Index: src/openmap/com/bbn/openmap/util/TaskService.java
===================================================================
--- src/openmap/com/bbn/openmap/util/TaskService.java	(revision 2164)
+++ src/openmap/com/bbn/openmap/util/TaskService.java	(working copy)
@@ -26,9 +26,7 @@
    
    public static void initialize(PropertyHandler properties) {
       synchronized (TaskService.class) {
-         if (singleton != null) {
-            throw new RuntimeException("Thread pool has already been initialized.");
-         }
+    	 TaskService old = singleton;
          Properties openmapProperties = properties.getProperties(Environment.OpenMapPrefix);
          String poolSizeString = openmapProperties.getProperty(Environment.ThreadPool);
          int poolSize;
@@ -37,7 +35,16 @@
          } else {
             poolSize = DEFAULT_POOL_SIZE;
          }
-         singleton = new TaskService(poolSize);
+
+			if ((old == null) || (old.poolSize != poolSize)) {
+				singleton = new TaskService(poolSize);
+
+				// shut down the old executor
+				if (old != null) {
+					old.executor.shutdown();
+				}
+			}
+
       }
    }
    
@@ -54,9 +61,11 @@
    }
    
    private final ExecutorService executor;
+   private final int poolSize;
    
    private TaskService(int poolSize) {
       executor = Executors.newFixedThreadPool(poolSize);
+      this.poolSize = poolSize;
    }
    
    /**