[HUDSON-2721] Calling task with a timeout to help diagnose hang.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@13539 71c3de6d-444a-0410-be80-ed276b4c234a

test/src/test/java/hudson/slaves/JNLPLauncherTest.java

@@ -17,6 +17,7 @@ import java.io.File;
 import java.net.URL;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.TimeUnit;
 
 /**
  * @author Kohsuke Kawaguchi
@@ -71,7 +72,9 @@ public class JNLPLauncherTest extends HudsonTestCase {
 
             assertFalse("Slave failed to go online", c.isOffline());
             // run some trivial thing
-            c.getChannel().call(new NoopTask());
+            System.err.println("Calling task...");
+            assertEquals("done", c.getChannel().callAsync(new NoopTask()).get(5, TimeUnit.MINUTES));
+            System.err.println("...done.");
         } finally {
             proc.kill();
         }
@@ -106,7 +109,7 @@ public class JNLPLauncherTest extends HudsonTestCase {
 
     private static class NoopTask implements Callable<String,RuntimeException> {
         public String call() {
-            return null;
+            return "done";
         }
 
         private static final long serialVersionUID = 1L;