You've hit quite the edge case! Basically, there were instances returned from the create call that were not returned from the describe call. Eventual consistency, in other words.

https://github.com/jclouds/jclouds/blob/master/apis/ec2/src/main/java/org/jclouds/ec2/compute/strategy/EC2CreateNodesInGroupThenAddToSet.java#L163

On Mon, Oct 27, 2014 at 6:00 AM, Yaron Rosenbaum <yaron.rosenbaum@gmail.com> wrote:
jclouds.compute - << not api visible instances([{region=us-east-1, name=sir-02ggqbxp}])



(Y)