:04:45 CEST 2003

Hello All,

I have installed ser-0.8.11pre29-1 on RedHat 9.0. When I start ser by script
/etc/init.d/ser or directly using /usr/sbin/ser, the process SOMETIMES hangs
at the Aliases line show below. When I list the process table, I observed
there was a defunct process. Now, this does not happen ALL the time when I
starts ser. Sometime, /use/sbin/ser or init script will start fine without a
hiccup. I also notice that the defunct process is ALWAYS the second lowest
process id among all ser processes. Can this be a case of race condition for
the parent process to exit without waiting for the child?

I did not encounter this using ser-0.8.10 on RedHat 7.3. However, I do
remember encountering this behavior once when running ser-0.8.10 on RedHat
9.0, I have removed 0.8.10 and installed 0.8.11 since then for testing
0.8.11. Could this be a problem of RedHat 9.0? Is anyone experience this or
am I the only one?

[root at linux root]# /usr/sbin/ser
Listening on
Aliases: some.where.org:5060 linux.some.where.org:5060

2071 pts/0    S      0:00 /usr/sbin/ser
2072 ?        Z      0:00 [ser <defunct>]
2073 ?        S      0:00 /usr/sbin/ser
2075 ?        S      0:00 /usr/sbin/ser
2076 ?        S      0:00 /usr/sbin/ser
2077 ?        S      0:00 /usr/sbin/ser
2078 ?        S      0:00 /usr/sbin/ser
2079 ?        S      0:00 /usr/sbin/ser

Thanks for the great software guys.

Tsang Han Wong

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