On 2/6/2017 1:46 μμ, Nikolaos Milas wrote:
After a bit of search, I found the associated reports:
https://bugs.centos.org/view.php?id=13351
https://bugzilla.redhat.com/show_bug.cgi?id=1454876
No solution yet, but -as a workaround- it seems that -at least- nfs
problems are indeed solved with downgrading.
I have been working fine with CentOS 7.3, since I downgraded to
rpcbind-0.2.0-38.el7.x86_64.
Today, I decided to upgrade to 7.4 (which, among several hundred
updates, includes rpcbind-0.2.0-42.el7.x86_64); after that I have
started having similar NFS issues again: NFS communication hungs. In
/var/log/messages:
-----------------------------------------------------------------------------------------
...
Sep 22 11:03:21 hesperia1 kernel: RPC: Registered named UNIX socket
transport module.
Sep 22 11:03:21 hesperia1 kernel: RPC: Registered udp transport module.
Sep 22 11:03:21 hesperia1 kernel: RPC: Registered tcp transport module.
Sep 22 11:03:21 hesperia1 kernel: RPC: Registered tcp NFSv4.1
backchannel transport module.
Sep 22 11:03:21 hesperia1 systemd-udevd: starting version 219
Sep 22 11:03:21 hesperia1 systemd: Started Configure read-only root support.
Sep 22 11:03:21 hesperia1 kernel: Installing knfsd (copyright (C) 1996
okir@xxxxxxxxxxxx).
Sep 22 11:03:21 hesperia1 systemd: Mounted NFSD configuration filesystem.
...
Sep 22 11:03:27 hesperia1 systemd: Mounting /mnt/dd2500-1...
Sep 22 11:03:27 hesperia1 systemd: Starting Notify NFS peers of a restart...
Sep 22 11:03:27 hesperia1 sm-notify[948]: Version 1.3.0 starting
Sep 22 11:03:27 hesperia1 systemd: Started Notify NFS peers of a restart.
Sep 22 11:03:27 hesperia1 systemd: Started OpenSSH server daemon.
Sep 22 11:03:27 hesperia1 kernel: FS-Cache: Loaded
Sep 22 11:03:27 hesperia1 kernel: FS-Cache: Netfs 'nfs' registered for
caching
Sep 22 11:03:27 hesperia1 systemd: Mounted /mnt/dd2500-1.
Sep 22 11:03:27 hesperia1 systemd: Reached target Remote File Systems.
Sep 22 11:03:27 hesperia1 systemd: Starting Remote File Systems.
...
Sep 22 11:11:16 hesperia1 kernel: nfs: server 10.201.40.34 not
responding, still trying
...
Sep 22 11:20:44 hesperia1 kernel: nfs: server 10.201.40.34 not
responding, still trying
...
-----------------------------------------------------------------------------------------
I tried downgrading to rpcbind-0.2.0-38.el7.x86_64 but this time it
didn't help.
I mount either directly:
mount -vv -o auto,noatime,nolock,bg,nfsvers=3,intr,tcp,actimeo=1800
-t nfs 10.201.40.34:/data/col1/hesperia-mount /hesperiamount2
or through /etc/fstab:
10.201.40.34:/data/col1/hesperia-mount /hesperiamount2 nfs
auto,noatime,nolock,bg,nfsvers=3,intr,tcp,actimeo=1800 0
The box may even hung during reboot, which has never happened in the past.
It needs a hard reboot (via VM admin console) to boot again.
I have confirmed the above behavior multiple times.
Please advise me on how to resolve this situation. We are very much
dependent on NFS mounts.
Is it a known bug? (As far as I could search, I didn't came up with
something.)
The earlier bug report appears resolved:
https://bugzilla.redhat.com/show_bug.cgi?id=1454876
Can I safely/easily revert to 7.3?
Thanks in advance,
Nick
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