DefaultExceptionMapper Error in the gateway log

Hi Everyone,

I’ve been seeing a bunch of “defaultexceptionmapper” error in the gateway log (Ignition 7.9).
if you expand the error details you’ll see these error details. Any help would be much appreciated.

org.apache.wicket.WicketRuntimeException: Exception in rendering component: [HtmlHeaderContainer [Component id = _header_0]]

at org.apache.wicket.Component.internalRenderComponent(Component.java:2562)

at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1491)

at org.apache.wicket.Component.internalRender(Component.java:2365)

at org.apache.wicket.Component.render(Component.java:2293)

at org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1388)

at org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1553)

at org.apache.wicket.Page.onRender(Page.java:884)

at org.apache.wicket.markup.html.WebPage.onRender(WebPage.java:142)

at org.apache.wicket.Component.internalRender(Component.java:2365)

at org.apache.wicket.Component.render(Component.java:2293)

at org.apache.wicket.Page.renderPage(Page.java:1021)

at org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:116)

at org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:244)

at org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:165)

at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:814)

at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)

at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:253)

at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:210)

at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:281)

at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:188)

at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:245)

at com.inductiveautomation.ignition.gateway.bootstrap.SRFilter.doFilter(SRFilter.java:80)

at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1596)

at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:545)

at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)

at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:590)

at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)

at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)

at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1607)

at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)

at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1297)

at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)

at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:485)

at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1577)

at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)

at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1212)

at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)

at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:59)

at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)

at org.eclipse.jetty.server.Server.handle(Server.java:500)

at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383)

at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:547)

at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375)

at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:270)

at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)

at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)

at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.onFillable(SslConnection.java:543)

at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:398)

at org.eclipse.jetty.io.ssl.SslConnection$2.succeeded(SslConnection.java:161)

at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)

at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)

at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336)

at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313)

at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171)

at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:129)

at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:388)

at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806)

at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938)

at java.lang.Thread.run(Unknown Source)

Caused by: java.lang.NullPointerException: null

at com.inductiveautomation.ignition.gateway.web.pages.BasePage.renderHead(BasePage.java:204)

at org.apache.wicket.Component.renderHead(Component.java:4428)

at org.apache.wicket.Component.renderHead(Component.java:2688)

at org.apache.wicket.markup.renderStrategy.AbstractHeaderRenderStrategy.renderRootComponent(AbstractHeaderRenderStrategy.java:127)

at org.apache.wicket.markup.renderStrategy.ChildFirstHeaderRenderStrategy.renderHeader(ChildFirstHeaderRenderStrategy.java:60)

at org.apache.wicket.markup.html.internal.HtmlHeaderContainer.onComponentTagBody(HtmlHeaderContainer.java:170)

at org.apache.wicket.markup.html.panel.DefaultMarkupSourcingStrategy.onComponentTagBody(DefaultMarkupSourcingStrategy.java:71)

at org.apache.wicket.Component.internalRenderComponent(Component.java:2535)

… 58 common frames omitted