Java 接收POST调用的HttpClientErrorException时缺少ResponseBodyAsString

我试图在RestClient调用中发送带有Http状态代码的自定义错误消息

微服务1代码：

try{
   String method = request.getMethod();
   RestTemplate restTemplate = new RestTemplate();
   ResponseEntity<byte[]> responseEntity = restTemplate.exchange("/someUrl", method, entity, byte[].class);
} catch (HttpServerErrorException | HttpClientErrorException e) {
   String errorString = e.getResponseBodyAsString();
   if(Strings.isNullOrEmpty(errorString)) {
      errorString = e.getMessage();
   }
   return new ResponseEntity<>(errorString, new HttpHeaders(), e.getStatusCode());
}

来自microservice 1呼叫后响应： 响应状态代码-401

{
  "errorMessage": "test error message"
}

401 null

对于GET方法，其工作方式与预期相同，但是对于POST/PUT/DELETE，它不适用于microservice到microservice

当我用POST方法直接从postman中点击microservice2时，它起作用了，但当我用POST方法从microservice1中点击microservice2时，它不起作用了

当我从microservice 1点击microservice 2控制器时，以下是响应标题：

{
Access-Control-Allow-Credentials=[true], 
Access-Control-Allow-Methods=[GET,POST,PUT,PATCH,DELETE,HEAD], 
X-Application-Context=[eportal:local:8082], 
ep-flowid=[c35c3098-a7a5-712a-8e38-4d1ad99fccd0], 
Access-Control-Expose-Headers=[ep-flowid], 
X-Content-Type-Options=[nosniff], 
X-XSS-Protection=[1; mode=block], 
Cache-Control=[no-cache, no-store, max-age=0, must-revalidate], 
Pragma=[no-cache], 
Expires=[0], 
X-Frame-Options=[DENY], 
Content-Type=[application/json;charset=UTF-8], 
Content-Length=[29], 
Date=[Mon, 01 Jun 2020 13:59:59 GMT]
}

当我从邮递员处点击microservice 2控制器时，以下是响应标题：

{
Access-Control-Allow-Credentials=[true], 
Access-Control-Allow-Methods=[GET,POST,PUT,PATCH,DELETE,HEAD], 
X-Application-Context=[eportal:local:8082], 
ep-flowid=[c35c3098-a7a5-712a-8e38-4d1ad99fccd0], 
Access-Control-Expose-Headers=[ep-flowid], 
X-Content-Type-Options=[nosniff], 
X-XSS-Protection=[1; mode=block], 
Cache-Control=[no-cache, no-store, max-age=0, must-revalidate], 
Pragma=[no-cache], 
Expires=[0], 
X-Frame-Options=[DENY], 
Content-Type=[application/json;charset=UTF-8], 
Content-Length=[29], 
Date=[Mon, 01 Jun 2020 13:59:59 GMT]
}