# Applications

Last modified by Sergey Lebedev on 2019/07/13 19:08
Export
Office Formats
Export as PDF Export as ODT Export as RTF
Other Formats

Select the pages to export:

select all/ none

Legend:
  Created Page
  Modified Extension Page
  Clean Extension Page

Export as HTML

## Create your application

Define the structure of your data, customize it and create the application you want.

App Within Minutes helps you build applications without having technical knowledge.

Try it! Demo
Create your application

## Browse applications

Choose from community contributed applications and install them inside your wiki.

Extension Manager helps you manage (install, update, uninstall) your applications.

Browse
Browse applications

## Examples

Need help or confused with some of our applications? Check out their documentation and find out more about their functionality.

Blog

Blog Application allows you to publish your information and share it to the world.

Forum

Forum Application allows you to create new categories and discuss topics within them.

Menu

Menu Application helps you create navigation menus and displayed them in your instance.

Ideas

Ideas Application encourage you to submit ideas that can be voted by your team.

Meetings

Meetings Application manages your meetings mentioning the date, location, participants, etc.

File Manager

File Manager manages your files, providing a viewer of supported files, tag cloud and allowing filtering.

View more applications

Tags:
Created by Sergey Lebedev on 2017/01/20 12:33

# Applications

Failed to execute the [velocity] macro. Cause: [xwiki-mysql-db]. Click on this message for details.

    org.xwiki.rendering.macro.MacroExecutionException: Failed to evaluate Velocity Macro for content [#panelheader($services.localization.render('xe.panels.navigation'))
    ## Escape special characters in macro parameter values.
    #set ($openToDoc = $doc.documentReference.toString().replaceAll('([~"])', '~$1'))
    ## Apply the configured page exclusions.
    #set ($config = $xwiki.getDocument('PanelsCode.NavigationConfiguration'))
    #set ($exclusions = $collectionstool.set)
    #set ($defaultDocumentName = $services.model.getEntityReference('DOCUMENT', 'default').name)
    ## Exclude top level extension pages.
    #if ($config.getValue('excludeTopLevelExtensionPages') == 1)
      #set ($query = $services.query.hql('select space.name from XWikiSpace space where space.parent is null'))
      #set ($discard = $query.addFilter('hidden/space'))
      #foreach ($result in $query.execute())
        #set ($documentReference = $services.model.createDocumentReference($NULL, $result, $defaultDocumentName))
        #set ($installedExtensions = $services.extension.xar.getInstalledExtensions($documentReference))
        #if ($installedExtensions && $installedExtensions.size() > 0
            && !$services.extension.xar.isEditAllowed($documentReference))
          #set ($discard = $exclusions.add("document:$documentReference"))
        #end
      #end
    #end
    ## Exclude top level application pages.
    #if ($config.getValue('excludeTopLevelApplicationPages') == 1)
      #set ($statement = 'select space.name '
        + 'from XWikiSpace as space, Document as doc, doc.object(AppWithinMinutes.LiveTableClass) as app '
        + 'where space.parent is null and doc.space = space.reference')
      #set ($query = $services.query.xwql($statement).addFilter('hidden/space'))
      #foreach ($result in $query.execute())
        #set ($documentReference = $services.model.createDocumentReference($NULL, $result, $defaultDocumentName))
        #set ($discard = $exclusions.add("document:$documentReference"))
      #end
    #end
    ## Inclusions are treated as exceptions to the dynamic exclusion filters.
    #if ($config.getValue('excludeTopLevelExtensionPages') == 1 || $config.getValue('excludeTopLevelApplicationPages') == 1)
      ## FIXME: This panel is cached and the cache is not invalidated by default when an extension is installed or
      ## uninstalled and neither when an application is created, deleted or renamed. Ideally we should invalidate the cache
      ## whenever a top level page is created or modified but we can't do this ATM so the next best thing is to invalidate
      ## the cache whenever a page (anywhere in the page hierarchy) is modified.
      #set ($discard = $services.async.useEntity("wiki:$xcontext.database"))
      #foreach ($inclusion in $config.getValue('inclusions'))
        #set ($documentReference = $services.model.resolveDocument($inclusion))
        #set ($discard = $exclusions.remove("document:$documentReference"))
      #end
    #end
    ## Other page exclusions.
    #foreach ($exclusion in $config.getValue('exclusions'))
      #set ($documentReference = $services.model.resolveDocument($exclusion))
      #set ($discard = $exclusions.add("document:$documentReference"))
    #end
    #set ($exclusions = $stringtool.join($exclusions, ','))
    {{documentTree showTranslations="false" showAttachments="false" compact="true" openTo="document:$openToDoc"
      exclusions="$exclusions" /}}
    #panelfooter()]
    	at org.xwiki.rendering.internal.macro.velocity.VelocityMacro.evaluateString(VelocityMacro.java:139)
    	at org.xwiki.rendering.internal.macro.velocity.VelocityMacro.evaluateString(VelocityMacro.java:52)
    	at org.xwiki.rendering.macro.script.AbstractScriptMacro.evaluateBlock(AbstractScriptMacro.java:286)
    	at org.xwiki.rendering.macro.script.AbstractScriptMacro.execute(AbstractScriptMacro.java:182)
    	at org.xwiki.rendering.macro.script.AbstractScriptMacro.execute(AbstractScriptMacro.java:58)
    	at org.xwiki.rendering.internal.transformation.macro.MacroTransformation.transform(MacroTransformation.java:297)
    	at org.xwiki.rendering.internal.transformation.DefaultRenderingContext.transformInContext(DefaultRenderingContext.java:183)
    	at org.xwiki.rendering.internal.transformation.DefaultTransformationManager.performTransformations(DefaultTransformationManager.java:101)
    	at org.xwiki.rendering.async.internal.block.AbstractBlockAsyncRenderer.transform(AbstractBlockAsyncRenderer.java:74)
    	at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRenderer.tranform(DefaultBlockAsyncRenderer.java:143)
    	at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRenderer.execute(DefaultBlockAsyncRenderer.java:126)
    	at org.xwiki.rendering.async.internal.block.AbstractBlockAsyncRenderer.render(AbstractBlockAsyncRenderer.java:157)
    	at org.xwiki.rendering.async.internal.block.AbstractBlockAsyncRenderer.render(AbstractBlockAsyncRenderer.java:54)
    	at org.xwiki.panels.internal.PanelWikiUIExtension.render(PanelWikiUIExtension.java:131)
    	at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor$DecoratorWrapper.render(DefaultBlockAsyncRendererExecutor.java:67)
    	at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor$DecoratorWrapper.render(DefaultBlockAsyncRendererExecutor.java:49)
    	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.lambda$syncRender$0(DefaultAsyncRendererExecutor.java:264)
    	at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98)
    	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.syncRender(DefaultAsyncRendererExecutor.java:264)
    	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.render(DefaultAsyncRendererExecutor.java:229)
    	at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor.execute(DefaultBlockAsyncRendererExecutor.java:125)
    	at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor.execute(DefaultBlockAsyncRendererExecutor.java:113)
    	at org.xwiki.uiextension.internal.AbstractWikiUIExtension.execute(AbstractWikiUIExtension.java:112)
    	at sun.reflect.GeneratedMethodAccessor238.invoke(Unknown Source)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:498)
    	at org.apache.velocity.util.introspection.UberspectImpl$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:264)
    	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:224)
    	at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:358)
    	at com.xpn.xwiki.internal.template.VelocityTemplateEvaluator.evaluateContent(VelocityTemplateEvaluator.java:95)
    	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.evaluateContent(TemplateAsyncRenderer.java:217)
    	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.renderVelocity(TemplateAsyncRenderer.java:180)
    	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:137)
    	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:53)
    	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.lambda$syncRender$0(DefaultAsyncRendererExecutor.java:264)
    	at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98)
    	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.syncRender(DefaultAsyncRendererExecutor.java:264)
    	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.render(DefaultAsyncRendererExecutor.java:247)
    	at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor.render(DefaultBlockAsyncRendererExecutor.java:154)
    	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:772)
    	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:745)
    	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:725)
    	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:711)
    	at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78)
    	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2490)
    	at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2468)
    	at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:983)
    	at sun.reflect.GeneratedMethodAccessor209.invoke(Unknown Source)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:498)
    	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
    	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
    	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
    	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
    	at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369)
    	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
    	at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)
    	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)
    	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)
    	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
    	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
    	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:264)
    	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:224)
    	at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:358)
    	at com.xpn.xwiki.internal.template.VelocityTemplateEvaluator.evaluateContent(VelocityTemplateEvaluator.java:95)
    	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.evaluateContent(TemplateAsyncRenderer.java:217)
    	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.renderVelocity(TemplateAsyncRenderer.java:180)
    	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:137)
    	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:53)
    	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.lambda$syncRender$0(DefaultAsyncRendererExecutor.java:264)
    	at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98)
    	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.syncRender(DefaultAsyncRendererExecutor.java:264)
    	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.render(DefaultAsyncRendererExecutor.java:247)
    	at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor.render(DefaultBlockAsyncRendererExecutor.java:154)
    	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:772)
    	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:745)
    	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:725)
    	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:711)
    	at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78)
    	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2490)
    	at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2468)
    	at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:983)
    	at sun.reflect.GeneratedMethodAccessor209.invoke(Unknown Source)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:498)
    	at org.apache.velocity.util.introspection.UberspectImpl$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.ASTBlock.render(ASTBlock.java:72)
    	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
    	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106)
    	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
    	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:264)
    	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:224)
    	at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:358)
    	at com.xpn.xwiki.internal.template.VelocityTemplateEvaluator.evaluateContent(VelocityTemplateEvaluator.java:95)
    	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.evaluateContent(TemplateAsyncRenderer.java:217)
    	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.renderVelocity(TemplateAsyncRenderer.java:180)
    	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:137)
    	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:53)
    	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.lambda$syncRender$0(DefaultAsyncRendererExecutor.java:264)
    	at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98)
    	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.syncRender(DefaultAsyncRendererExecutor.java:264)
    	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.render(DefaultAsyncRendererExecutor.java:247)
    	at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor.render(DefaultBlockAsyncRendererExecutor.java:154)
    	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:772)
    	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:745)
    	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:725)
    	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:711)
    	at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78)
    	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2490)
    	at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:179)
    	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:512)
    	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:218)
    	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:635)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    	at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:112)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    	at org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:109)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    	at org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    	at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    	at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    	at org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
    	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
    	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
    	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
    	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:660)
    	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
    	at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:679)
    	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
    	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:798)
    	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:806)
    	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498)
    	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    	at java.lang.Thread.run(Thread.java:748)
    Caused by: org.xwiki.velocity.XWikiVelocityException: Failed to evaluate content with id [xwiki:Panels.Navigation]
    	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:229)
    	at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:358)
    	at org.xwiki.rendering.internal.macro.velocity.VelocityMacro.evaluateString(VelocityMacro.java:131)
    	... 180 more
    Caused by: org.apache.velocity.exception.MethodInvocationException: Invocation of method 'execute' in  class org.xwiki.query.internal.ScriptQuery threw exception org.xwiki.query.QueryException: Exception while executing query. Query statement = [ select space.name from XWikiSpace as space , XWikiDocument as doc , BaseObject as app where ( space.parent is null and doc.space = space.reference ) and doc.fullName=app.name and app.className='AppWithinMinutes.LiveTableClass' ] at 4750:xwiki:Panels.Navigation[line 27, column 29]
    	at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:243)
    	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:187)
    	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.directive.Foreach.render(Foreach.java:318)
    	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:264)
    	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:224)
    	... 182 more
    Caused by: org.xwiki.query.QueryException: Exception while executing query. Query statement = [ select space.name from XWikiSpace as space , XWikiDocument as doc , BaseObject as app where ( space.parent is null and doc.space = space.reference ) and doc.fullName=app.name and app.className='AppWithinMinutes.LiveTableClass' ]
    	at com.xpn.xwiki.store.hibernate.query.HqlQueryExecutor.execute(HqlQueryExecutor.java:176)
    	at org.xwiki.query.internal.DefaultQueryExecutorManager.execute(DefaultQueryExecutorManager.java:72)
    	at org.xwiki.query.internal.DefaultQuery.execute(DefaultQuery.java:306)
    	at org.xwiki.query.xwql.internal.XWQLQueryExecutor.execute(XWQLQueryExecutor.java:124)
    	at org.xwiki.query.internal.DefaultQueryExecutorManager.execute(DefaultQueryExecutorManager.java:72)
    	at org.xwiki.query.internal.SecureQueryExecutorManager.execute(SecureQueryExecutorManager.java:67)
    	at org.xwiki.query.internal.DefaultQuery.execute(DefaultQuery.java:306)
    	at org.xwiki.query.internal.ScriptQuery.execute(ScriptQuery.java:252)
    	at sun.reflect.GeneratedMethodAccessor428.invoke(Unknown Source)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:498)
    	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
    	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
    	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
    	... 191 more
    Caused by: com.xpn.xwiki.XWikiException: Error number 0 in 3: Exception while hibernate execute
    	at com.xpn.xwiki.store.XWikiHibernateBaseStore.execute(XWikiHibernateBaseStore.java:826)
    	at com.xpn.xwiki.store.XWikiHibernateBaseStore.executeRead(XWikiHibernateBaseStore.java:889)
    	at com.xpn.xwiki.store.hibernate.query.HqlQueryExecutor.execute(HqlQueryExecutor.java:164)
    	... 204 more
    Caused by: org.hibernate.exception.JDBCConnectionException: Unable to acquire JDBC Connection
    	at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:112)
    	at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42)
    	at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113)
    	at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:99)
    	at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:107)
    	at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getPhysicalConnection(LogicalConnectionManagedImpl.java:134)
    	at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getConnectionForTransactionManagement(LogicalConnectionManagedImpl.java:250)
    	at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.begin(LogicalConnectionManagedImpl.java:258)
    	at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.begin(JdbcResourceLocalTransactionCoordinatorImpl.java:246)
    	at org.hibernate.engine.transaction.internal.TransactionImpl.begin(TransactionImpl.java:83)
    	at org.hibernate.internal.AbstractSharedSessionContract.beginTransaction(AbstractSharedSessionContract.java:467)
    	at org.hibernate.engine.spi.SessionDelegatorBaseImpl.beginTransaction(SessionDelegatorBaseImpl.java:486)
    	at com.xpn.xwiki.internal.store.hibernate.HibernateStore.beginTransaction(HibernateStore.java:811)
    	at com.xpn.xwiki.internal.store.hibernate.HibernateStore.beginTransaction(HibernateStore.java:762)
    	at com.xpn.xwiki.store.XWikiHibernateBaseStore.beginTransaction(XWikiHibernateBaseStore.java:532)
    	at com.xpn.xwiki.store.XWikiHibernateBaseStore.execute(XWikiHibernateBaseStore.java:819)
    	... 206 more
    Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

    The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
    	at sun.reflect.GeneratedConstructorAccessor427.newInstance(Unknown Source)
    	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    	at com.mysql.jdbc.Util.handleNewInstance(Util.java:403)
    	at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:990)
    	at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:335)
    	at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2188)
    	at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2220)
    	at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2015)
    	at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:768)
    	at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
    	at sun.reflect.GeneratedConstructorAccessor240.newInstance(Unknown Source)
    	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    	at com.mysql.jdbc.Util.handleNewInstance(Util.java:403)
    	at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:385)
    	at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:323)
    	at org.apache.commons.dbcp2.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:55)
    	at org.apache.commons.dbcp2.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:355)
    	at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:889)
    	at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:424)
    	at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:349)
    	at org.apache.commons.dbcp2.PoolingDataSource.getConnection(PoolingDataSource.java:134)
    	at org.apache.commons.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:753)
    	at com.xpn.xwiki.store.DBCPConnectionProvider.getConnection(DBCPConnectionProvider.java:254)
    	at org.hibernate.internal.NonContextualJdbcConnectionAccess.obtainConnection(NonContextualJdbcConnectionAccess.java:38)
    	at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:104)
    	... 217 more
    Caused by: java.net.UnknownHostException: xwiki-mysql-db
    	at java.net.InetAddress.getAllByName0(InetAddress.java:1281)
    	at java.net.InetAddress.getAllByName(InetAddress.java:1193)
    	at java.net.InetAddress.getAllByName(InetAddress.java:1127)
    	at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:188)
    	at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:299)
    	... 238 more

# Tips

If you're a new XWiki user, check out the Getting Started Guide.

# My Recent Modifications

- XWikiKateGroup
- XWikiCanonGroup

# Need help?

If you need help with XWiki you can contact:

- Community Support
- Professional Support

XWiki 11.10.13