Hi,

I think your issue is due to your corrupted maildir sizes in filenames so you got corrupted index that way to your mdbox. That is not something you can easily fix afterwords other than fixing the maildir first and then migrate to mdbox.

Best Regards,
Toni

On 21.11.2014 11:59, Tim wrote:
Hi Timo,
sorry for the late reply, missed this mail.
On 15.10.2014 05:05, Timo Sirainen wrote:
On 27 Sep 2014, at 17:48, Tim <t...@bastelfreak.de> wrote:

unfortunately I'm getting the following two kinds of error messages for
all mail boxes in my mail.log:

Error: Corrupted index cache file
/home/vmail/%domain/%user/mdbox/mailboxes/%maildir/dbox-Mails/dovecot.index.cache:
Broken virtual size for mail UID 2564

and:

Error: read(/home/vmail/%domain/%user/mdbox/storage/m.108
): FETCH BODY[] for mailbox %maildir UID 2564 got too little data: 2417
vs 6319
If that happens to all the mails, something went wrong. Did you maybe use zlib 
plugin while writing the messages (compressed), but now you're trying to read 
the mails without zlib plugin?

the migration from maildir to mdbox is a few weeks in the past so I
don't remember correctly. IMHO I migrated from maildir with disabled
zlib to mdbox. with mdbox, zlib was active the hole time and it is still
active. Here is my doveconf -n output: http://p.bastelfreak.de/l2wq/ .
Do you need anything else for debugging?

The error messages may be somewhat confusing. The problem isn't 
dovecot.index.cache file, but that the message sizes in the m.* files don't 
match the contents. There's no easy way to fix those, because they should just 
about never be wrong.

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