fix logging warn level

git-svn-id: https://svn.apache.org/repos/asf/archiva/redback/redback-components/trunk@1546881 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/archiva/redback/components/taskqueue/execution/ThreadedTaskQueueExecutor.java b/src/main/java/org/apache/archiva/redback/components/taskqueue/execution/ThreadedTaskQueueExecutor.java
index 213f6dc..c79dc43 100644
--- a/src/main/java/org/apache/archiva/redback/components/taskqueue/execution/ThreadedTaskQueueExecutor.java
+++ b/src/main/java/org/apache/archiva/redback/components/taskqueue/execution/ThreadedTaskQueueExecutor.java
@@ -218,8 +218,7 @@
                 else
                 {
                     logger.warn(
-                        "Task not cancelled (Flags: done: " + future.isDone() + " cancelled: " + future.isCancelled()
-                            + ")" );
+                        "Task not cancelled (Flags: done: {} cancelled: {})", future.isDone(), future.isCancelled() );
                 }
             }
             else