do not allow user to start 0-slave cluster

holdenk · Mar 3, 2014 · 9a71769 · 9a71769
1 parent 24a7c79
commit 9a71769
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/ec2/spark_ec2.py b/ec2/spark_ec2.py
@@ -678,6 +678,9 @@ def real_main():
     opts.zone = random.choice(conn.get_all_zones()).name
 
   if action == "launch":
+    if opts.slaves <= 0:
+      print "You have to start at least 1 slave"
+      sys.exit(1)
     if opts.resume:
       (master_nodes, slave_nodes) = get_existing_cluster(
           conn, opts, cluster_name)