Bug 167896

Summary: Unable to unmount a local file system exported by NFS
Product: Red Hat Enterprise Linux 3 Reporter: Bruno Cornec <bruno_cornec>
Component: kernelAssignee: Steve Dickson <steved>
Status: CLOSED DUPLICATE QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 3.0CC: petrides
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2005-09-09 20:29:32 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Description Bruno Cornec 2005-09-09 09:23:50 UTC
From Bugzilla Helper:
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Description of problem:
When trying to unmount a file system which is exported by NFS to a large number of heterogeneous clients, the unmounting is denied:

umount: /d1: device is busy

/var/log/messages contains the following traces at the time of the umount:

Aug 31 08:24:36 ganlxsr3 rpc.statd[921]: Received erroneous SM_UNMON
request from ganlxsr3 for 193.x.y.z
Aug 31 08:24:36 ganlxsr3 kernel: lockd: couldn't shutdown host module!

No processs seem to be using that filesystem at the moment we tried to unmount it:

# lsof | grep d1

Gives nothing.

The problem we also see related to that issue, is that the [lockd] daemon which is now running correctly wasn't there in the list of process

# ps auxww | grep lockd
Gives nothing

Version-Release number of selected component (if applicable):
kernel 2.4.21-32.0.1.ELsmp

How reproducible:

Steps to Reproduce:
1. Wait a sufficient amount of time (some days/weeks)
2. unexport /d1
3. try to umount /d1
4. buzy message as above

Actual Results:  file system remains mounted

Expected Results:  file system should have been unmounted without error

Additional info:

Comment 1 Bruno Cornec 2005-09-09 16:39:06 UTC

*** This bug has been marked as a duplicate of 167636 ***

Comment 2 Ernie Petrides 2005-09-09 20:22:29 UTC
Reopening/reclosing to fix assignee.

Comment 3 Ernie Petrides 2005-09-09 20:29:32 UTC
Apparently an accidental duplicate report.

*** This bug has been marked as a duplicate of 167636 ***