Android的ossFile.uploadInBackground方法有问题啊

图片上传成功了还会去调用一次SaveCallback接口的onFailure方法，我也是醉了
String contenttype = getContentType(getFileExt(srcFilePath));
        OSSBucket sampleBucket = new OSSBucket(bucket);

        OSSFile ossFile = new OSSFile(sampleBucket,key);
        ossFile.setUploadFilePath(srcFilePath,contenttype);
        ossFile.enableUploadCheckMd5sum();
        TaskHandler tkh = ossFile.uploadInBackground(new SaveCallback() {
            @Override
            public void onSuccess(String s) {
                Log.d(TAG,s+"上传成功");
                uploadFileCallback.onSuccess(s);
            }

            @Override
            public void onProgress(String s, int i, int i2) {
                Log.d(TAG,s+"正在上传中");
                uploadFileCallback.onProgress(s,i,i2);
            }

            @Override
            public void onFailure(String s, OSSException e) {
                Log.d(TAG,s+"上传失败");
                uploadFileCallback.onFailure(s,e);
            }
        });