Broken NFS after 9-26
On 9-26 installed update packages on a RH6 file server. The server host multiple network drives to Solaris and other RedHat machines. After the patches were applied, uses are no longer able to use svn or tar commands on the Solaris machines on data which lives the RedHat systems. The Solaries machine also supports a ADA Multi Complier it is no longer able to populate the file and folders in the file browser for the application. These applications were working without issues prior to the 9-26 updates. The problem appears something has changed with NFS. I can provide addition details if someone is having a similar problem. Thanks
Responses
Guru
6863 points
To be clear: is it ONLY the Solaris machines that can no longer use the NFS share? Also - can they mount the share, but are unable to use the share using the SVN application?
I can think of a few things that might have caused this:
* NFSv3 vs NFSv4 negotiation between Red Hat Solaris is not working correctly
* SELinux is blocking access
* IPtables (although not likely)
Check your NFS mount options (between your Red Hat clients and the Solaris clients).
Try disabling (temporarily) SElinux and restarting the NFS server services.
Review files that were modified since the patches were applied (this assumes that the patches were applied after 09-25) - I would focus on files in /etc
find / \( -path /proc -o -path /sys \) -prune -o -newermt '2014-09-25' -print
If SElinux is preventing access, the discussion gets a bit more complicated.
Guru
6863 points
Preface: I don't have actual experience with your specific example and I am simply theorizing based on some other issues I have seen that are similar. Therefore, I recommend you open a case and get the experts on this. But... I think you're on the right track ;-)
In theory RHEL 6 should support exporting of the filesystems to any version (which was not the case before, and actually a bit strange). If I was in your shoes, I would try to force the mount as vers3 on the client side (perhaps Solaris is attempting vers4?).
https://blogs.oracle.com/DanX/entry/mounting_a_linux_nfsv4_filesystem
In my environment we still have not successfully deployed a vers4 global solution. The benefits that are provided have not warranted the effort to fix it, I guess.
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