[Springframework-developer] Spring Webflow and Conversation Locking

[Scott B. <sco...@ru...>]

We've recently encountered an issue with JDK 1.5 and Spring Web Flow 1.0 
RC3 in which our threads were having problems obtaining locks.[1].  
We've only seen the issue in production and not in test (we're not sure 
why yet).

The application we are having issues with is CAS[2], which has a basic 
web flow that for the most part merely is a GET/POST.[3]  We use Web 
Flow to prevent the re-submission of credentials by using the back 
button and re-POST.

To get around the locking problem we've encountered, we've temporarily 
modified the ConversationLockFactory to return NoOp locks (essentially 
disabling locking like Java 1.4 does) while we continue to investigate.  
Are there any significant issues with disabling locking?  If not, is 
there another way to configure Spring Web Flow to disable locking so 
that we do not have to fork the code?

Thanks
-Scott

1. http://forum.springframework.org/showthread.php?t=29027
2. http://www.ja-sig.org/products/cas/
3. 
http://developer.ja-sig.org/source/browse/jasig/cas3/cas-server-webapp/src/main/webapp/WEB-INF/login-webflow.xml?r=1.1

-- 
Scott Battaglia
Application Developer, Architecture & Engineering Team
Enterprise Systems and Services, Rutgers University
v: 732.445.0097 | f: 732.445.5493 | sco...@ru...