diff --git a/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/event/request/impl/message/MessageRequestProcessor.java b/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/event/request/impl/message/MessageRequestProcessor.java
index 237eab16..8ad042bb 100755
--- a/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/event/request/impl/message/MessageRequestProcessor.java
+++ b/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/event/request/impl/message/MessageRequestProcessor.java
@@ -102,6 +102,11 @@ public class MessageRequestProcessor extends SIPRequestProcessorParent implement
                     sipEvent.getErrorEvent().response(eventResult);
                 }
             }else {
+                byte[] rawContent = request.getRawContent();
+                if (rawContent == null) {
+                    responseAck(request, Response.BAD_REQUEST, "content is null");
+                    return;
+                }
                 Element rootElement;
                 try {
                     rootElement = getRootElement(evt);