src/java.desktop/share/classes/sun/awt/AWTAutoShutdown.java

@@ -32,11 +32,10 @@
 import java.util.IdentityHashMap;
 import java.util.Map;
 import java.util.Set;
 
 import sun.awt.util.ThreadGroupUtils;
-import sun.misc.ManagedLocalsThread;
 import sun.util.logging.PlatformLogger;
 
 /**
  * This class is to let AWT shutdown automatically when a user is done
  * with AWT. It tracks AWT state using the following parameters:

@@ -335,12 +334,12 @@
      * the new blocker thread starts.
      */
     private void activateBlockerThread() {
         AccessController.doPrivileged((PrivilegedAction<Thread>) () -> {
             String name = "AWT-Shutdown";
-            Thread thread = new ManagedLocalsThread(
-                    ThreadGroupUtils.getRootThreadGroup(), this, name);
+            Thread thread = new Thread(
+                   ThreadGroupUtils.getRootThreadGroup(), this, name, 0, false);
             thread.setContextClassLoader(null);
             thread.setDaemon(false);
             blockerThread = thread;
             return thread;
         }).start();