diff --git a/weasis-launcher/src/main/java/org/weasis/launcher/Singleton.java b/weasis-launcher/src/main/java/org/weasis/launcher/Singleton.java
index e9c4a93a0..1e94588f3 100755
--- a/weasis-launcher/src/main/java/org/weasis/launcher/Singleton.java
+++ b/weasis-launcher/src/main/java/org/weasis/launcher/Singleton.java
@@ -349,9 +349,7 @@ private static String getStreamEncoding(InputStream is) throws IOException {
     }
 
     private Void runSingletonServer() {
-      ExecutorService executor = Executors.newFixedThreadPool(1);
-
-      try {
+      try (ExecutorService executor = Executors.newFixedThreadPool(1)) {
         while (!Thread.currentThread().isInterrupted()) {
           try {
             Socket socket = ss.accept();
@@ -363,8 +361,6 @@ private Void runSingletonServer() {
             LOGGER.error("Error accepting connection", e);
           }
         }
-      } finally {
-        executor.shutdown();
       }
       return null;
     }
diff --git a/weasis-launcher/src/main/java/org/weasis/launcher/Utils.java b/weasis-launcher/src/main/java/org/weasis/launcher/Utils.java
index 0af4c5bd3..56cd90324 100755
--- a/weasis-launcher/src/main/java/org/weasis/launcher/Utils.java
+++ b/weasis-launcher/src/main/java/org/weasis/launcher/Utils.java
@@ -68,10 +68,6 @@ public static boolean hasText(CharSequence str) {
     return false;
   }
 
-  public static boolean hasText(String str) {
-    return hasText((CharSequence) str);
-  }
-
   public static String getWeasisProtocol(String... params) {
     Pattern pattern = Pattern.compile("^weasis(-.*)?://.*?");
     for (String p : params) {