ignore shutting-down

Author: nchammas

ec2/spark_ec2.py

@@ -627,7 +627,7 @@ def get_instances(group_names):
         reservations = conn.get_all_reservations(
             filters={"instance.group-name": group_names})
         instances = itertools.chain.from_iterable(r.instances for r in reservations)
-        return [i for i in instances if i.state != "terminated"]
+        return [i for i in instances if i.state not in ["shutting-down", "terminated"]]
 
     master_instances = get_instances([cluster_name + "-master"])
     slave_instances = get_instances([cluster_name + "-slaves"])