Spring Webflow中针对多部分请求的流执行密钥为空-Tomcat 7

Question

Our application has been running smoothly on Tomcat 6 , Jdk 7 and Spring 3.0. recently we upgraded to tomcat 7 and have started seeing strange behaviour. There is page which has upload button which is used to upload certain excel files. The way it works is that I click on browse button , select file and click on Upload. After our upgrade to tomcat 7, when i click on Upload, the page is throwing exception. Reason : flowexecution key is empty. (it is empty not null) Debugging through spring code, at this line

org.springframework.webflow.context.servlet.DefaultFlowUrlHandler#getFlowExecutionKey("execution")

I get empty string.

Although I can see the url as

http://myapplication/admin/flows/fileUploadList-flow?execution=e5s7

This is my jsp page

<form:form commandName="model" name="model" method="post" enctype="multipart/form-data" 
action="${actionPath}">
<input type="hidden" name="_flowExecutionKey" value="${flowExecutionKey}"/>
----
---
</form>

The other pages are working fine.

Any idea what is going on here ? Is this problem because of multipart request ?

Answer 1

Change

    <input type="hidden" name="_flowExecutionKey" value="${flowExecutionKey}"/>

to

    <input type="hidden" name="execution" value="${flowExecutionKey}"/>

Parameter name "flowExecutionKey" is changed to "execution" from SWF 2.0