[Dovecot] nfs_flush errors

[Ben Winslow]

Hans Wunsch wrote:
> I'm looking for some help with an nfs error that is filling our logs.  I 
> get a constant stream of these messages:
> 
>  Jul  8 10:47:08 servername dovecot: [ID 107833 mail.error] 
> IMAP(username): nfs_flush_file_handle_cache_dir: rmdir(/var/mail) 
> failed: Device busy

What OS are your dovecot and NFS servers running?  Is /var/mail (or 
whatever it may be symlinked to) an NFS mountpoint?