Index: java/org/apache/catalina/session/PersistentManagerBase.java
===================================================================
--- java/org/apache/catalina/session/PersistentManagerBase.java	(revision 1005476)
+++ java/org/apache/catalina/session/PersistentManagerBase.java	(working copy)
@@ -536,7 +536,7 @@
         if (store == null)
             return;
 
-        String[] ids = null;
+        String[] ids = new String[0];
         try {
             if (SecurityUtil.isPackageProtectionEnabled()){
                 try{