Free a used port after program crash
 

High,

I'm using lmule on my RedHat.
Sometimes it crashes and then the port tcp 4662 is still used.

I need to free the port in order to avoid reboot and simply reload lmule after a program crash.

Any idea how i can do that ?

Thanks in advance !

Dek

type top and locate pid of the lmule
then type kill <pid> as root this should sove your problem

What's the point in killing an already crashed application? It doesn't make sense.
I don't remember "ps -e" or "ps -u root" (or whatever account) showing it after the crash ...

Yet i will try but i doubt it would be an efficient solution ...

Any other suggestion ?

Dek

some applocation work in two way core and gui when gui crash es core still runs. next time before judgeing first try it :)

I see ... well i said i will try next time it crashes. Will keep you post in that thread.

Dek

Try restarting xinetd:

# /etc/rc.d/initd.d/xinetd restart

Top-killing PID is not working ; restarting xinetd is not working.

Any other idea ?

Dek

kill -9

Terminate it!

the problem is FIN_WAIT connection. you can do nothing about it. use netstat -ta | grep 4662 to determine when all left connections are dead. then run lmule again.

Agreed. My lmule also used to crash on RH9 (although the latest version available via freshrpms.net apt is a lot more stable). The port usually became available again within 90 seconds of the crash.

Ok, that's interesting, very interesting. I will pay attention next time it crashes (of course it did not went you wait it to crash :) lol).

Thanks all of you !

Dek

Addenda :
Well it crash that night. At that moment "netstat" did not report the use of port 4662 (???), "netstat -ta | grep 4662" send nothing.
So i launch again lmule and got the error 4662 unreachable.
I quit. sent the command "netstat -ta | grep 4662" until no one use the port 4662. Then, i block the port 4662 in iptables and restart that one. And just after, reopen the port 4662 and restart iptables. I then go into the lmule directory in my user home and delete the con file (with size 0kb). I also delete the file in /temp/orbit-"myuser" the con file that where changed when i quit lmule.
Consequence, i start lmule again and got a high ID.

Maybe it was something to do with con files (created for each port opened).
I will try to narrow my suspects later. It seems i solve my problem (i'll be sure the next time) and i hope these lines will help others.

Dek