java Camel HTTPS4调用失败，但CamelHttpResponseCode头显示200

Question

我使用的路由是使用https4组件（camel版本2.14.0）通过HTTP请求资源。死信通道通过将失败的交换路由到日志端点来处理错误，如下所示：

.to("log:backendFailed?level=WARN&showAll=true")

在网关超时（504）的情况下，将抛出一个HttpOperationFailedException指示错误，并按预期记录交换。因为我设置了showAll=true，所以exchange的所有头都会被记录，包括CamelHttpResponseCode。日志如下所示：

CamelFailureEndpoint=https4://backend?httpClient.socketTimeout=70000&httpClient.connectTimeout=70000,
...
CamelToEndpoint=log://backendFailed?level=WARN&showAll=true
...
CamelHttpResponseCode=200, 
CamelHttpUri=https://example.com/myresource, 
...
CaughtExceptionType: org.apache.camel.component.http4.HttpOperationFailedException, 
CaughtExceptionMessage: HTTP operation failed invoking https://example.com/myresource with statusCode: 504, StackTrace: org.apache.camel.component.http4.HttpOperationFailedException: HTTP operation failed invoking https://example.com/myresource with statusCode: 504

这里的CamelHttpResponseCode头不是应该写504吗