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 <[email protected]> wrote: > On Mon, Feb 9, 2015 at 11:58 AM, Christopher Armstrong > <[email protected]> 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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