diff --git a/lucene/core/src/java/org/apache/lucene/util/NamedThreadFactory.java b/lucene/core/src/java/org/apache/lucene/util/NamedThreadFactory.java
index 84a94c5..44799e0 100644
--- a/lucene/core/src/java/org/apache/lucene/util/NamedThreadFactory.java
+++ b/lucene/core/src/java/org/apache/lucene/util/NamedThreadFactory.java
@@ -29,8 +29,8 @@ import java.util.concurrent.atomic.AtomicInteger;
  * {@link Executors#defaultThreadFactory()}.
  */
 public class NamedThreadFactory implements ThreadFactory {
+  private static final ThreadFactory FACTORY = Executors.defaultThreadFactory();
   private static final AtomicInteger threadPoolNumber = new AtomicInteger(1);
-  private final ThreadGroup group;
   private final AtomicInteger threadNumber = new AtomicInteger(1);
   private static final String NAME_PATTERN = "%s-%d-thread";
   private final String threadNamePrefix;
@@ -41,9 +41,6 @@ public class NamedThreadFactory implements ThreadFactory {
    * @param threadNamePrefix the name prefix assigned to each thread created.
    */
   public NamedThreadFactory(String threadNamePrefix) {
-    final SecurityManager s = System.getSecurityManager();
-    group = (s != null) ? s.getThreadGroup() : Thread.currentThread()
-        .getThreadGroup();
     this.threadNamePrefix = String.format(Locale.ROOT, NAME_PATTERN,
         checkPrefix(threadNamePrefix), threadPoolNumber.getAndIncrement());
   }
@@ -58,11 +55,10 @@ public class NamedThreadFactory implements ThreadFactory {
    * @see java.util.concurrent.ThreadFactory#newThread(java.lang.Runnable)
    */
   public Thread newThread(Runnable r) {
-    final Thread t = new Thread(group, r, String.format(Locale.ROOT, "%s-%d",
-        this.threadNamePrefix, threadNumber.getAndIncrement()), 0);
-    t.setDaemon(false);
-    t.setPriority(Thread.NORM_PRIORITY);
-    return t;
+    final Thread newThread = FACTORY.newThread(r);
+    newThread.setName(String.format(Locale.ROOT, "%s-%d",
+        this.threadNamePrefix, threadNumber.getAndIncrement()));
+    return newThread;
   }
 
 }