From: Rudy Gevaert (no email)
Date: Wed Sep 05 2007 - 02:19:21 EDT
Bron Gondwana wrote:
> On Tue, Sep 04, 2007 at 02:28:35PM -0400, Wesley Craig wrote:
>> Just to be clear, that's cyr_expire dying, not being killed by
>> master. Signal 11 is SIGSEGV, which is to say a segmentation
>> violation, i.e., a bug in cyr_expire. Personally, I've seen this
>> error on a lot of systems. The mailbox after the last one you listed
>> probably has a corrupt meta file -- indicative of a bug in another
>> process. Reconstruct will typically correct these sorts of problems.
>
> http://cyrus.brong.fastmail.fm/patches/cyrus-expire-prefix-2.3.9.diff
>
> Basically, the cyrus.cache file has a bunch of field length data in it,
> and cyr_expire walks through that. If you have a corrupt cyrus.cache
> then it will calculate the next memory address outside the mmap'ed
> file and *BOOM* - segfault.
>
> The patch above does range checking on the next calculated address each
> time, and if it's outside the range, it logs the mailbox and return
> IOERROR. You still need to reconstruct, but at least cyr_expire keeps
> running and you have the exact mailbox with the error in your logs
> (otherwise you only have the last mailbox with messages expunged, which
> gives a range to check but not an exact target)
>
> (it also adds a -p "mailbox prefix" option to allow you to expire just
> a small range of mailboxes for easy finding of your bogus folder again)
Thank you for the responds. I'll try to run reconstruct on the mailbox.
And I hope to upgrade to 2.3.9 soon, I'm already running a small
instance with a couple of your patches Bron. But I still got 6 to
upgrade and those are rather hudge.
Rudy
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Rudy Gevaert tel:+32 9 264 4734 Directie ICT, afd. Infrastructuur ICT Department, Infrastructure office Groep Systemen Systems group Universiteit Gent Ghent University Krijgslaan 281, gebouw S9, 9000 Gent, Belgie www.UGent.be -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- ---- 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
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