Index: transaction/jta/src/main/java/com/sun/enterprise/transaction/JavaEETransactionImpl.java
===================================================================
--- transaction/jta/src/main/java/com/sun/enterprise/transaction/JavaEETransactionImpl.java	(revision 35343)
+++ transaction/jta/src/main/java/com/sun/enterprise/transaction/JavaEETransactionImpl.java	(working copy)
@@ -269,7 +269,9 @@
     synchronized void addResourceName(String resourceName) {
         if (resourceNames == null)
             resourceNames = new ArrayList<String>();
-        resourceNames.add(resourceName);
+        if( !resourceNames.contains(resourceName) ) {
+            resourceNames.add(resourceName);
+        }
     }
 
     synchronized ArrayList<String> getResourceNames() {
Index: transaction/jta/src/main/java/com/sun/enterprise/transaction/monitoring/TransactionServiceStatsProvider.java
===================================================================
--- transaction/jta/src/main/java/com/sun/enterprise/transaction/monitoring/TransactionServiceStatsProvider.java	(revision 35343)
+++ transaction/jta/src/main/java/com/sun/enterprise/transaction/monitoring/TransactionServiceStatsProvider.java	(working copy)
@@ -162,8 +162,8 @@
                 List<String> resourceList = txnBean.getResourceNames();
                 if (resourceList != null) {
                     for (int k = 0; k < resourceList.size(); k++) {
+                        if (k != 0) strBuf.append(",");
                         strBuf.append(resourceList.get(k));
-                        strBuf.append(",");
                     }
                 }
                 strBuf.append(LINE_BREAK);