Orphaned process "D" state Post: 303034301

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Operating Systems Linux Red Hat Orphaned process "D" state Post 303034301 by Phat on Tuesday 23rd of April 2019 02:38:37 AM

04-23-2019

Registered User

Hi Neo,

Quote:

You can check to see what is the parent process, and if possible you can kill or restart the parent process (as long as the parent process is not the root process).

It's orphan process, not zombie, and its PPID is 1 Smilie

Code:

[root@xxx:~]# ps -ef | grep dsmc
root     13613     1  0 Apr19 ?        00:00:00 dsmc q systeminfo policy -console
root     17067 12166  0 14:33 pts/2    00:00:00 grep dsmc
root     21870     1  0 Apr22 ?        00:00:00 dsmc

Hi MadeinGermany

Quote:

It makes sense to guess the blocking device, and fix it. Once fixed, the proceses will leave the D state and continue.

You mean guessing the IO devices (disks) ? The root cause of this is that the NFS server was disconnected unexpectedly and caused the NFS mounted folder became unresponsive, I have forced unmount and remount when the NFS server is back. And cannot kill it.

Hi Yoda,
I have tried your command

Code:

ps -eo pid,ppid,state,wchan=WIDE-WCHAN-COLUMN,comm,args | ( read -r; printf "  %s\n" "$REPLY"; grep <your process name/pid> )

And resulted in as below:

Code:

[root@xxx:~]# ps -eo pid,ppid,state,wchan=WIDE-WCHAN-COLUMN,comm,args | ( read -r; printf "  %s\n" "$REPLY"; grep 13613 )
    PID  PPID S WIDE-WCHAN-COLUMN COMMAND         COMMAND
13613     1 D cifs_reconnect_tc dsmc            dsmc q systeminfo policy -console

[root@xxx:~]# ps -eo pid,ppid,state,wchan=WIDE-WCHAN-COLUMN,comm,args | ( read -r; printf "  %s\n" "$REPLY"; grep 21870 )
    PID  PPID S WIDE-WCHAN-COLUMN COMMAND         COMMAND
21870     1 D cifs_reconnect_tc dsmc            dsmc

Look like it matches with my finding above (nfs disconnected). Now the nfs mounted folders are back. As the state D, so we cannot kill it, a reboot only can help clearing it?

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