dovecot - Sep 2003 - Locking foolishness

I'm working on getting Dovecot set up on my school's mailserver, as an
IMAP
and POP server.  Everything is going well, move over to maildir went well,
and all that...

The catch:
When I coverted from mbox to maildir (as part of this whole process), I put
the Maildir folders under user home dirs -- and the home dirs are mounted
via NFS from a server.  This is for reasons of space as well as simply
seeming to make sense.

Now I get errors in my mail.log which read:
imap-login: Sep 16 00:16:24 dovecot:Info: Login: marlier [209.6.159.188]
imap(marlier): Sep 16 00:16:28 dovecot:Error: file_wait_lock() failed with
index file 
/Network/Servers/network.uphamscornercs.net/Users/marlier/Maildir/.INBOX/.im
ap.index: Invalid argument


It looks to me like it's a file locking problem...any thoughts on how to get
around it?  I've already tried the dotlock mechanism alone...without
success...

More information available upon request...

- Ian

On Tuesday, Sep 16, 2003, at 07:22 Europe/Helsinki, Ian Marlier wrote:
> When I coverted from mbox to maildir (as part of this whole process),  
> I put
> the Maildir folders under user home dirs -- and the home dirs are  
> mounted
> via NFS from a server.  This is for reasons of space as well as simply
> seeming to make sense.
>
> Now I get errors in my mail.log which read:
> imap-login: Sep 16 00:16:24 dovecot:Info: Login: marlier  
> [209.6.159.188]
> imap(marlier): Sep 16 00:16:28 dovecot:Error: file_wait_lock() failed  
> with
> index file
> /Network/Servers/network.uphamscornercs.net/Users/marlier/Maildir/ 
> .INBOX/.im
> ap.index: Invalid argument
1) Index files can't be accessed safely via NFS. You can disable them  
by appending :INDEX=MEMORY in default_mail_env.

2) .subscriptions file isn't NFS safe yet. It has been fixed in CVS.

3) .customflags file isn't NFS safe yet. It hasn't been fixed in CVS.

You could use lockd to enable fcntl() locks which would make 2 and 3  
work, but many NFS client implementations don't really support lockd..