dovecot - Jul 2011 - Dovecot NFS locking issue

Hi All,

We had 15 imap/pop UW-imap servers behind load balancer and mail storage was NFS
for almost around ~30,000 users on it.  Currently we migrate UW-imap to dovecot
with fcntl  NFS locking.  After migration on dovecot it started error related
locking see following error

Error: fcntl() failed with mbox file /home/w/a/wahmed/.inbox: No locks available
Error: fcntl() failed with mbox file /home/e/d/edurand/.inbox: No locks
available

Look like my NFS locking getting overload or something its (netapps NFS server)

what you suggest to fix this issue ? how uw-imap was working with NFS before ? 

Appreciate your help.

-S

Anyone ?
> From: satish_lx at hotmail.com
> To: dovecot at dovecot.org
> Date: Fri, 8 Jul 2011 17:08:40 +0000
> Subject: [Dovecot] Dovecot NFS locking issue
> 
> 
> Hi All,
> 
> We had 15 imap/pop UW-imap servers behind load balancer and mail storage
was NFS  for almost around ~30,000 users on it.  Currently we migrate UW-imap to
dovecot with fcntl  NFS locking.  After migration on dovecot it started error
related locking see following error
> 
> Error: fcntl() failed with mbox file /home/w/a/wahmed/.inbox: No locks
available
> Error: fcntl() failed with mbox file /home/e/d/edurand/.inbox: No locks
available
> 
> Look like my NFS locking getting overload or something its (netapps NFS
server)
> 
> what you suggest to fix this issue ? how uw-imap was working with NFS
before ?
> 
> Appreciate your help.
> 
> -S
> 
>