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https://issues.apache.org/jira/browse/ISIS-1482?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dan Haywood resolved ISIS-1482.
-------------------------------
Resolution: Fixed
> Occasional(?) exception in i18n PoWriter, looks like a concurrent access
> problem
> --------------------------------------------------------------------------------
>
> Key: ISIS-1482
> URL: https://issues.apache.org/jira/browse/ISIS-1482
> Project: Isis
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.13.0
> Reporter: Dan Haywood
> Assignee: Dan Haywood
> Priority: Minor
> Fix For: 1.13.1
>
> Attachments: screenshot-1.png
>
>
> Did not manifest in the UI, but present as a stacktrace (below).
> This SO article
> [http://stackoverflow.com/questions/37048084/is-this-null-pointer-exception-in-treemap-due-to-concurrent-access]
> suggests concurrent exception.
> Fix probably to introduce the 'synchronized' keyword at some judicious point.
> stacktrace:
> {code}
> 00:05:59,617 [RequestCycleExtra ] ********************************
> 00:05:59,617 [RequestCycleExtra ] Handling the following exception
> org.apache.wicket.WicketRuntimeException: Exception in rendering component:
> [MessageContainer [Component id = _message_5]]
> at
> org.apache.wicket.Component.internalRenderComponent(Component.java:2560)
> at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1496)
> at org.apache.wicket.Component.internalRender(Component.java:2366)
> at org.apache.wicket.Component.render(Component.java:2294)
> at
> org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1392)
> at
> org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1557)
> at
> org.apache.wicket.MarkupContainer.renderComponentTagBody(MarkupContainer.java:1532)
> at
> org.apache.wicket.MarkupContainer.onComponentTagBody(MarkupContainer.java:1487)
> at
> org.apache.wicket.markup.html.panel.DefaultMarkupSourcingStrategy.onComponentTagBody(DefaultMarkupSourcingStrategy.java:71)
> at
> org.apache.wicket.Component.internalRenderComponent(Component.java:2536)
> at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1496)
> at org.apache.wicket.Component.internalRender(Component.java:2366)
> at org.apache.wicket.Component.render(Component.java:2294)
> at
> org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1392)
> at
> org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1557)
> at
> org.apache.wicket.MarkupContainer.renderComponentTagBody(MarkupContainer.java:1532)
> at
> org.apache.wicket.MarkupContainer.onComponentTagBody(MarkupContainer.java:1487)
> at
> org.apache.wicket.markup.html.form.Form.onComponentTagBody(Form.java:1743)
> at
> org.apache.wicket.markup.html.panel.DefaultMarkupSourcingStrategy.onComponentTagBody(DefaultMarkupSourcingStrategy.java:71)
> at
> org.apache.wicket.Component.internalRenderComponent(Component.java:2536)
> at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1496)
> at org.apache.wicket.Component.internalRender(Component.java:2366)
> at org.apache.wicket.Component.render(Component.java:2294)
> at
> org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1392)
> at
> org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1557)
> at
> org.apache.wicket.MarkupContainer.renderComponentTagBody(MarkupContainer.java:1532)
> at
> org.apache.wicket.MarkupContainer.renderAssociatedMarkup(MarkupContainer.java:689)
> at
> org.apache.wicket.markup.html.panel.AssociatedMarkupSourcingStrategy.renderAssociatedMarkup(AssociatedMarkupSourcingStrategy.java:76)
> at
> org.apache.wicket.markup.html.panel.PanelMarkupSourcingStrategy.onComponentTagBody(PanelMarkupSourcingStrategy.java:112)
> at
> org.apache.wicket.Component.internalRenderComponent(Component.java:2536)
> at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1496)
> at org.apache.wicket.Component.internalRender(Component.java:2366)
> at org.apache.wicket.Component.render(Component.java:2294)
> at
> org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1392)
> at
> org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1557)
> at
> org.apache.wicket.MarkupContainer.renderComponentTagBody(MarkupContainer.java:1532)
> at
> org.apache.wicket.MarkupContainer.onComponentTagBody(MarkupContainer.java:1487)
> at
> org.apache.wicket.markup.html.panel.DefaultMarkupSourcingStrategy.onComponentTagBody(DefaultMarkupSourcingStrategy.java:71)
> at
> org.apache.wicket.Component.internalRenderComponent(Component.java:2536)
> at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1496)
> at org.apache.wicket.Component.internalRender(Component.java:2366)
> at org.apache.wicket.Component.render(Component.java:2294)
> at
> org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1392)
> at
> org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1557)
> at
> org.apache.wicket.MarkupContainer.renderComponentTagBody(MarkupContainer.java:1532)
> at
> org.apache.wicket.MarkupContainer.onComponentTagBody(MarkupContainer.java:1487)
> at
> org.apache.wicket.markup.html.panel.DefaultMarkupSourcingStrategy.onComponentTagBody(DefaultMarkupSourcingStrategy.java:71)
> at
> org.apache.wicket.Component.internalRenderComponent(Component.java:2536)
> at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1496)
> at org.apache.wicket.Component.internalRender(Component.java:2366)
> at org.apache.wicket.Component.render(Component.java:2294)
> at
> org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1392)
> at
> org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1557)
> at org.apache.wicket.Page.onRender(Page.java:887)
> at org.apache.wicket.markup.html.WebPage.onRender(WebPage.java:143)
> at org.apache.wicket.Component.internalRender(Component.java:2366)
> at org.apache.wicket.Component.render(Component.java:2294)
> at org.apache.wicket.Page.renderPage(Page.java:1024)
> at
> org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:139)
> at
> org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:229)
> at
> org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:175)
> at
> org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:890)
> at
> org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
> at
> org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:261)
> at
> org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:218)
> at
> org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
> at
> org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)
> at
> org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:201)
> at
> org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:282)
> at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1668)
> at
> org.apache.isis.core.webapp.diagnostics.IsisLogOnExceptionFilter.doFilter(IsisLogOnExceptionFilter.java:52)
> at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1668)
> at
> org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)
> at
> org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)
> at
> org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
> at
> org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
> at
> org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)
> at
> org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)
> at
> org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
> at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1668)
> at
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:581)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
> at
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
> at
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1158)
> at
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
> at
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1090)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:119)
> at org.eclipse.jetty.server.Server.handle(Server.java:517)
> at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:308)
> at
> org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:242)
> at
> org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:261)
> at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
> at
> org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:75)
> at
> org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:213)
> at
> org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:147)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.RuntimeException: An error occurred while executing code
> in a temporary session
> at
> org.apache.isis.core.runtime.system.session.IsisSessionFactory.doInSession(IsisSessionFactory.java:349)
> at
> org.apache.isis.core.runtime.system.session.IsisSessionFactory.doInSession(IsisSessionFactory.java:327)
> at
> org.apache.isis.viewer.wicket.viewer.integration.wicket.LocalizerForIsis.translate(LocalizerForIsis.java:75)
> at
> org.apache.isis.viewer.wicket.viewer.integration.wicket.LocalizerForIsis.getString(LocalizerForIsis.java:62)
> at org.apache.wicket.Localizer.getString(Localizer.java:201)
> at org.apache.wicket.Localizer.getString(Localizer.java:150)
> at
> org.apache.wicket.markup.resolver.WicketMessageResolver$MessageContainer.onComponentTagBody(WicketMessageResolver.java:203)
> at
> org.apache.wicket.markup.html.panel.DefaultMarkupSourcingStrategy.onComponentTagBody(DefaultMarkupSourcingStrategy.java:71)
> at
> org.apache.wicket.Component.internalRenderComponent(Component.java:2536)
> ... 100 more
> Caused by: java.lang.NullPointerException
> at java.util.TreeMap.rotateLeft(TreeMap.java:2224)
> at java.util.TreeMap.fixAfterInsertion(TreeMap.java:2291)
> at java.util.TreeMap.put(TreeMap.java:582)
> at
> org.apache.isis.core.runtime.services.i18n.po.PoWriter.blockFor(PoWriter.java:143)
> at
> org.apache.isis.core.runtime.services.i18n.po.PoWriter.translate(PoWriter.java:120)
> at
> org.apache.isis.core.runtime.services.i18n.po.TranslationServicePo.translate(TranslationServicePo.java:103)
> at
> org.apache.isis.viewer.wicket.viewer.integration.wicket.LocalizerForIsis.translate(LocalizerForIsis.java:144)
> at
> org.apache.isis.viewer.wicket.viewer.integration.wicket.LocalizerForIsis.access$000(LocalizerForIsis.java:45)
> at
> org.apache.isis.viewer.wicket.viewer.integration.wicket.LocalizerForIsis$1.call(LocalizerForIsis.java:78)
> at
> org.apache.isis.viewer.wicket.viewer.integration.wicket.LocalizerForIsis$1.call(LocalizerForIsis.java:75)
> at
> org.apache.isis.core.runtime.system.session.IsisSessionFactory.doInSession(IsisSessionFactory.java:347)
> ... 108 more
> {code}
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