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Date: Tue, 23 Jan 2001 23:46:45 -0800 (PST)
From: jsmethers@pdq.net
To: freebsd-gnats-submit@FreeBSD.org
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Subject: kern/24593: NFS hang between stable and current boxes
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>Number:         24593
>Category:       kern
>Synopsis:       NFS hang between stable and current boxes
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jan 23 23:50:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Jason Smethers
>Release:        -stable ~12-19-2000 and -current snap 1-5-2001
>Organization:
>Environment:
FreeBSD xxx.xxx.xxx.xxx 4.2-STABLE FreeBSD 4.2-STABLE #0: Tue Dec 19 14:54:27 CST 2000 jason@xxx.xxx.xxx.xxx:/usr/obj/usr/src/sys/P90 i386
>Description:
Both boxes NFS hung at the same time with each reporting a mount from the other machine not responding. In the case of the -stable machine it was the -current box's /mnt mounted on /var/ftp/incoming and on the -current machine it was the -stable box's /. The -stable box reports the -current box not responding at 3:22AM. ps -x on the -stable box reports the suspicious unkillable process:

"root 31885 0.0 0.7 896 448 ?? D 3:22AM 0:00.19 find /var -xdev -type f ( -perm -u+x -or perm -g+x -"

which I summize is from the scripts in /etc.

Unfortunatly on both boxes a mount related command (e.g. df, umount) hang a login and don't respond to kill -9 so I am not able to obtain any more information from the -current box untill it reboots.

I was about the put the latest snap on the -current box too. =/
>How-To-Repeat:
I'd guess running the security script in /etc that runs the find on /var while /var contains a NFS mount within its hierarchy.
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted:


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