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Posted to commits@wicket.apache.org by "ASF subversion and git services (JIRA)" <ji...@apache.org> on 2017/10/14 13:18:00 UTC
[jira] [Commented] (WICKET-6481) NullPointerException in
MountedMapper
[ https://issues.apache.org/jira/browse/WICKET-6481?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16204630#comment-16204630 ]
ASF subversion and git services commented on WICKET-6481:
---------------------------------------------------------
Commit e4f89ca9979af7af05efaf66dea344936d06b943 in wicket's branch refs/heads/master from [~bitstorm]
[ https://git-wip-us.apache.org/repos/asf?p=wicket.git;h=e4f89ca ]
WICKET-6481 null-safe equals to check page class
> NullPointerException in MountedMapper
> -------------------------------------
>
> Key: WICKET-6481
> URL: https://issues.apache.org/jira/browse/WICKET-6481
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 8.0.0-M7
> Environment: Linux 4.9.0-3-amd64 #1 SMP Debian 4.9.30-2+deb9u5 (2017-09-19) x86_64 GNU/Linux
> Java 8u144
> Tomcat 9.0.1
> Reporter: Lars Eberle
> Assignee: Andrea Del Bene
>
> In case users open bookmarked deep links (including page version) or the page currently displayed expired, in some cases there are NPEs in the MountedMapper:
> {noformat}
> 09:48:55,229-[ajp-nio-8154-exec-6] ERROR -ErrorPage - java.lang.NullPointerException
> at org.apache.wicket.core.request.mapper.MountedMapper.checkPageClass(MountedMapper.java:256)
> at org.apache.wicket.core.request.mapper.AbstractBookmarkableMapper.mapHandler(AbstractBookmarkableMapper.java:400)
> at org.apache.wicket.core.request.mapper.MountedMapper.mapHandler(MountedMapper.java:154)
> at org.apache.wicket.request.mapper.CompoundRequestMapper.mapHandler(CompoundRequestMapper.java:210)
> at org.apache.wicket.request.cycle.RequestCycle.mapUrlFor(RequestCycle.java:449)
> at org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:186)
> at org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:202)
> at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:912)
> at org.apache.wicket.request.RequestHandlerExecutor.execute(RequestHandlerExecutor.java:65)
> at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:283)
> at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:253)
> at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:221)
> at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:262)
> at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:204)
> at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:286)
> at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
> at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:230)
> at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:106)
> at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
> at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at de.bps.blok.utils.NoJSessionIdInUrlFilter.doFilter(NoJSessionIdInUrlFilter.java:44)
> at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
> at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
> at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
> at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
> at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
> at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
> at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
> at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
> at org.apache.coyote.ajp.AbstractAjpProcessor.process(AbstractAjpProcessor.java:844)
> at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668)
> at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1527)
> at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1484)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
> Reason seems to be in PageProvider.getPageClass(). This may return null if hasPageInstance() returns false. In that case a NPE is thrown as shown in the stacktrace.
> *Example:*
> Mounting:
> {code:java}
> mount(new MountedMapper("page/${page}", BlokPage.class));
> {code}
> Request logger:
> {noformat}
> 09:48:55,246-[ajp-nio-8154-exec-6] INFO -RequestLogger -startTime="2017-10-05 07:48:55,093",duration=153,url="https://server/path/page/home?1",event={handler=RenderPageRequestHandler,data={pageId=1,pageParameters={null},renderCount=null}},response={handler=RenderPageRequestHandler,data={pageClass=de.bps.blok.page.simple.ErrorPage,pageId=0,pageParameters={},renderCount=0}},sessionid="A5527CCEAEE7334A805F9EF09D30A7BB",sessionsize=2710,sessioninfo={;page/home?1},sessionstart="2017-10-05 07:48:55,231",requests=2,totaltime=153,activerequests=0,maxmem=2147M,total=1073M,used=198M
> {noformat}
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