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  1. XWiki Platform
  2. XWIKI-16080

Possible nullpointer when loading for the first time an async and cached panel listed several times in the panels configuration

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 10.11, 11.0
    • Fix Version/s: 11.1-rc-1, 10.11.3
    • Component/s: Rendering - Async
    • Labels:
    • Environment:
      Windows 10 Pro 64 bit, Chrome 71, using a local instance XWiki 10.11.2 on MySQL 5.7
    • Difficulty:
      Unknown
    • Documentation:
      N/A
    • Documentation in Release Notes:
      N/A
    • Similar issues:

      Description

      STEPS TO REPRODUCE:

      1. Log in as Admin
      2. Go to Administer Wiki > Look & Feel > Panels > Page Layout Tab
      3. Set the 'Panels displayed on the right' to 'Panels.Applications'
      4. Click 'Save'
      5. Go to http://127.0.0.1:8080/xwiki/bin/edit/Panels/Applications?&force=1 and click "Save&View"

      EXPECTED RESULTS

      The panel 'Panels.Applications' is properly displayed on the right side column.

      ACTUAL RESULTS:

      An error is displayed in the panel's place:

      Failed to execute UIX with id [xwiki:Panels.Applications]. Cause: [null]. Click on this message for details.

      Here is the contained stacktrace:

      java.lang.NullPointerException
      	at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor.execute(DefaultBlockAsyncRendererExecutor.java:138)
      	at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor.execute(DefaultBlockAsyncRendererExecutor.java:107)
      	at org.xwiki.uiextension.internal.AbstractWikiUIExtension.execute(AbstractWikiUIExtension.java:112)
      	at sun.reflect.GeneratedMethodAccessor211.invoke(Unknown Source)
      	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      	at java.lang.reflect.Method.invoke(Unknown Source)
      	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
      	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
      	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
      	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
      	at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:567)
      	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:151)
      	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
      	at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369)
      	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
      	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
      	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
      	at org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:420)
      	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
      	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
      	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
      	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
      	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259)
      	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222)
      	at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:358)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:847)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:723)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.lambda$renderFromSkin$0(InternalTemplateManager.java:698)
      	at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:697)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:676)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:662)
      	at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78)
      	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2290)
      	at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2268)
      	at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:992)
      	at sun.reflect.GeneratedMethodAccessor190.invoke(Unknown Source)
      	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      	at java.lang.reflect.Method.invoke(Unknown Source)
      	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
      	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
      	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
      	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
      	at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369)
      	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
      	at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)
      	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)
      	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)
      	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
      	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
      	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259)
      	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222)
      	at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:358)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:847)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:723)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.lambda$renderFromSkin$0(InternalTemplateManager.java:698)
      	at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:697)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:676)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:662)
      	at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78)
      	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2290)
      	at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2268)
      	at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:992)
      	at sun.reflect.GeneratedMethodAccessor190.invoke(Unknown Source)
      	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      	at java.lang.reflect.Method.invoke(Unknown Source)
      	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
      	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
      	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
      	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
      	at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369)
      	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
      	at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)
      	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)
      	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)
      	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
      	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
      	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259)
      	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222)
      	at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:358)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:847)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:723)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.lambda$renderFromSkin$0(InternalTemplateManager.java:698)
      	at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:697)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:676)
      	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:662)
      	at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78)
      	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2290)
      	at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:179)
      	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:489)
      	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:210)
      	at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
      	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
      	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
      	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
      	at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
      	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
      	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:860)
      	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650)
      	at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:112)
      	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
      	at org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:109)
      	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
      	at org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
      	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
      	at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
      	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
      	at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
      	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
      	at org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:134)
      	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1629)
      	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533)
      	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.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
      	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:190)
      	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)
      	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)
      	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)
      	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168)
      	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)
      	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)
      	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166)
      	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155)
      	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
      	at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:219)
      	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126)
      	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
      	at org.eclipse.jetty.server.Server.handle(Server.java:530)
      	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:347)
      	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:256)
      	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
      	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)
      	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
      	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:247)
      	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:140)
      	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
      	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:382)
      	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:708)
      	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626)
      	at java.lang.Thread.run(Unknown Source)

      If the page is refreshed several times, the panel is displayed properly. It seems the error is displayed every time after the panels configuration is saved and/or if the XWiki instance is restarted. No errors in console.

      The issue could not be reproduced on XWiki 10.10.

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            • Assignee:
              tmortagne Thomas Mortagne
              Reporter:
              iandriuta Ilie Andriuta
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              2 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved:
                Date of First Response: