Bug 119428

Summary: (NFSD)nfs mounts hang forever
Product: [Fedora] Fedora Reporter: Neal Becker <ndbecker2>
Component: kernelAssignee: Steve Dickson <steved>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: high Docs Contact:
Priority: medium    
Version: 2CC: davej, steved
Target Milestone: ---   
Target Release: ---   
Hardware: athlon   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2004-12-07 16:11:03 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 114961, 123268, 136451    

Description Neal Becker 2004-03-30 13:09:46 UTC
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Description of problem:
nfs mounts from this kernel's nfsd just hang forever.
cat /etc/exports
/  139.85.0.0/16(rw,async) *.hns.com(rw,async) 10.100.20.0/16(rw,async) *.adg.labs.md.hnsnet(rw,async) 10.100.21.0/16(rw,async)

No error messages, just hang.
In fact, no message at all, not even normal "mount request...".

Here is an example, I'm telnetting to a client which should automount my home (I've been using this same setup forever, there is nothing new except the nfs server kernel):
Red Hat Enterprise Linux WS release 3 (Taroon Update 1)
Kernel 2.4.21-9.0.1.ELsmp on an i686
login: nbecker
Password:

[... still hung forever..., no message at all on server log...]

Version-Release number of selected component (if applicable):
2.6.4-1.281

How reproducible:
Always

Steps to Reproduce:
1. attempt to mount
2.
3.
    

Additional info:

Comment 1 Neal Becker 2004-03-30 19:48:55 UTC
Workaround: 
 
If I remove all overlapping entries from /etc/exports the problem is 
gone.  That is, in my previous exports, I had both IP address ranges 
and names that mapped to the same IPs.  I got rid of the names and 
kept only IP ranges, and now it's OK. 
 
IMHO, this fix is totally unacceptable.  It should work with this 
workaround. 
 

Comment 2 Seth Vidal 2004-05-07 16:16:52 UTC
Talk to the nfs-utils maintainer upstream. Parsing of the exports file
is kinda dicey.


Comment 3 Steve Dickson 2004-11-29 11:05:48 UTC
would it be possible to post a AltSysRq-t backtrace of all the
the processes which would help tell me where the nfsds are hanging. 

Comment 4 Dave Jones 2004-12-07 06:33:56 UTC
this still a problem with the 2.6.9 kernel ?

Comment 5 Neal Becker 2004-12-07 12:24:00 UTC
No problem now.