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Created attachment 573712 [details] test c program Description of problem: client A: touch blah ln -s blah blahlink client B: open("blahlink", O_RDONLY|O_CREAT, 0666) = -1 EEXIST (File exists) $ ls -l blahlink lrwxrwxrwx. 1 orion cora 4 Mar 29 09:30 blahlink -> blah open("blahlink", O_RDONLY|O_CREAT, 0666) = 3 Removing and recreating the link on client A restores the problem. earth:/export/home/orion on /home/orion type nfs (rw,noatime,intr,rsize=32768,wsize=32768,actimeo=1,sloppy,vers=4,addr=10.10.10.1,clientaddr=10.10.41.10) I thought this might be the same as bug 739797, but this kernel should have the fix for that (and in fact it does fix the vim issue). Version-Release number of selected component (if applicable): 2.6.32-250.el6.x86_64 How reproducible: Everytime I can also reproduce with 2.6.42.9-2.fc15.x86_64 but not with 3.3.0-4.fc16.x86_64.
Scratch that. I can reproduce with 3.3.0-4.fc16.x86_64. You need to make sure that the link is recreated after an initial access/mount to test. Also present in 3.4.0-0.rc0.git1.2.fc18.x86_64. I can't reproduce with 2.6.18-308.1.1.el5.
According to the discussion on linux-nfs http://thread.gmane.org/gmane.linux.nfs/48319 this is a server bug, and apparently is still present in the latest upstream kernel.
Created attachment 575818 [details] proposed patch This was the proposed patch on the list. I applied to kernel-2.6.32-220.7.1.el6.x86_64 and it appears to have fixed the issue.
Since RHEL 6.3 External Beta has begun, and this bug remains unresolved, it has been rejected as it is not proposed as exception or blocker. Red Hat invites you to ask your support representative to propose this request, if appropriate and relevant, in the next release of Red Hat Enterprise Linux.
Yes, the backport looks right. Thanks!
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux release for currently deployed products. This request is not yet committed for inclusion in a release.
Patch(es) available on kernel-2.6.32-298.el6
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHSA-2013-0496.html