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https://issues.apache.org/jira/browse/WICKET-5727?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14166858#comment-14166858
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Ann Baert edited comment on WICKET-5727 at 10/10/14 1:56 PM:
-------------------------------------------------------------
Quickstart and screenshot with showing the increase of the threads.
was (Author: ann):
Quickstart and screenshots with showing the increase of the threads.
> PageAccessSynchronizer$PageLock.waitForRelease problem with opening pdf files
> -----------------------------------------------------------------------------
>
> Key: WICKET-5727
> URL: https://issues.apache.org/jira/browse/WICKET-5727
> Project: Wicket
> Issue Type: Bug
> Affects Versions: 6.17.0
> Reporter: Ann Baert
> Attachments: PdfLinkQuickstart.zip, jetty-threads.jpg
>
>
> When opening a pdf file and it takes a while, the user can keep clicking on
> the link, so the request is send again. When the user keep's clicking on the
> link we receive a lot of requests on the Page that is locked. And the number
> of used threads in jetty are increasing quickly even with an application
> crash as a result. So we are looking for a solution to freeze the page when
> the user has clicked on the link as long as the pdf is not done.
> I've made a quickstart with a link with a sleeping time before showing to
> simulate this problem.
> The stacktrace:
> Stacktrace: at java.lang.Object.wait(Native Method) at
> org.apache.wicket.page.PageAccessSynchronizer$PageLock.waitForRelease(PageAccessSynchronizer.java:333)
> at
> org.apache.wicket.page.PageAccessSynchronizer.lockPage(PageAccessSynchronizer.java:117)
> at
> org.apache.wicket.page.PageAccessSynchronizer$2.getPage(PageAccessSynchronizer.java:233)
> at
> org.apache.wicket.DefaultMapperContext.getPageInstance(DefaultMapperContext.java:148)
> at
> org.apache.wicket.core.request.handler.PageProvider.getStoredPage(PageProvider.java:296)
> at
> org.apache.wicket.core.request.handler.PageProvider.resolvePageInstance(PageProvider.java:261)
> at
> org.apache.wicket.core.request.handler.PageProvider.getPageInstance(PageProvider.java:166)
> at
> org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.getPage(ListenerInterfaceRequestHandler.java:96)
> at
> org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:157)
> at
> org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:862)
> at
> org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
> at
> org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:261)
> at
> org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:218)
> at
> org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
> at
> org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)
> at
> org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:201)
> at
> org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:282)
> at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1548)
> at
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:524) at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
> at
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:568)
> at
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:221)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1110)
> at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:453)
> at
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:183)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1044)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
> at
> org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:199)
> at
> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:109)
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
> at
> org.eclipse.jetty.server.handler.StatisticsHandler.handle(StatisticsHandler.java:159)
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
> at org.eclipse.jetty.server.Server.handle(Server.java:459) at
> org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:280) at
> org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:229)
> at org.eclipse.jetty.io.AbstractConnection$1.run(AbstractConnection.java:505)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:607)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:536)
> at java.lang.Thread.run(Thread.java:722)
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