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.
No, it happens only on production environment with high load. I think
that it's related to multiple concurrent writes by our software, eZ
Publish.
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https://bugs.launchpad.net/bugs/932687
I'm running Ubuntu 13.04 for the NFS Server and Ubuntu 12.04.2 on NFS
clients, with the latest saucy kernel 3.9.2 for both clients server.
I'm still having the issue :
2013-05-14 20:13:54.0 front Warnkernel front kernel: [16314892.359664]
NFS: nfs4_reclaim_open_state: Lock reclaim
