[WICKET-1471] FeedbackPanel does not work properly in clustered environment

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 1.3.2
• Fix Version/s: 1.3.5
• Assignee: Unassigned
• Reporter: Juliano Viana
• Created: 01/Apr/08 13:53
• Updated: 18/Sep/08 23:05
• Resolved: 18/Sep/08 23:05

Description

Environment: Tomcat 5.5.25, Java 6, non-sticky session clustering, redirect to render strategy.

Consider the following scenario:

• Two tomcat instances running a Wicket application in clustered mode
• Application contains a page that has a form and a feedback panel
• Web browser posts the form. The post is processed in cluster node A
• Application in cluster node A validates the form and produces some feedback messages
• Request ends, Wicket ->clears all component feedback messages from the session<- , replicates the session, and issues a redirect to render the page
• Browser follows the redirect and hits the application in node B
• Application in node B renders the page but, because there are no feedback messages on the session , the feedback panel is not made visible

The solution I found (don't know if its the best one) is to change WebSession.java to clear component feedback messages only if the current request is not a redirect.
This solution breaks one test case (WicketTesterTest) because it takes the broken behavior for granted.

I will attach a patch to WebSession and to WicketTesterTest.