Github user ahgittin commented on the pull request:
https://github.com/apache/incubator-brooklyn/pull/705#issuecomment-114335673
According to
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-vpc.html#vpc-only-instance-types
these instance types -- C4, M4, T2 -- are only supported in VPC, not in
"classic". The jclouds PR includes code to prefer instance types available in
both, and so would fix the problem, but the Brooklyn cut only takes the image
half of that PR. So one option would be to copy more of the PR. But I'm still
investigating...
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