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Date: Tue, 23 Jan 2001 23:46:45 -0800 (PST)
From: jsmethers@pdq.net
To: freebsd-gnats-submit@FreeBSD.org
Subject: NFS hang between stable and current boxes
X-Send-Pr-Version: www-1.0

>Number:         24593
>Category:       kern
>Synopsis:       NFS hang between stable and current boxes
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jan 23 23:50:01 PST 2001
>Closed-Date:    Sat Mar 2 09:05:08 PST 2002
>Last-Modified:  Sat Mar 02 09:05:57 PST 2002
>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:

From: "Jason Smethers" <jsmethers@pdq.net>
To: <freebsd-gnats-submit@FreeBSD.org>, "Jason" <jsmethers@pdq.net>
Cc:  
Subject: Re: kern/24593: NFS hang between stable and current boxes
Date: Wed, 24 Jan 2001 02:08:03 -0600

 The -current box actually hung for any utility run on it. As an
 interesting side effect it also hung during shutdown because it tried
 to write the entropy file and thus required a physical reset of the
 machine.
 
 The -stable box got to the "syncing disks... done" and then also
 required a physical reset.
 
 - Jason
 
 
State-Changed-From-To: open->feedback 
State-Changed-By: iedowse 
State-Changed-When: Sun Nov 18 12:20:59 PST 2001 
State-Changed-Why:  

Does this problem still occur? 

http://www.FreeBSD.org/cgi/query-pr.cgi?pr=24593 
State-Changed-From-To: feedback->closed 
State-Changed-By: iedowse 
State-Changed-When: Sat Mar 2 09:05:08 PST 2002 
State-Changed-Why:  

Feedback timeout. 

http://www.FreeBSD.org/cgi/query-pr.cgi?pr=24593 
>Unformatted:
