dovecot - Jun 2006 - Dovecot+NFS: Copying messages causes failures (possible SIGABRT)

Environment:

Dovecot 1.0beta8
Host: 64 bit Red Hat AS4 Linux (2.6.9-34.0.1)
Disks: NFS netapp

In the case below, the two connections were going through two separate servers
sharing disks via an NFS NetApp.

Here is the sequence of operations:

1. Open a connection to a folder (say mail/Trash)
2. Open a connection to another folder (say Inbox)
3. Move messages from Inbox to Trash using this sequence on Inbox:

   uid copy #,# "mail/Trash"
   uid store #,# +flags (\Deleted)
   check
   expunge

4. Next, access open connection to Trash:

   noop (completes OK, but does not see new messages)
...wait a few seconds...
   noop (connection drops...no response)

Attempt to reconnect: mailbox locked. Will override in 270 seconds.

The dovecot logs contain the following for the exact time when the connection
drops:

dovecot: IMAP(tkay): file mail-index-sync-update.c: line 686
(mail_index_sync_update_index): assertion failed: (view->hdr.messages_count
== map->hdr.messages_count)

I cannot correlate this to the user/folder, but this message is usually nearby:

child 22915 (imap) killed with signal 6
  
--
Anthony Kay
University Computing Center
(541) 346-1719
GPG Fingerprint: B0DB D46A 60AF FAE7 A94A  5075 0CB4 4D88 9F4F 7F09

  Perfection uncanned 
Like a beautiful redhead
 Fresh from her trailer

        from Spam-Ku : Tranquil Reflections on Luncheon Loaf
             by John Cho

On Fri, 2006-06-16 at 12:04 -0700, Tony Kay wrote:
> Environment:
> 
> Dovecot 1.0beta8
> Host: 64 bit Red Hat AS4 Linux (2.6.9-34.0.1)
> Disks: NFS netapp
> 
> In the case below, the two connections were going through two separate
servers sharing disks via an NFS NetApp.
Have you checked: http://wiki.dovecot.org/NFS

To make this configuration work perfectly you'll need to have a
correctly working Linux kernel (I don't know if RH's 2.6.9 is good
enough) and attribute cache disabled.

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