Today two application server start going weird. Top and ps doesnt gave any clue. Try restarting the process also no use. The process will die eventually after 2-3 minutes. Try call my collegue but he didnt answer. Maybe busy with the forum 
.
Then I remember once he said to me check the defunct function or in other words is zombie process. When I run ps and grep defunct the output show that the Java process already become zombie process. No wonder the application always die when i restart it. So how to kill zombie process?
As far as I know zombie process cant be kill. Try to kill it nothing happen . The only solution is to reboot the server. But before reboot I try google and found this mailing list. Guess who is looking for the same solution? It’s my collegue hehehe . And the solution that he found can be read below
How to kill a zombie
By: Steve Evenden
Issue date: 10/26/04 Section: Features
Article Tools:Email This ArticlePrint This Article Page 1 of 110. Throw records
Doesn’t really kill zombies, but it’s one hell of a way to clean up a bad record collection.9. Chainsaw
The chainsaw can cut through even the thickest skull and will destroy a brain in seconds.8. Toaster
When swung by the cord, one can get incredible velocity; also makes toast.7. Hammer
Another popular tool. Good for the strong and weak alike, and perfect for the novice zombie killer.6. Fire poker
Heavy, well sized, and very versatile, serving the stab-happy and blunt-crazy zombie killer alike.5. Pump-action shotgun
Most movie characters are terrible with the shotgun, but it’ll always be a popular choice.4. The Old Door Trick
When zombies try to come in, slam the door on its head.3. Rocket Launcher
Legend has it a U.S. college student wrote an essay called, “The Best Way to Kill a Zombie is with a Rocket Launcher.” Who could argue with that?2. “The View”
To kill a zombie, you must destroy its brain, and what better way to do that than listening to Starr Jones and Meredith Viera?1. Motorcycle
Go Milla Jovovich! Her scene riding her bike down the aisle of a church in RE:2 was amazing. A must in any zombie invasion.
This howto was extract from this website
