Public bug reported: On Mon, Jun 29, 2009 at 04:29:25PM -0700, Keith Jackson wrote: Hi, I've run into a strange problem, and I'm not sure where to ask about it. It appears to be kernel related, so hopefully someone here can shed some light on it for me. I have a over a dozen ubuntu 9 server machines that share an NFS filesystem served up on a FreeBSD machine. We recently upgraded the FreeBSD box to FreeBSD 7.2. The ubuntu machines are running the standard 2.6.28-11-server kernel.
At this point, we started having problems with NFS on all of the ubuntu machines. They would come up, mount the NFS shares and then 5-10 minutes later NFS would be hung. I ran wireshark on one of them, while doing "ls -l ~username". When NFS was working everything looked fine. Once it hung, I would see the normal YP MATCH RPC call looking for the entry for "username". The NIS server would return the password entry for "username" as I'd expect. When things were working, I'd then see the standard NFS traffic. When NFS was hosed, the YP MATCH reply would be the last net traffic I would see to the NFS server. Nothing NFS related would ever happen. An strace would show that the ls was hung in a stat64 call. A reboot of the system would cause things to start working for a while, but 5-10 minutes later NFS would hang. I eventually updated to a 2.6.30 kernel from: http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.30/ This has fixed the problem. Any thoughts on what the problem might be, or how I might go about debugging it better? ** Affects: ubuntu Importance: Undecided Status: New -- nfs client hangs https://bugs.launchpad.net/bugs/394413 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
