# Applications

Last modified by Sergey Lebedev on 2019/07/13 19:08
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## 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

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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

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