On Sat, Aug 27, 2011 at 09:22:53PM +0200, Rüdiger Meier wrote: > I've got an annoying problem with my nfs4 clients. > Lately I see many processes hanging in state D when reading from nfs > mount. Sometimes they can be killed sometimes not. Is this still happening? > This occurs mostly whith shell scripts started by cron. > > For example on one machine there is a file where suddenly all reads on > it are hanging, ls -ls still works: > > rwxr-xr-x 1 tk users 128 2010-09-08 15:54 /home/tk/usr/local/scripts/plain_ALLMAJOR.sh > > As you see it's an old script, not modified since long time. It was > running a few times per day since months. > > Now this is the processlist: > > tk 8829 0.0 0.0 11372 800 ? Ds Aug25 0:00 /bin/sh -c ~/usr/local/scripts/plain_ALLMAJOR.sh > tk 8830 0.0 0.0 11372 824 ? Ds Aug25 0:00 /bin/sh -c ~/usr/local/scripts/plain_ALLMAJOR.sh > tk 18864 0.0 0.0 11372 844 ? Ds Aug26 0:00 /bin/sh -c ~/usr/local/scripts/plain_ALLMAJOR.sh > tk 18865 0.0 0.0 11372 860 ? Ds Aug26 0:00 /bin/sh -c ~/usr/local/scripts/plain_ALLMAJOR.sh > rudi 23745 0.0 0.0 10300 748 pts/20 D 20:39 0:00 file /home/tk/usr/local/scripts/plain_ALLMAJOR.sh > rudi 24361 0.0 0.0 10300 748 pts/20 D 20:40 0:00 file /home/tk/usr/local/scripts/plain_ALLMAJOR.sh > root 30417 0.0 0.0 10056 472 ? D Aug24 0:00 less /home/tk/usr/local/scripts/plain_ALLMAJOR.sh > rudi 30569 0.0 0.0 10064 1128 pts/1 D+ 20:41 0:00 less /home/tk/usr/local/scripts/plain_ALLMAJOR.sh > > The /bin/sh processes are hanging forever in state "Ds" but can be killed. > The less and file commands can't be killed. > On other clients I can read that file without probs. > > The logs on server and clients don't tell me anything. > What can I do to find out what's the problem? Running wireshark and watching the network traffic may sometimes give an idea whether the client or server is to blame. > BTW each hanging process increases the load by 1 but the affected machines > are still quite usable even with a load of 800 on a single core CPU! > > > here my specs: > 2.6.37.6-0.7-desktop > openSUSE 11.4 (x86_64) On both client and server? --b. -- 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
