--- a/jdk/test/java/nio/file/WatchService/LotsOfCancels.java	Wed Aug 24 10:58:29 2016 -0700
+++ b/jdk/test/java/nio/file/WatchService/LotsOfCancels.java	Wed Aug 24 11:23:58 2016 -0700
@@ -53,10 +53,11 @@
             Path testDir = Paths.get(System.getProperty("test.dir", "."));
             Path top = Files.createTempDirectory(testDir, "LotsOfCancels");
             for (int i=1; i<=16; i++) {
+                int id = i;
                 Path dir = Files.createDirectory(top.resolve("dir-" + i));
                 WatchService watcher = FileSystems.getDefault().newWatchService();
-                pool.submit(() -> handle(dir, watcher));
-                pool.submit(() -> poll(watcher));
+                pool.submit(() -> handle(id, dir, watcher));
+                pool.submit(() -> poll(id, watcher));
             }
         } finally {
             pool.shutdown();
@@ -74,7 +75,8 @@
      * Stress the given WatchService, specifically the cancel method, in
      * the given directory. Closes the WatchService when done.
      */
-    static void handle(Path dir, WatchService watcher) {
+    static void handle(int id, Path dir, WatchService watcher) {
+        System.out.printf("begin handle %d%n", id);
         try {
             try {
                 Path file = dir.resolve("anyfile");
@@ -85,12 +87,15 @@
                     key.cancel();
                 }
             } finally {
+                System.out.printf("WatchService %d closing ...%n", id);
                 watcher.close();
+                System.out.printf("WatchService %d closed %n", id);
             }
         } catch (Exception e) {
             e.printStackTrace();
             failed = true;
         }
+        System.out.printf("end handle %d%n", id);
     }
 
     /**
@@ -98,7 +103,8 @@
      * queue drained, it also hogs a CPU core which seems necessary to
      * tickle the original bug.
      */
-    static void poll(WatchService watcher) {
+    static void poll(int id, WatchService watcher) {
+        System.out.printf("begin poll %d%n", id);
         try {
             for (;;) {
                 WatchKey key = watcher.take();
@@ -108,10 +114,12 @@
                 }
             }
         } catch (ClosedWatchServiceException expected) {
-            // nothing to do
+            // nothing to do but print
+            System.out.printf("poll %d expected exception %s%n", id, expected);
         } catch (Exception e) {
             e.printStackTrace();
             failed = true;
         }
+        System.out.printf("end poll %d%n", id);
     }
 }