Re: Is mon initial members used after the first quorum?

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Our users are running CoreOS with kernel 3.17.2. Our user tested this by setting up the config and then bringing down one of the mons. See https://github.com/deis/deis/issues/2711#issuecomment-66566318 for his testing scenario. 

On Thu, Dec 11, 2014 at 8:16 AM, Joao Eduardo Luis <joao@xxxxxxxxxx> wrote:
On 12/11/2014 02:46 PM, Gregory Farnum wrote:
On Thu, Dec 11, 2014 at 2:21 AM, Joao Eduardo Luis <joao@xxxxxxxxxx> wrote:
On 12/11/2014 04:28 AM, Christopher Armstrong wrote:

If someone could point me to where this fix should go in the code, I'd
actually love to dive in - I've been wanting to contribute back to Ceph,
and this bug has hit us personally so I think it's a good candidate :)


I'm not sure where the bug is or what it may be (see reply to Christian's
email sent a few minutes ago).

I believe the first step to assess what's happening is to reliably reproduce
this.  Ideally in a different environment, or such that it makes it clear
it's not an issue specific to your deployment.

Next, say it's indeed the config file that is being misread: you'd probably
want to look into common/config.{cc,h}.  If it happens to be a bug while
building a monmap, you'd want to look into mon/MonMap.cc and
mon/MonClient.cc.  Being a radosgw issue, you'll probably want to look into
'rgw/*' and/or 'librados/*', but maybe someone else could give you the
pointers for those.

I think the main task now is to reliably reproduce this.  I haven't been
able to from the config you provided, but I may have made some assumptions
that end up negating the whole bug.

It might require some kind of library bug, maybe...? What OS did you
do this on, and what are people running when they see this not work?
-Greg


For what is worth, I tested this against few-days-old master (bc2b9f6bf5fa629e127852720d6ad42ef1276b12) on ubuntu 14.04.

  -Joao


--
Joao Eduardo Luis
Software Engineer | http://ceph.com

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