Op maandag 13-04-2009 om 12:12 uur [tijdzone -0400], schreef Chuck Lever: > On Apr 13, 2009, at 11:24 AM, Daniel Stickney wrote: > > Hi all, > > > > I am investigating some NFS mount hangs that we have started to see > > over the past month on some of our servers. The behavior is that the > > client mount hangs and needs to be manually unmounted (forcefully > > with 'umount -f') and remounted to make it work. There are about 85 > > clients mounting a partition over NFS. About 50 of the clients are > > running Fedora Core 3 with kernel 2.6.11-1.27_FC3smp. Not one of > > these 50 has ever had this mount hang. The other 35 are CentOS 5.2 > > with kernel 2.6.27 which was compiled from source. The mount hangs > > are inconsistent and so far I don't know how to trigger them on > > demand. The timing of the hangs as noted by the timestamp in /var/ > > log/messages varies. Not all of the 35 CentOS clients have their > > mounts hang at the same time, and the NFS server continues operating > > apparently normally for all other clients. Normally maybe 5 clients > > have a mount hang per week, on different days, mostly different > > times. Now and then we might see a cluster of a few clien > > ts have their mounts hang at the same exact time, but this is not > > consistent. In /var/log/messages we see > > > > Apr 12 02:04:12 worker120 kernel: nfs: server broker101 not > > responding, still trying > > Are these NFS/UDP or NFS/TCP mounts? > > If you use a different kernel (say, 2.6.26) on the CentOS systems, do > the hangs go away? > Hi Chuck, In my case NFS/TCP. I have tried most 2.6.2x kernels, it may take a week or longer for them to hang, but hang they do :( have been fighting with this one since at least 2.6.24, and probably 2.6.22 The reader that was hanging last week, is running 2.6.26 Rudy -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
