NFS Locking and Submission Service Authentication

[Adi Pircalabu]

On 2019-09-26 03:44, Asai via dovecot wrote:
> Greetings,
> 
> We're in the process of upgrading our Dovecot server to new hardware
> and new expanded storage.  We planned on using an NFS share for the
> mail storage, as we're running Postfix / Dovecot on a VM and wanted to
> separate out the mail storage from the VM for backup reasons.
> 
> I read as much as I could find on line regarding configuring Dovecot
> to use NFS, and set it up as best I could, but I'm still running into
> lock errors e.g.:
> 
> Sep 25 10:30:35 triata4 dovecot:
> imap(user at triata.globalchange.media)<75580><enQ/AWSTkQkKCgDu>: Error:
> fcntl(/vmail/triata.globalchange.media/user/dovecot.index.log,
> write-lock, F_SETLKW) locking failed: No locks available
> Sep 25 10:30:35 triata4 dovecot:
> imap(user at triata.globalchange.media)<75580><enQ/AWSTkQkKCgDu>: Error:
> mail_index_wait_lock_fd() failed with file
> /vmail/triata.globalchange.media/user/dovecot.index.log: No locks
> available

How is your NFS export mounted on the client? Can you post the output of 
"egrep nfs /proc/mounts"?

-- 
Adi Pircalabu