diff --git a/redback-rbac/redback-rbac-role-manager/src/main/java/org/apache/archiva/redback/role/DefaultRoleManager.java b/redback-rbac/redback-rbac-role-manager/src/main/java/org/apache/archiva/redback/role/DefaultRoleManager.java
index 93920b3f..3f40c0a4 100644
--- a/redback-rbac/redback-rbac-role-manager/src/main/java/org/apache/archiva/redback/role/DefaultRoleManager.java
+++ b/redback-rbac/redback-rbac-role-manager/src/main/java/org/apache/archiva/redback/role/DefaultRoleManager.java
@@ -492,6 +492,7 @@ public class DefaultRoleManager
     public void initialize()
     {
 
+        knownResources = new HashMap<String, ModelApplication>();
         StopWatch stopWatch = new StopWatch();
         stopWatch.start();
 
diff --git a/redback-rbac/redback-rbac-tests/src/main/java/org/apache/archiva/redback/tests/AbstractRbacManagerTestCase.java b/redback-rbac/redback-rbac-tests/src/main/java/org/apache/archiva/redback/tests/AbstractRbacManagerTestCase.java
index 65974d9f..9d5162db 100644
--- a/redback-rbac/redback-rbac-tests/src/main/java/org/apache/archiva/redback/tests/AbstractRbacManagerTestCase.java
+++ b/redback-rbac/redback-rbac-tests/src/main/java/org/apache/archiva/redback/tests/AbstractRbacManagerTestCase.java
@@ -985,6 +985,12 @@ public abstract class AbstractRbacManagerTestCase
 
     }
 
+    @Test
+    public void testInitialize() throws Exception
+    {
+        rbacManager.initialize();
+    }
+
     /**
      * Allows subclasses to hook code after a test case has finished it's setup
      */