[WICKET-311] race condition between wicket.session.pagemap.LeastRecentlyAccessedEvictionStrategy and Session.getPage()

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 1.2.3
• Fix Version/s: 1.2.7
• Component/s: wicket
• Environment: Glassfish, Open Portlet Container
• Assignee: Ate Douma
• Reporter: János Cserép
• Created: 22/Feb/07 11:46
• Updated: 30/Oct/07 21:39
• Resolved: 30/Oct/07 21:39

Description

I'm seeing a race condition when using PortletApplication (probably because of overlapping RENDER and ACTION phases)

One thread is stopped here:

wicket.session.pagemap.LeastRecentlyAccessedEvictionStrategy.evict(LeastRecentlyAccessedEvictionStrategy.java:60)
wicket.Page.endVersion(Page.java:1136)
wicket.Page.internalOnDetach(Page.java:811)
wicket.Component.internalDetach(Component.java:2571)
wicket.MarkupContainer.internalDetach(MarkupContainer.java:374)
wicket.Page.internalDetach(Page.java:300)
wicket.request.target.component.PageRequestTarget.detach(PageRequestTarget.java:84)
wicket.RequestCycle.detach(RequestCycle.java:807)
wicket.RequestCycle.steps(RequestCycle.java:1102)
wicket.RequestCycle.request(RequestCycle.java:454)
wicket.protocol.http.portlet.WicketPortlet.render(WicketPortlet.java:250)

The other throws an exception after 1 minute here:

wicket.WicketRuntimeException: After 1 minute the Pagemap null is still locked by: Thread[httpWorkerThread-8080-0,10,Grizzly], giving up trying to get the page for path: 0:tabs:panel:tasklist:topToolbars:1:toolbar:span:navigator:navigation:4:pageLink
at wicket.Session.getPage(Session.java:440)
at wicket.protocol.http.portlet.PortletRequestTargetResolverStrategy.resolveRenderedPage(PortletRequestTargetResolverStrategy.java:214)
at wicket.protocol.http.portlet.PortletRequestTargetResolverStrategy.resolve(PortletRequestTargetResolverStrategy.java:135)
at wicket.request.compound.AbstractCompoundRequestCycleProcessor.resolve(AbstractCompoundRequestCycleProcessor.java:48)
at wicket.RequestCycle.step(RequestCycle.java:992)
at wicket.RequestCycle.steps(RequestCycle.java:1084)
at wicket.RequestCycle.request(RequestCycle.java:454)
at wicket.protocol.http.portlet.WicketPortlet.processAction(WicketPortlet.java:198)