<div dir="ltr">Hello Florent,<div><br></div><div>How did you proceed with the upgrade? Did you follow the recommended steps guide to upgrade ceph? (mons first, then OSDs, then MDS)</div><div>Did you interrupt dovecot before upgrading the MDS specially? Did you remount the filesystem? Did you upgrade the ceph client too?</div><div><br></div><div>Give people the complete scene and someone might be able to help you. Ask on ceph-users list too.</div><div><br></div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><br></div>Regards,<div><br></div><div>Webert Lima</div><div>DevOps Engineer at MAV Tecnologia</div><div><b>Belo Horizonte - Brasil</b></div><div><b>IRC NICK - WebertRLZ</b></div></div></div></div></div></div>
<br><div class="gmail_quote">On Thu, Jan 18, 2018 at 8:41 AM, Florent B <span dir="ltr"><<a href="mailto:florent@coppint.com" target="_blank">florent@coppint.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi list,<br>
<br>
I'm sorry to come back with my problem. I'm pretty sure it's not<br>
dovecot-related, but can someone help me to bring some debug information<br>
to Ceph developers ?<br>
<br>
For example, how writes are handled in Dovecot, and what kind of<br>
corruption it is according to error messages ?<br>
<div class="HOEnZb"><div class="h5"><br>
<br>
On 13/12/2017 16:19, Florent B wrote:<br>
> Hi,<br>
><br>
> I use Dovecot (last released version), 2 backends and 1 director, each<br>
> user account handled by a single assigned backend.<br>
><br>
> I use CephFS filesystem for messages (FUSE client).<br>
><br>
> Since Ceph upgrade from Kraken to Luminous, I have a lot of erreurs<br>
> "Error: Corrupted dbox file" on a single (large) mail account.<br>
><br>
> I know the problem seems to come from Ceph, but maybe someone here can<br>
> help me diagnose the situation.<br>
><br>
> The error is exactly : EOF reading msg header (got 0/30 bytes)<br>
><br>
> Dovecot backends are configured like this :<br>
><br>
> mmap_disable = yes<br>
> mail_fsync = optimized<br>
> mail_nfs_storage = no<br>
> mail_nfs_index = no<br>
> mdbox_rotate_size = 12M<br>
><br>
> CephFS supports file locking, and 2 backends never write the same file<br>
> because each user is assigned to a backend.<br>
><br>
> Did you ever see this problem with others FS maybe ?<br>
><br>
> It seems problem disappeared when I disable pagecache for the Fuse mount.<br>
><br>
> Thank you for your help.<br>
><br>
><br>
<br>
</div></div></blockquote></div><br></div>