Zombie process in HP-UX

Hi,
I can see many Zobmie process in my server, I tried to kill using "kill -9" but it's not working.
73 processes: 334 sleeping, 20 running, 219 zombies
Cpu states:
CPU LOAD USER NICE SYS IDLE BLOCK SWAIT INTR SSYS
0 1.23 20.7% 0.0% 6.2% 73.1% 0.0% 0.0% 0.0% 0.0%
1 1.26 87.5% 0.0% 2.2% 10.4% 0.0% 0.0% 0.0% 0.0%
avg 1.24 54.1% 0.0% 4.2% 41.7% 0.0% 0.0% 0.0% 0.0%
Memory: 7472208K (4396764K) real, 10601924K (6056332K) virtual, 12538532K free Page# 1/17
CPU TTY PID USERNAME PRI NI SIZE RES STATE TIME %WCPU %CPU COMMAND
0 ? 37 root 152 20 14432K 14432K run 58:54 0.96 0.96 vxfsd
1 ? 5103 oracle 183 20 32K 32K zomb 0:00 0.83 0.83 perl
1 ? 12908 oracle 182 20 32K 32K zomb 0:00 0.83 0.83 perl
1 ? 19125 oracle 182 20 32K 32K zomb 0:00 0.83 0.83 perl
1 ? 23338 oracle 183 20 32K 32K zomb 0:00 0.83 0.83 perl
1 ? 4207 oracle 183 20 32K 32K zomb 0:00 0.78 0.78 perl
1 ? 5097 oracle 182 20 32K 32K zomb 0:00 0.78 0.78 perl
1 ? 12933 oracle 182 20 32K 32K zomb 0:00 0.78 0.78 perl
1 ? 19094 oracle 182 20 32K 32K zomb 0:00 0.73 0.73 perl
0 ? 19281 oracle 182 20 32K 32K zomb 0:00 0.73 0.73 perl
0 ? 23333 oracle 182 20 32K 32K zomb 0:00 0.73 0.73 perl
0 ? 23341 oracle 182 20 32K 32K zomb 0:00 0.73 0.73 perl
0 ? 29699 oracle 182 20 32K 32K zomb 0:00 0.68 0.68 perl
1 ? 12077 oracle 182 20 32K 32K zomb 0:00 0.64 0.63 perl
Solution: Find the PPID and kill it.
ps -el | grep 'Z'
find the PPID of the Zombie and kill. Rest of all the zombie got killed.
Thanks
KSG
Solution found.

As Joel said.
A parent process receives a signal when one of its child processes terminates. When the parent process does not exist, the signal cannot be processed.
The kernel then keeps the basic process identifier struct of the child in memory (not very large) - after unloading the actual child process from the kernel.
The child process no longer exists. Except for the tiny process identifier struct in the process list table of the kernel.
Thus the name zombie process. Process is dead (no longer loaded). Nor can it be killed. The identifier in the process listing can only be cleared with a kernel reboot afaik.
Why exactly the Unix kernel behaves this way, I cannot recall... but there are some or another technical explanation for it.

Similar Messages

Zombie Process in the Database.

Dear All,
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Please help in the above thread.
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I've had some luck using the following code which simply
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--- Code below (Flash CS4) ---
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Hello Hermanth,
maybe you can help me again.
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Read this whole message before doing anything.
Back up all data.
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A possible cause is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
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See:
*https://support.mozilla.org/kb/Server+not+found
*https://support.mozilla.org/kb/Firewalls

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Message was edited by:
AG

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AG

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What version iTunes?
Is Norton, McAfee, ZoneAlarm, etc blocking iTunes?
Check this out
http://docs.info.apple.com/article.html?artnum=302538
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Argh argh argh argh argh.
Right.
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Adam,
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from the ps(1) manpage.
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hi,
description of my system
Oracle EBS 11.5.10 + oracle 9.2.0.5 +HP UX 11.11
problem : ther are large number of FNDSM , FNLIBR and sh processes during peak load around 300 , but even at no load these processes dont come down , though oracle processes
come down from 250 to 80 but these apps processes just dont get killed automatically .
can i kill these processes manually??
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Hi,
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one more thing , even after stopping apllications with adstpall.sh , these processes dont get killed , is it normal??, so i just dismount database so as to kill these processesNo it's not normal and should not be neglected. I should also advice you to run the [Oracle Application Object Library Concurrent Manager Setup Test|https://metalink2.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=200360.1]
and under what circumstances , should i run cmclean ?[CMCLEAN.SQL - Non Destructive Script to Clean Concurrent Manager Tables|https://metalink2.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=134007.1]
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I have an early intel xserve running 10.4.11
It is sharing one directory via SMB to a number of windows users
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Srini

defunct process when stop and start web server

Dear all,
I am using Sun One Web Server 6.1 SP6. When i try to stop and then start the web server. The <defunct> process is generated (his parent PID points to webservd).
The following is the result:
1st stop and start the web server (defunct process is generated)
2nd stop and start the web server (defunct process disappears)
3rd stop and start the web server(defunct process is generated)
4th stop and start the web server (defunct process disappears)
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ErrorLog /i03_01/SUNWwbsvr616/https-www/logs/errors
PidLog /i03_01/SUNWwbsvr616/https-www/logs/pid
User nobody
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DefaultLanguage en
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StackSize 131072
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any ideas? Thank

- which OS & version are you running into this issue ?
- By definition, defunct processes (or zombie processes) are processes that have exited prior to it's parent calling a wait() on it to get the return status .
- couple of things I can think of to narrow down the cause of this issue
1. disable ASP & php plugins and see if this still causes this issue
2. try starting the web server with log level to finest and see fi you get any useful information from the server error logs
hope this helps

[SOLVED] Arch Linux is zombie infested !!!

Sigh !
I don't know what happened but a few minute before when I rebooted my Arch Linux desktop, it started acting weird.
First thing I do is to start my torrent client Deluge, look there was no icon in the tray for it but it was shown in System-monitor.
Then I started Firefox, a few minute later the whole thing logged off. I renter my password and then again it logged of within one minute.
So I rebooted to see if that changes this time, but this time I could see was that firefox was shown as ZOMBIE process and then when I tried to take the screenshot the system hanged
Some thing I did today was
Installed Yaourt
Then installed nautilus-dropbox plugin
Dropboxd service runs in background, so is there something fishy about the dropbox service. I tried to kill it but it again restarts.
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Last edited by visio159 (2008-09-14 08:41:47)

No one replied !!! huh
Well good news is that my RAM module needed a dust cleanup. Probably due to corrupt memory it was behaving bad.
I am impressed that it (linux) logged me off when it detected that there were memory violation and corruptions to prevent any data damage ! Now can anyone explain this to me ? Is it really a feature or was just random occurring ?
Case solved, learned a lesson too.
Last edited by visio159 (2008-09-13 05:44:10)

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