diff --git a/server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java b/server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java
index 97fd43c8646..49fa23ad968 100755
--- a/server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java
+++ b/server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java
@@ -827,15 +827,18 @@ public class VirtualNetworkApplianceManagerImpl implements VirtualNetworkApplian
         
         @Override
         public void run() {
-            
-            final List<DomainRouterVO> routers = _routerDao.listVirtualUpByHostId(null);
-            s_logger.debug("Found " + routers.size() + " running routers. ");
+            try {
+                final List<DomainRouterVO> routers = _routerDao.listVirtualUpByHostId(null);
+                s_logger.debug("Found " + routers.size() + " running routers. ");
 
-            updateRoutersRedundantState(routers);
-            
-            /* FIXME assumed the a pair of redundant routers managed by same mgmt server,
-             * then the update above can get the latest status */
-            checkDuplicateMaster(routers);
+                updateRoutersRedundantState(routers);
+
+                /* FIXME assumed the a pair of redundant routers managed by same mgmt server,
+                 * then the update above can get the latest status */
+                checkDuplicateMaster(routers);
+            } catch (Exception ex) {
+                s_logger.error("Fail to complete the CheckRouterTask! ", ex);
+            }
         }
     }