diff --git a/lucene/src/test/org/apache/lucene/index/TestIndexWriter.java b/lucene/src/test/org/apache/lucene/index/TestIndexWriter.java
index e7d5039520c..aa4842b2dcd 100644
--- a/lucene/src/test/org/apache/lucene/index/TestIndexWriter.java
+++ b/lucene/src/test/org/apache/lucene/index/TestIndexWriter.java
@@ -4315,7 +4315,7 @@ public class TestIndexWriter extends LuceneTestCase {
     volatile boolean failed;
     volatile boolean finish;
 
-    boolean allowInterrupt = false;
+    volatile boolean allowInterrupt = false;
 
     @Override
     public void run() {
@@ -4439,7 +4439,6 @@ public class TestIndexWriter extends LuceneTestCase {
     }
     t.allowInterrupt = false;
     t.finish = true;
-    t.interrupt();
     t.join();
     assertFalse(t.failed);
   }