diff --git a/.travis.yml b/.travis.yml
index 4f79ecf3bc1439e00c88c4d0de74cc7a4bf26909..fb958136b0a61b43f0a8fa650cb1ef3bd3b9d689 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,7 +15,7 @@ install: true
 
 # define ci-stage
 script:
-  - go fmt ./... && [[ -z `git status -s` ]]
+  - go fmt ./... && git checkout -- go.mod && [[ -z `git status -s` ]]
   # license-check
   - make verify
   # integrate-test
diff --git a/registry/kubernetes/registry.go b/registry/kubernetes/registry.go
index 55be4c392abcc14557c60af15b92bc84855b4b31..c4a0352cfaa3273c92296be6279c0aae71f0448b 100644
--- a/registry/kubernetes/registry.go
+++ b/registry/kubernetes/registry.go
@@ -39,11 +39,6 @@ import (
 	"github.com/apache/dubbo-go/remoting/kubernetes"
 )
 
-//var (
-//	processID = ""
-//	localIP   = ""
-//)
-
 const (
 	Name         = "kubernetes"
 	ConnDelay    = 3
diff --git a/remoting/getty/getty_client.go b/remoting/getty/getty_client.go
index 7ae0317330fb30e133ce03a87a3f0eb28938a365..57221cc6d7f2b9668e6a0518b6678b37e4924bf1 100644
--- a/remoting/getty/getty_client.go
+++ b/remoting/getty/getty_client.go
@@ -40,7 +40,7 @@ import (
 var (
 	errSessionNotExist   = perrors.New("session not exist")
 	errClientClosed      = perrors.New("client closed")
-	errClientReadTimeout = perrors.New("client read timeout")
+	errClientReadTimeout = perrors.New("maybe the client read timeout or fail to decode tcp stream in Writer.Write")
 
 	clientConf   *ClientConfig
 	clientGrpool gxsync.GenericTaskPool