diff --git a/ucloud-sdk-java-common/src/main/java/cn/ucloud/common/transport/DefaultTransport.java b/ucloud-sdk-java-common/src/main/java/cn/ucloud/common/transport/DefaultTransport.java
index 105e67e9..ac31520c 100644
--- a/ucloud-sdk-java-common/src/main/java/cn/ucloud/common/transport/DefaultTransport.java
+++ b/ucloud-sdk-java-common/src/main/java/cn/ucloud/common/transport/DefaultTransport.java
@@ -79,7 +79,11 @@ public Response invoke(Request request, Class<? extends Response> clazz)
         } catch (Exception e) {
             throw new TransportException("http error", e);
         }
-        String requestId = httpResponse.getLastHeader(HEADER_REQUEST_ID).getValue();
+
+        String requestId = "";
+        if (httpResponse.getLastHeader(HEADER_REQUEST_ID) != null) {
+            requestId = httpResponse.getLastHeader(HEADER_REQUEST_ID).getValue();
+        }
 
         // check http status
         StatusLine httpStatus = httpResponse.getStatusLine();