8:09 a.m.
Ivano,
I am sure we are working on your ticket :-)
have a look at the sum of your tcp send-q bytes (netstat output) and
compare that to tcp_wmem setting (sysctl )
it is possible you may have a client that is not acking the data it
requested...
Michael
From: "Talamo Ivano Giuseppe (PSI)" <Ivano.Talamo(a)psi.ch>
To: "support(a)lists.nfs-ganesha.org" <support(a)lists.nfs-ganesha.org>
Date: 10/08/2018 03:04 PM
Subject: [NFS-Ganesha-Support] unavailability of NFSv3
Hi all,
We are using nfs-ganesha via the IBM Spectrum Scale protocol setup,
currently consisting of 2 servers and around 50 clients.
After a couple of months of smooth run, we started to experience (already
twice in three days) a critical issue that consists in all clients
not being able to mount the filesystem.
When the issue happens this is what we see via rpcinfo on the server:
[root@server ~]# rpcinfo -s
program version(s) netid(s) service owner
100000 2,3,4 local,udp,tcp,udp6,tcp6 portmapper
superuser
100024 1 tcp6,udp6,tcp,udp status 29
100003 4,3 tcp6,tcp,udp6,udp nfs superuser
100005 3,1 tcp6,tcp,udp6,udp mountd superuser
100021 4 tcp6,tcp,udp6,udp nlockmgr superuser
100011 2,1 tcp6,tcp,udp6,udp rquotad superuser
[root@host ~]# rpcinfo -T tcp localhost 100003 3
rpcinfo: RPC: Timed out
The logs are set to EVENT and when the issue starts, ganesha.log gets full
of lines like the following:
2018-10-04 16:40:45 : epoch 0002003d : server :
gpfs.ganesha.nfsd-40452[State_Async] nlm_send_async :NLM :MAJ :Cannot
create NLM async tcp connection to client ::ffff:129.129.117.65
2018-10-04 16:40:45 : epoch 0002003d : server:
gpfs.ganesha.nfsd-40452[State_Async] nlm4_send_grant_msg :NLM :MAJ
:GRANTED_MSG RPC call failed with return code -1. Removing the blocking
lock
The nfs-ganesha version is 2.5.3 even if that’s the ibm version so I am
not sure what are the changes.
I was wondering if someone on the mailing list had an idea of what
direction to take to investigate this further.
Thanks,
Ivano
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