我定义了以下异常映射器来处理自定义 HttpCustomException

package com.myapp.apis;

import com.myapp.apis.model.HttpCustomException;
import com.myapp.apis.model.HttpCustomExceptionStatusType;
import com.myapp.apis.model.HttpCustomNotAuthorizedException;

import javax.ws.rs.core.Response;
import javax.ws.rs.ext.ExceptionMapper;
import javax.ws.rs.ext.Provider;

@Provider
public class HttpCustomExceptionMapper implements ExceptionMapper <HttpCustomException> {

  @Override
  public Response toResponse (HttpCustomException e) {
    Response response = Response.status (new HttpCustomExceptionStatusType (Response.Status.UNAUTHORIZED, e.getMessage ())).build ();
    if (e instanceof HttpCustomNotAuthorizedException) {
      response = Response.status (new HttpCustomExceptionStatusType (Response.Status.INTERNAL_SERVER_ERROR, e.getMessage ())).build ();
    }

    System.out.println ("HttpCustomExceptionMapper: " + response.getStatus () + ", " + response.getStatusInfo ().getReasonPhrase ());
    return response;
  }
}

当HttpCustomNotAuthorizedException在代码中引发a时，我可以toResponse在catalina.out
中看到方法结尾定义的日志消息。因此，在请求处理期间将调用HttpCustomExceptionMapper类。但是，在最终响应中，我在客户端看到的是我只看到标准Not Authorized消息，而不是我在响应中设置的自定义消息。

为什么会这样？