diff --git a/.travis.yml b/.travis.yml
index ae0b86ba8af126765ca939804c2b65f801ed1795..03e86fc1d04d8805b3cb0ecba1da51b2bdf0fbc3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,6 +18,10 @@ install: true
 
 script:
   - go fmt ./... && [[ -z `git status -s` ]]
+  - mkdir -p remoting/zookeeper/zookeeper-4unittest/contrib/fatjar config_center/zookeeper/zookeeper-4unittest/contrib/fatjar registry/zookeeper/zookeeper-4unittest/contrib/fatjar
+  - wget -P "remoting/zookeeper/zookeeper-4unittest/contrib/fatjar" https://github.com/dubbogo/resources/raw/master/zookeeper-4unitest/contrib/fatjar/zookeeper-3.4.9-fatjar.jar
+  - cp remoting/zookeeper/zookeeper-4unittest/contrib/fatjar/zookeeper-3.4.9-fatjar.jar config_center/zookeeper/zookeeper-4unittest/contrib/fatjar/
+  - cp remoting/zookeeper/zookeeper-4unittest/contrib/fatjar/zookeeper-3.4.9-fatjar.jar registry/zookeeper/zookeeper-4unittest/contrib/fatjar/
   - go mod vendor && go test ./... -coverprofile=coverage.txt -covermode=atomic
 
 after_success:
diff --git a/cluster/cluster_impl/base_cluster_invoker.go b/cluster/cluster_impl/base_cluster_invoker.go
index 5bcadee281d6f9cc13fbd67dd4d3e01444de86d0..52e2156885a2e6cc3c35da75a1d0db8bcfcabec0 100644
--- a/cluster/cluster_impl/base_cluster_invoker.go
+++ b/cluster/cluster_impl/base_cluster_invoker.go
@@ -65,7 +65,7 @@ func (invoker *baseClusterInvoker) checkInvokers(invokers []protocol.Invoker, in
 	if len(invokers) == 0 {
 		ip, _ := utils.GetLocalIP()
 		return perrors.Errorf("Failed to invoke the method %v. No provider available for the service %v from "+
-			"registry %v on the consumer %v using the dubbo constant %v .Please check if the providers have been started and registered.",
+			"registry %v on the consumer %v using the dubbo version %v .Please check if the providers have been started and registered.",
 			invocation.MethodName(), invoker.directory.GetUrl().SubURL.Key(), invoker.directory.GetUrl().String(), ip, constant.Version)
 	}
 	return nil
@@ -76,7 +76,7 @@ func (invoker *baseClusterInvoker) checkInvokers(invokers []protocol.Invoker, in
 func (invoker *baseClusterInvoker) checkWhetherDestroyed() error {
 	if invoker.destroyed.Load() {
 		ip, _ := utils.GetLocalIP()
-		return perrors.Errorf("Rpc cluster invoker for %v on consumer %v use dubbo constant %v is now destroyed! can not invoke any more. ",
+		return perrors.Errorf("Rpc cluster invoker for %v on consumer %v use dubbo version %v is now destroyed! can not invoke any more. ",
 			invoker.directory.GetUrl().Service(), ip, constant.Version)
 	}
 	return nil
diff --git a/cluster/cluster_impl/failover_cluster_invoker.go b/cluster/cluster_impl/failover_cluster_invoker.go
index b29acbf1133fe35f7a380158faacd9b772871a92..3dd8c41dfb7b7512d7c81fa6d7f8a7c35cec0dcb 100644
--- a/cluster/cluster_impl/failover_cluster_invoker.go
+++ b/cluster/cluster_impl/failover_cluster_invoker.go
@@ -90,6 +90,6 @@ func (invoker *failoverClusterInvoker) Invoke(invocation protocol.Invocation) pr
 	ip, _ := utils.GetLocalIP()
 	return &protocol.RPCResult{Err: perrors.Errorf("Failed to invoke the method %v in the service %v. Tried %v times of "+
 		"the providers %v (%v/%v)from the registry %v on the consumer %v using the dubbo version %v. Last error is %v.",
-		methodName, invoker.GetUrl().Service(), retries, providers, len(providers), len(invokers), invoker.directory.GetUrl(), ip, version.Version, result.Error().Error(),
+		methodName, invoker.GetUrl().Service(), retries, providers, len(providers), len(invokers), invoker.directory.GetUrl(), ip, constant.Version, result.Error().Error(),
 	)}
 }
diff --git a/config/config_loader.go b/config/config_loader.go
index a2174b90cc43ecfcf53ae3a0afc2938da1704f0c..c5127c8c43622e7b26c998eb54e1b1803e6575ec 100644
--- a/config/config_loader.go
+++ b/config/config_loader.go
@@ -92,7 +92,7 @@ func Load() {
 						checkok = false
 						count++
 						if count > maxWait {
-							panic(fmt.Sprintf("Failed to check the status of the service %v . No provider available for the service to the consumer use dubbo constant %v", refconfig.InterfaceName, constant.Version))
+							panic(fmt.Sprintf("Failed to check the status of the service %v . No provider available for the service to the consumer use dubbo version %v", refconfig.InterfaceName, constant.Version))
 						}
 						time.Sleep(time.Second * 1)
 						break
diff --git a/config_center/zookeeper/zookeeper-4unitest/contrib/fatjar/zookeeper-3.4.9-fatjar.jar b/config_center/zookeeper/zookeeper-4unitest/contrib/fatjar/zookeeper-3.4.9-fatjar.jar
deleted file mode 100644
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Binary files a/config_center/zookeeper/zookeeper-4unitest/contrib/fatjar/zookeeper-3.4.9-fatjar.jar and /dev/null differ
diff --git a/registry/zookeeper/zookeeper-4unitest/contrib/fatjar/zookeeper-3.4.9-fatjar.jar b/registry/zookeeper/zookeeper-4unitest/contrib/fatjar/zookeeper-3.4.9-fatjar.jar
deleted file mode 100644
index 839531b8b8762a9c19e334a5cbf79314cb16f945..0000000000000000000000000000000000000000
Binary files a/registry/zookeeper/zookeeper-4unitest/contrib/fatjar/zookeeper-3.4.9-fatjar.jar and /dev/null differ
diff --git a/remoting/zookeeper/zookeeper-4unitest/contrib/fatjar/zookeeper-3.4.9-fatjar.jar b/remoting/zookeeper/zookeeper-4unitest/contrib/fatjar/zookeeper-3.4.9-fatjar.jar
deleted file mode 100644
index 839531b8b8762a9c19e334a5cbf79314cb16f945..0000000000000000000000000000000000000000
Binary files a/remoting/zookeeper/zookeeper-4unitest/contrib/fatjar/zookeeper-3.4.9-fatjar.jar and /dev/null differ