diff --git a/.github/workflows/intergration-test.yml b/.github/workflows/intergration-test.yml
index 542c7bd..3bb1fb6 100644
--- a/.github/workflows/intergration-test.yml
+++ b/.github/workflows/intergration-test.yml
@@ -11,7 +11,6 @@ jobs:
       matrix:
         go: [ "1.15", "1.16" ]
         hdfs-version:
-          - 3.2.2
           - 3.3.0
           - 3.3.1
         os: [ubuntu-latest]
diff --git a/storage.go b/storage.go
index c38e58e..9ebe87a 100644
--- a/storage.go
+++ b/storage.go
@@ -34,14 +34,21 @@ func (s *Storage) create(path string, opt pairStorageCreate) (o *Object) {
 func (s *Storage) createAppend(ctx context.Context, path string, opt pairStorageCreateAppend) (o *Object, err error) {
 	rp := s.getAbsPath(path)
 	dir := filepath.Dir(rp)
-	err = s.hdfs.MkdirAll(dir, 0666)
+
+	//	If dirname is already a directory,
+	// 	MkdirAll does nothing and returns nil.
+	err = s.hdfs.MkdirAll(dir, 0755)
+	//	If dirname is not exist ,it will create a Mkdir rpc communication
+	//	So we just need to catch other errors
 	if err != nil {
-		return
+		return nil, err
 	}
 
 	_, err = s.hdfs.Stat(rp)
 
+	//	The error returned by Stat can only be nil or not os.ErrNotExist
 	if err == nil {
+		//	If the error returned by Stat is nil, the path must exist.
 		err = s.hdfs.Remove(rp)
 		if err != nil && errors.Is(err, os.ErrNotExist) {
 			// Omit `file not exist` error here
@@ -50,12 +57,21 @@ func (s *Storage) createAppend(ctx context.Context, path string, opt pairStorage
 		}
 	}
 
+	//	This ensures that err can only be os.ErrNotExist
+	if err != nil && !errors.Is(err, os.ErrNotExist) {
+		return nil, err
+	}
+
 	f, err := s.hdfs.Create(rp)
+
 	if err != nil {
-		return
+		return nil, err
 	}
 	defer func() {
-		f.Close()
+		closeErr := f.Close()
+		if err == nil {
+			err = closeErr
+		}
 	}()
 
 	o = s.newObject(true)
@@ -69,9 +85,13 @@ func (s *Storage) createAppend(ctx context.Context, path string, opt pairStorage
 func (s *Storage) createDir(ctx context.Context, path string, opt pairStorageCreateDir) (o *Object, err error) {
 	rp := s.getAbsPath(path)
 
+	//	If dirname is already a directory,
+	// 	MkdirAll does nothing and returns nil.
 	err = s.hdfs.MkdirAll(rp, 0755)
+	//	If dirname is not exist ,it will create a Mkdir rpc communication
+	//	So we just need to catch other errors
 	if err != nil {
-		return
+		return nil, err
 	}
 
 	o = s.newObject(true)
@@ -83,12 +103,14 @@ func (s *Storage) createDir(ctx context.Context, path string, opt pairStorageCre
 
 func (s *Storage) delete(ctx context.Context, path string, opt pairStorageDelete) (err error) {
 	rp := s.getAbsPath(path)
+
 	err = s.hdfs.Remove(rp)
 	if err != nil && errors.Is(err, os.ErrNotExist) {
 		// Omit `file not exist` error here
 		// ref: [GSP-46](https://github.com/beyondstorage/specs/blob/master/rfcs/46-idempotent-delete.md)
 		err = nil
 	}
+	
 	return err
 }
 
@@ -120,12 +142,16 @@ func (s *Storage) move(ctx context.Context, src string, dst string, opt pairStor
 			return services.ErrObjectModeInvalid
 		}
 	}
+
 	return s.hdfs.Rename(rs, rd)
 }
 
 func (s *Storage) read(ctx context.Context, path string, w io.Writer, opt pairStorageRead) (n int64, err error) {
 	rp := s.getAbsPath(path)
 	f, err := s.hdfs.Open(rp)
+	if err != nil {
+		return 0, err
+	}
 
 	defer func() {
 		closeErr := f.Close()
@@ -134,9 +160,6 @@ func (s *Storage) read(ctx context.Context, path string, w io.Writer, opt pairSt
 		}
 	}()
 
-	if err != nil {
-		return 0, err
-	}
 	if opt.HasOffset {
 		_, err := f.Seek(opt.Offset, 0)
 		if err != nil {
@@ -186,13 +209,21 @@ func (s *Storage) stat(ctx context.Context, path string, opt pairStorageStat) (o
 func (s *Storage) write(ctx context.Context, path string, r io.Reader, size int64, opt pairStorageWrite) (n int64, err error) {
 	rp := s.getAbsPath(path)
 	dir := filepath.Dir(rp)
-	err = s.hdfs.MkdirAll(dir, 0666)
+
+	//	If dirname is already a directory,
+	// 	MkdirAll does nothing and returns nil.
+	err = s.hdfs.MkdirAll(dir, 0755)
+	//	If dirname is not exist ,it will create a Mkdir rpc communication
+	//	So we just need to catch other errors
 	if err != nil {
 		return 0, err
 	}
+
 	_, err = s.hdfs.Stat(rp)
 	if err == nil {
+		//	If the error returned by Stat is nil, the path must exist.
 		err = s.hdfs.Remove(rp)
+
 		if err != nil && errors.Is(err, os.ErrNotExist) {
 			// Omit `file not exist` error here
 			// ref: [GSP-46](https://github.com/beyondstorage/specs/blob/master/rfcs/46-idempotent-delete.md)
@@ -200,10 +231,16 @@ func (s *Storage) write(ctx context.Context, path string, r io.Reader, size int6
 		}
 	}
 
+	//	This ensures that err can only be os.ErrNotExist
+	if err != nil && !errors.Is(err, os.ErrNotExist) {
+		return 0, err
+	}
+
 	f, err := s.hdfs.Create(rp)
 	if err != nil {
 		return 0, err
 	}
+
 	defer func() {
 		closeErr := f.Close()
 		if err == nil {
@@ -220,11 +257,16 @@ func (s *Storage) write(ctx context.Context, path string, r io.Reader, size int6
 
 func (s *Storage) writeAppend(ctx context.Context, o *Object, r io.Reader, size int64, opt pairStorageWriteAppend) (n int64, err error) {
 	f, err := s.hdfs.Append(o.ID)
+
 	if err != nil {
 		return
 	}
+
 	defer func() {
-		f.Close()
+		closeErr := f.Close()
+		if err == nil {
+			err = closeErr
+		}
 	}()
 
 	return io.CopyN(f, r, size)