Comment 58 for bug 708920

Robert,

Can you confirm what CPU is running on that node? The Librato guys have apparently narrowed it down to only happening on the Intel E5507. See this blog post for more:

https://silverline.librato.com/blog/main/EC2_Users_Should_be_Cautious_When_Booting_Ubuntu_10_04_AMIs

I checked one of our problem nodes that's still up and sure enough, it's running on an E5507. We have another node using the same CPU but with the same test kernel that was posted by Stefan above. So far, it looks ok, but we haven't put too much load on it yet and it's only been about 4 days.