SingletonJunitCase: Refine poll and release behavior

- Increase poll frequency from every 1000 ms -> 500 ms

- After releasing the lock, sleep to 6 x poll period, i.e. 3s

1 files changed, 5 insertions, 1 deletions

diff --git a/src/junit/com/jogamp/junit/util/SingletonJunitCase.java b/src/junit/com/jogamp/junit/util/SingletonJunitCase.java
index d7eab35..2552142 100644
--- a/src/junit/com/jogamp/junit/util/SingletonJunitCase.java
+++ b/src/junit/com/jogamp/junit/util/SingletonJunitCase.java
@@ -41,7 +41,7 @@ public abstract class SingletonJunitCase extends JunitTracer {
     public static final int SINGLE_INSTANCE_LOCK_PORT = 59999;
 
     public static final long SINGLE_INSTANCE_LOCK_TO   = 12*60*1000; // wait up to 12 mins
-    public static final long SINGLE_INSTANCE_LOCK_POLL =       1000; // poll every 1s
+    public static final long SINGLE_INSTANCE_LOCK_POLL =        500; // poll every 500 ms
 
     private static SingletonInstance singletonInstance = null; // system wide lock via port locking
     private static final Object singletonSync = new Object();  // classloader wide lock
@@ -69,6 +69,10 @@ public abstract class SingletonJunitCase extends JunitTracer {
             System.gc(); // force cleanup
             System.err.println("++++ Test Singleton.unlock()");
             singletonInstance.unlock();
+            try {
+                // 3 s sleep, allowing other instances to pick-up socket
+                Thread.sleep(3 * 2 * SINGLE_INSTANCE_LOCK_POLL);
+            } catch (final InterruptedException e) { }
         }
     }
 }