*) next try todo a bugfix

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@1475 6c8d7289-2bf4-0310-a012-ef5d649a1542

source/de/anomic/plasma/plasmaCrawlStacker.java

@@ -858,8 +858,12 @@ public final class plasmaCrawlStacker {
                             // return thread back into pool
                             plasmaCrawlStacker.this.theWorkerPool.returnObject(this);
                             
-                            // We are waiting for a new task now.
+                            // We are waiting for a new task now.                            
-                            synchronized (this) { this.wait(); }
+                            synchronized (this) { 
+                                if (!this.stopped && !this.destroyed && !this.isInterrupted()) { 
+                                    this.wait(); 
+                                }
+                            }
                         } else {
                             try  {
                                 // executing the new task