Ok, all my servers are VM hosted on AWS EC2. I have one NFS server (called "back") that I recently upgraded on Ubuntu 13.04 with the saucy 3.9.2 kernel (I haven't tried 3.9.3 yet). I have 1,n web server(s) (called "front") that runs PHP files that read/write media and cache files on the NFS server. "front" servers actually scales up and down, according to CPU usage.
I can reproduce the bug at will as every time autoscaling adds at least 1 "front" server, I get the bug. So I have to block autoscaling to have only one "front" server in order to work. Actually I can't have only one server in production state, so I switched back on NFSv3. I don't use kerberos. Here is some configuration files : root@back:~# cat /etc/default/nfs-kernel-server RPCNFSDCOUNT=8 RPCNFSDPRIORITY=0 RPCMOUNTDOPTS=--manage-gids NEED_SVCGSSD= RPCSVCGSSDOPTS= RPCNFSDOPTS= root@back:~# cat /etc/exports /srv/exports *(rw,async,fsid=0,no_subtree_check,no_root_squash) /srv/exports/data *(rw,async,no_subtree_check,no_root_squash) root@front:~# cat /etc/fstab LABEL=cloudimg-rootfs / ext4 defaults,noatime 0 0 /dev/xvdf /srv/apps ext4 defaults,noatime 0 0 ## This is the NFS mount ## 10.0.0.254:/data /srv/nfs nfs4 defaults,rsize=32768,wsize=32768,noatime 0 0 ################### /dev/xvdb /mnt auto defaults,noatime,nobootwait,comment=cloudconfig 0 2 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/932687 Title: nfs4_reclaim_locks: unhandled error crashes applications and creates high load To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/932687/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
