[SOLVED] Zombie dir after cifs mount dropped, can't remount or rmdir

Zandweter · 07-14-2010, 04:29 AM

Hi Linux pro's,
Strange situation here, I'm running Centos 5.3 with multiple mounts to the windows (2k3) domain. Normaly no problems with mounting, rebooting.

Last night connection to a server broke when it rebooted. Now the mount point is unreadable and showing as a zombiefile with question marks.

Code:

root@server# ls -al
?--------- ? ?    ?       ?            ? apps
drwxrwxrwx 1 root root    0 Jul 12 09:05 apps1

The second dir 'apps1' is newly created and mounted like the former 'apps'dir

I tried touch and get input/output error,
I tried rm -rf and get "rm: cannot lstat `apps': Input/output error"
I tried rmdir and get "Device or resource busy"

I'm out of options for now so a little help would be greatly appreciated!

(rebooting is not yet a option - this is a production env)

kilgoretrout · 07-14-2010, 07:55 AM

Did you try either:

# chown -R root:root <full path to apps>

or:

# chmod -R 777 <full path to apps>

and then rm -rf?

If that doesn't work try running:

# lsof | grep <full path to apps>

That will list all processes accessing apps and give you some idea of what's going on.

Zandweter · 07-14-2010, 09:24 AM

Yes, didn't mention but chown and mod also resulted in input/output error.

Quote:

Originally Posted by kilgoretrout

# lsof | grep <full path to apps>

That will list all processes accessing apps and give you some idea of what's going on.

This results in:

Code:

[root@server]# lsof | grep /mnt/server/apps
lsof: WARNING: can't stat() cifs file system /mnt/server/apps
      Output information may be incomplete.
lsof: WARNING: can't stat() cifs file system /mnt/server/apps
      Output information may be incomplete.

so I guess that some mount issue still applies.
For now I mounted to another dir and changed the symlinks so operational processes still access the server.
The mounted server will be rebooted again tonight so I will be anxious to see what this will do to the mounts.