<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div>I launched a cluster of cc1.4xlarge spot instances today using StarCluster. A placement group was successfully created, however only the Master node actually joined the new placement group. All child nodes were not in any placement group at all. I got no error of any sort, but this obviously defeats the purpose of having cc1 instances in a cluster if they are not in the same placement group. I tried the same thing with on demand instances and it worked, placing the master as well as the child nodes all in the StarCluster generated placement group as expected. When I launch a spot instance manually I am able to specify a placement group, so it seems that the functionality is available on Amazon's end, is there something I'm missing?</div><div><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: 'times new
roman', 'new york', times, serif; background-color: transparent; font-style: normal;">Thanks,</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;">Steve</div></div></body></html>