Red Hat Bugzilla – Bug 119428
(NFSD)nfs mounts hang forever
Last modified: 2014-01-21 17:49:21 EST
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Description of problem:
nfs mounts from this kernel's nfsd just hang forever.
/ 126.96.36.199/16(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
[... still hung forever..., no message at all on server log...]
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. attempt to mount
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
Talk to the nfs-utils maintainer upstream. Parsing of the exports file
is kinda dicey.
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.
this still a problem with the 2.6.9 kernel ?
No problem now.