Cyrus questions, lost emails, reconstruct

[Alain Spineux]

On Wed, May 14, 2008 at 11:44 PM, Derrick Seymour <seymourdh at yahoo.com> wrote:
> Blake,
>
> --- Blake Hudson <blake at ispn.net> wrote:
>
>>
>>
>> -------- Original Message  --------
>> Subject: Cyrus questions, lost emails, reconstruct
>> From: Derrick Seymour <seymourdh at yahoo.com>
>> To: info-cyrus at lists.andrew.cmu.edu
>> Date: Wednesday, May 14, 2008 10:20:28 AM
>> > I have been having a few problems as of late.
>> >
>> > First, lost emails.  Well they aren't really lost,
>> i
>> > have located them in the imap mail store under the
>> > users name, kind of hidden i guess you would say.
>> not
>> > sure why that is.
>> >
>> > This happens randomly with incoming emails, maybe
>> one
>> > out of a couple thousand.
>> >
>> > My fix to this was to reconstruct the user box.
>> >
>> ...
>> > while this works, it seems to corrupt the inbox,
>> only
>> > the inbox all other folders stay intack.
>> >
>> ...
>> > sudo -u cyrus /usr/bin/cyrus/bin/reconstruct -i
>> >
>> > and of course this fixes the problem of the mail
>> box
>> > does not exist but i always seems to lose some
>> emails
>> > in the process, usually one or two users at random
>> >
>> > You can probably see a very bad cycle here.
>> >
>> ...
>>
>> Sounds like bad RAM maybe corrupting the cyrus
>> databases... Any other
>> indication of file corruption or system
>> locking/freezing/rebooting
>> (things associated with bad memory) ?
>>
>> In a PC I'd run memtest86, dunno if that option is
>> available to you.
>>
>> -Blake
>> ----
>> Cyrus Home Page: http://cyrusimap.web.cmu.edu/
>> Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki
>> List Archives/Info:
>> http://asg.web.cmu.edu/cyrus/mailing-list.html
>>
>
> No signs of bad memory, the server operates off a
> fiber channel RAID and there are no warnings or
> failures with that either.  There are a couple of
> utilities i can try to test the memory, but i will not
> have an answer on that until this weekend.
>
> Why would reconstruct -i work (minus the few
> disappearing emails) and reconstruct -r user/short
> name corrupt the inbox?

What is the -i for ?
The -r was broken until last last 2.3.12 ! You must use
$ reconstruct -r user/shortname/*
to take care of subdirectories and add -f to discover unknown directories.


Can you give more information about your system ? OS, cyrus version ?
How long did it operate without problems ? Did you change anything ? Even
something you thing is unreleated ?


> I have to assume if the inbox
> didn't get corrupted that the missing emails in
> question would be there.  I have tried to copy emails
> from inbox to a folder in side the usernames folder,
> upon a reconstruct -r those emails are now viewable,
> but the main inbox is still corrupt.

Try to reset the cyrus.index file before to reconstruct, because cyreconstruct
could try to reuse it.
something like
# echo > cyrus.index
or just delete it


Regards

>
> Just a few things I tried if any of this helps.
>
> Thanks again for you help in advance
>
> Derrick
> ----
> Cyrus Home Page: http://cyrusimap.web.cmu.edu/
> Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki
> List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
>



-- 
Alain Spineux
aspineux gmail com
May the sources be with you