Comment 39 for bug 1746806

I am having the same issue. I tested the C5 instance when it first came out and it would randomly lock up at 100% CPU. I contacted AWS support and they could not figure it out. They sent a message to the devs to see if they could. So I switched back to c4 instances. I decided to try it again yesterday and it working fine until this morning when it randomly decided to lock up at 100% CPU again. I looked at all the logs and nothing is showing me what could be causing issues. I tried multiple kernels and for me, they all seem to do it. Anyone figure this out? I would really like to use the C5.