diff --git a/server/src/com/cloud/agent/manager/AgentManagerImpl.java b/server/src/com/cloud/agent/manager/AgentManagerImpl.java
index 00ad5556d27..10900382cd4 100755
--- a/server/src/com/cloud/agent/manager/AgentManagerImpl.java
+++ b/server/src/com/cloud/agent/manager/AgentManagerImpl.java
@@ -1140,7 +1140,7 @@ public class AgentManagerImpl implements AgentManager, HandlerFactory, Manager {
                         }
                     } else if (e instanceof HypervisorVersionChangedException) {
                         handleDisconnect(attache, Event.HypervisorVersionChanged, true);
-                        throw new CloudRuntimeException("Unable to connect " + attache.getId(), e);
+                        throw new CloudRuntimeException("Hypervisor Version Changed, disconnect host " + attache.getId() + " will reconnect later", e);
                     } else {
                         s_logger.error("Monitor " + monitor.second().getClass().getSimpleName() + " says there is an error in the connect process for " + hostId + " due to " + e.getMessage(), e);
                         handleDisconnect(attache, Event.AgentDisconnected, true);
diff --git a/server/src/com/cloud/hypervisor/xen/discoverer/XcpServerDiscoverer.java b/server/src/com/cloud/hypervisor/xen/discoverer/XcpServerDiscoverer.java
index 9fcc7e96384..b999440776c 100755
--- a/server/src/com/cloud/hypervisor/xen/discoverer/XcpServerDiscoverer.java
+++ b/server/src/com/cloud/hypervisor/xen/discoverer/XcpServerDiscoverer.java
@@ -559,10 +559,10 @@ public class XcpServerDiscoverer extends DiscovererBase implements Discoverer, L
             throw new RuntimeException(msg);
         }
         if (! resource.equals(host.getResource()) ) {
+            String msg = "host " + host.getPrivateIpAddress() + " changed from " + host.getResource() + " to " + resource;
             host.setResource(resource);
             host.setSetup(false);
             _hostDao.update(agentId, host);
-            String msg = "host " + host.getPrivateIpAddress() + " changed from " + host.getResource() + " to " + resource;
             s_logger.debug(msg);
             throw new HypervisorVersionChangedException(msg);
         }