Corrupted index cache after migrating from maildir to mdbox

[Tim]

On 21.11.2014 14:04, Tim wrote:
> On 21.11.2014 11:58, Toni Mattila wrote:
>> 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.
>>
> well, I don't have the maildir files anymore or they are way out of
> date. I can try to mirror the directory structure with doveadm to create
> another mdbox instance. maybe this will it also fix.
I successfully mirrored all mailboxes with dsync, but this didn't fix
anything. My mailclients are still complaining about the virtual size.
or broken index cache files. Any thoughts here? Timo maybe?

>> 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 <tim at 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.