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Bug 74087 - (FS NFS QUOTA)System hangs with dqputduplicate() error
(FS NFS QUOTA)System hangs with dqputduplicate() error
Product: Red Hat Linux
Classification: Retired
Component: kernel (Show other bugs)
i686 Linux
medium Severity high
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Assigned To: Stephen Tweedie
Brian Brock
Depends On:
  Show dependency treegraph
Reported: 2002-09-15 13:30 EDT by Christian Rose
Modified: 2008-08-01 12:22 EDT (History)
3 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2004-09-30 11:39:55 EDT
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Contents of /proc/cpuinfo (372 bytes, text/plain)
2002-09-15 13:31 EDT, Christian Rose
no flags Details
Output of /sbin/lspci (590 bytes, text/plain)
2002-09-15 13:32 EDT, Christian Rose
no flags Details
Output of /sbin/lspci -n (313 bytes, text/plain)
2002-09-15 13:33 EDT, Christian Rose
no flags Details
Contents of /etc/fstab (1.14 KB, text/plain)
2002-09-15 13:34 EDT, Christian Rose
no flags Details

  None (edit)
Description Christian Rose 2002-09-15 13:30:39 EDT
From Bugzilla Helper:
User-Agent: Mozilla/5.0 Galeon/1.2.6 (X11; Linux i686; U;) Gecko/20020827

Description of problem:
We've experienced system hangs (box responds to pings but not to logins or
anything that requires filesystem access) on a production nfs server on three
occasions since the middle of June. On each of the three occasions, the problem
seems to have been triggered when there is heavy disk access, such as during the
nightly crond runs. At the time in June, the server was running the 2.4.18-4
kernel. Right now and at the time of the last two hangs, it was using the
2.4.18-10 kernel, so we've also experienced this problem with errata kernels.
Whenever the system hangs this way, it displays this information on VT0:

VFS: dqputduplicate(): Duplicated dquot put without duplicate reference.

The only way to get the system back to a working state at this point is through
a hard reset (the machine does not respond to a three finger salute).

Version-Release number of selected component (if applicable):

How reproducible:
Didn't try

Steps to Reproduce:
Don't know how to reproduce it. User and group quota over nfs should probably be
enabled though to be able to reproduce this, as well as heavy load. We've only
used Red Hat Linux 7.3 machines as nfs clients.

Additional info:

The hard drive used in the server is an IBM DeskStar 60GXP 7200rpm 61.5 GB.
Comment 1 Christian Rose 2002-09-15 13:31:28 EDT
Created attachment 76208 [details]
Contents of /proc/cpuinfo
Comment 2 Christian Rose 2002-09-15 13:32:22 EDT
Created attachment 76209 [details]
Output of /sbin/lspci
Comment 3 Christian Rose 2002-09-15 13:33:04 EDT
Created attachment 76210 [details]
Output of /sbin/lspci -n
Comment 4 Christian Rose 2002-09-15 13:34:49 EDT
Created attachment 76211 [details]
Contents of /etc/fstab
Comment 5 Pete Zaitcev 2002-11-11 16:35:14 EST
I think aranging a serial console and hitting <alt><sysrq>T when
the box hangs may be helpful.
Comment 6 Dennixx 2003-03-07 07:12:33 EST
It seems we have the same problems here. We're running 7.3 with the latest
patches on a Compaq Proliant ML370. Also we experience hangs, and have quite
frequently quota messages:

VFS: dqputduplicate(): Duplicated dquot put without duplicate reference.
VFS: Adding dquot with dq_count 9 to dispose list.

Also, from time to time commands like 'quotaoff -avug' seems to hang in an
uninterruptable state:

root     16900  0.0  0.1  1668  608 pts/1    D    11:59   0:00 quotaoff -avug
Comment 7 Stephen Tweedie 2004-09-10 08:00:56 EDT
Can this be reproduced on a current kernel?
Comment 8 Bugzilla owner 2004-09-30 11:39:55 EDT
Thanks for the bug report. However, Red Hat no longer maintains this version of
the product. Please upgrade to the latest version and open a new bug if the problem

The Fedora Legacy project (http://fedoralegacy.org/) maintains some older releases, 
and if you believe this bug is interesting to them, please report the problem in
the bug tracker at: http://bugzilla.fedora.us/

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