fix kill command

aws-experiment-launch/experiment/commander/main.go

@@ -126,9 +126,12 @@ func dictateNode(addr string, command string) int {
 
 	// read response
 	buff := make([]byte, 1024)
-	n, _ := conn.Read(buff)
+	if n, err := conn.Read(buff); err == nil {
 		log.Printf("Receive from %s: %s", addr, buff[:n])
 		return 1
+	} else {
+		return 0
+	}
 }
 
 func handleUploadRequest(w http.ResponseWriter, r *http.Request) {

aws-experiment-launch/experiment/soldier/main.go

@@ -150,7 +150,7 @@ func handleInitCommand(args []string, w *bufio.Writer) {
 
 func handleKillCommand(w *bufio.Writer) {
 	log.Println("Kill command")
-	runCmd("../kill_node.sh")
+	runCmd("./kill_node.sh")
 	logAndReply(w, "Kill command done.")
 }
 

aws-experiment-launch/new-pipeline/userdata-soldier.sh

@@ -5,10 +5,12 @@ curl http://unique-bucket-bin.s3.amazonaws.com/txgen -o txgen
 curl http://unique-bucket-bin.s3.amazonaws.com/soldier -o soldier
 curl http://unique-bucket-bin.s3.amazonaws.com/commander -o commander
 curl http://unique-bucket-bin.s3.amazonaws.com/benchmark -o benchmark
+curl http://unique-bucket-bin.s3.amazonaws.com/kill_node.sh -o kill_node.sh
 chmod +x ./soldier
 chmod +x ./txgen
 chmod +x ./benchmark
 chmod +x ./commander
+chmod +x ./kill_node.sh
 
 # Get My IP
 ip=`curl http://169.254.169.254/latest/meta-data/public-ipv4`