diff --git a/plugins/hypervisors/ucs/src/com/cloud/ucs/manager/UcsManagerImpl.java b/plugins/hypervisors/ucs/src/com/cloud/ucs/manager/UcsManagerImpl.java
index 150e3dc19fd..e2bd31d12a6 100755
--- a/plugins/hypervisors/ucs/src/com/cloud/ucs/manager/UcsManagerImpl.java
+++ b/plugins/hypervisors/ucs/src/com/cloud/ucs/manager/UcsManagerImpl.java
@@ -132,7 +132,14 @@ public class UcsManagerImpl implements UcsManager {
 
     @Override
     @DB
-    public UcsManagerResponse addUcsManager(AddUcsManagerCmd cmd) {
+    public UcsManagerResponse addUcsManager(AddUcsManagerCmd cmd) {
+    	SearchCriteriaService<UcsManagerVO, UcsManagerVO> q = SearchCriteria2.create(UcsManagerVO.class);
+    	q.addAnd(q.getEntity().getUrl(), Op.EQ, cmd.getUrl());
+    	UcsManagerVO mgrvo = q.find();
+    	if (mgrvo != null) {
+    	    throw new IllegalArgumentException(String.format("duplicate UCS manager. url[%s] is used by another UCS manager already", cmd.getUrl()));
+    	}
+    	 
         UcsManagerVO vo = new UcsManagerVO();
         vo.setUuid(UUID.randomUUID().toString());
         vo.setPassword(cmd.getPassword());
@@ -141,6 +148,7 @@ public class UcsManagerImpl implements UcsManager {
         vo.setZoneId(cmd.getZoneId());
         vo.setName(cmd.getName());
 
+
         Transaction txn = Transaction.currentTxn();
         txn.start();
         ucsDao.persist(vo);