dovecot - Jan 2012 - error bad file number with compressed mbox files

Hello,

can dsync convert from compressed mbox to compressed mdbox format?

When I use compressed mbox files, either with gzip or with bzip2, I can 
read the mails as usual, but I find the following errors in dovecots log 
file:

imap(userxy): Error: nfs_flush_fcntl: 
fcntl(/home/hrz/userxy/Mail/mymbox.gz, F_RDLCK) failed: Bad file number
imap(userxy): Error: nfs_flush_fcntl: 
fcntl(/home/hrz/userxy/Mail/mymbox.bz2, F_RDLCK) failed: Bad file number

These errors also appear when I use dsync to convert the compressed 
mbox to mdbox format on a second dovecot server:

/opt/local/bin/dsync -v -u userxy backup 
mdbox:/sanpool/mail/home/hrz/userxy/mdbox
dsync(userxy): Error: nfs_flush_fcntl: 
fcntl(/home/hrz/userxy/Mail/mymbox.gz, F_RDLCK) failed: Bad file number

But now dovecot does not find the mails in the folder mymbox.gz on the 
second dovecot server in mdbox format!

The relevant part of the dovcot configuration is:

# 2.0.16: /opt/local/etc/dovecot/dovecot.conf
# OS: SunOS 5.10 sun4v
mail_fsync = always
mail_location = mbox:~/Mail:INBOX=/var/mail/%u
mail_nfs_index = yes
mail_nfs_storage = yes
mail_plugins = mail_log notify zlib
mmap_disable = yes

Thank you,
-- 
J?rgen Obermann
Hochschulrechenzentrum der
Justus-Liebig-Universit?t Gie?en
Heinrich-Buff-Ring 44
Tel. 0641-9913054

On Mon, 2012-01-02 at 15:33 +0100, J?rgen Obermann wrote:
> can dsync convert from compressed mbox to compressed mdbox format?
> 
> When I use compressed mbox files, either with gzip or with bzip2, I can 
> read the mails as usual, but I find the following errors in dovecots log 
> file:
> 
> imap(userxy): Error: nfs_flush_fcntl: 
> fcntl(/home/hrz/userxy/Mail/mymbox.gz, F_RDLCK) failed: Bad file number
> imap(userxy): Error: nfs_flush_fcntl: 
> fcntl(/home/hrz/userxy/Mail/mymbox.bz2, F_RDLCK) failed: Bad file number
This happens because of mail_nfs_* settings. You can either ignore those
errors, or disable the settings. Those settings are useful only if you
attempt to access the same mailbox from multiple servers at the same
time, which is randomly going to fail even with those settings, so they
aren't hugely useful.