Greg,
Thanks for confirming they're unrelated - that'll save me from going down the wrong path in debugging.
I'll see what I can do about getting more info from the MDS - I'll relay this to our user.
Chris
On Mon, Feb 9, 2015 at 1:51 PM, Gregory Farnum <greg@xxxxxxxxxxx> wrote:
On Mon, Feb 9, 2015 at 11:58 AM, Christopher Armstrong
<chris@xxxxxxxxxxxx> wrote:
> Hi folks,
>
> One of our users is seeing machine crashes almost daily. He's using Ceph
> v0.87 giant, and is seeing this crash:
> https://gist.githubusercontent.com/ianblenke/b74e5aa5547130ebc0fb/raw/c3eeab076310d149443fd6118113b9d94f176303/gistfile1.txt
>
> It seems easy to trigger this by rsyncing to the CephFS mount. We're using
> the kernel client here, so I'm wondering if it's related to this timestamp
> bug:
> http://lists.ceph.com/pipermail/ceph-users-ceph.com/2015-January/045838.html
These are definitely not related.
> Does anyone have any insight into the crash? Some confirmation that it's
> related to system clocks/timestamps would be helpful.
>
> Another note is that we're using HVM virtualization on EC2. Not sure if
> people have run into this before or not.
Zheng might have some idea about these, but I'm guessing there's a
code issue and some deadlock with file capabilities.
If you can look at the MDS' admin socket and dump the ops in flight
and the session info that might be helpful too. ("ceph daemon mds.a
dump_ops_in_flight", etc)
-Greg
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