org.xwiki.rendering.macro.MacroExecutionException: Failed to evaluate Velocity Macro for content [##
## tagCloudSpace - the space to display the tag cloud for. If blank, display cloud for the whole wiki. Default is blank.
#set ($tagCloudSpace = $xcontext.macro.params.get('space'))
#set ($tagCloudSpaces = $xcontext.macro.params.get('spaces'))
##
## Configurable popularity levels. You must enter an even number of levels. Default: 6.
#set ($popularityLevels = ["notPopular", "notVeryPopular", "somewhatPopular", "popular", "veryPopular", "ultraPopular"])
#set ($levelsHalf = $popularityLevels.size() / 2)
##
$xwiki.ssx.use('XWiki.TagCloud')##
##
#if( $tagCloudSpace && $tagCloudSpaces )
  {{error}}
  ##Do not use space and spaces parameter in the same time.
  {{translation key="xe.tag.paramerror" /}}
  {{/error}}
  #break
#end

##If multiple spaces with "spaces" parameter
#if( $tagCloudSpaces )
  #set ($tagCount = $xwiki.tag.getTagCountForSpaces($tagCloudSpaces))
#else
  ##If only one space
  ## Get tag count map. Key: tag, value: number of occurrences.
  #set ($tagCount = $xwiki.tag.getTagCount("$!tagCloudSpace"))
#end
##
## Only build popularity map if at least one tag exists
#if ($tagCount.size() > 0)
  ##
  ## Store the minimum and maximum number of occurrences.
  #set ($sortedTagCounts = $sorttool.sort($tagCount.values()))
  #set ($maxIndex = $sortedTagCounts.size() - 1)
  #set ($minCount = $sortedTagCounts[0])
  #set ($maxCount = $sortedTagCounts[$maxIndex])
  ##
  ## Calculate the total number of tags in the wiki.
  #set ($totalTagNumber = 0)
  #foreach ($currentTagCount in $sortedTagCounts)
    #set ($totalTagNumber = $totalTagNumber + $currentTagCount)
  #end
  #set ($countAverage = $mathtool.div($totalTagNumber, $tagCount.size()))
  ##
  ## Build popularity map using the difference between minimum / maximum tag occurrences counts, and the average tag occurences count.
  #set ($firstHalfIntervalSize = $mathtool.div($mathtool.sub($countAverage, $minCount), $levelsHalf))
  #set ($secondHalfIntervalSize = $mathtool.div($mathtool.sub($maxCount, $countAverage), $levelsHalf))
  ##
  ## Use a sorted map
  #set ($popularityMap = $collectionstool.getSortedMap())
  #set ($previousPopularityMax = $minCount)
  #set ($intervalSize = $firstHalfIntervalSize)
  #set ($halfPassed = false)
  #foreach ($popularityLevel in $popularityLevels)
    #if ($velocityCount > $levelsHalf && !$halfPassed)
      #set ($intervalSize = $secondHalfIntervalSize)
      #set ($halfPassed = true)
    #end
    #set ($currentPopularityMax = $mathtool.add($previousPopularityMax, $intervalSize))
    ##
    ## round the threshold
    #set ($threshold = $mathtool.roundTo(1, $currentPopularityMax))
    #set ($discard = $popularityMap.put($threshold, $popularityLevel))
    #set ($previousPopularityMax = $currentPopularityMax)
  #end
#end
##
## Display tag cloud.
{{html}}
#if ($tagCount.size() > 0)
  <ol class="tagCloud">
  #foreach ($tagEntry in $tagCount.entrySet())
    #foreach ($popularityEntry in $popularityMap.entrySet())
      #if ($popularityEntry.Key >= $tagEntry.Value)
        #set ($liClass = $popularityEntry.Value)
        #break
      #end
    #end
    <li class="$liClass">
      <a class="tag" href="$xwiki.getURL('Main.Tags', 'view', "do=viewTag&amp;tag=$escapetool.url($tagEntry.Key)")" title="$services.localization.render('xe.tag.tooltip', ["$tagEntry.Value"])">$escapetool.xml($tagEntry.Key)</a>
    </li>
  #end
  </ol>
#else
  <p class="noitems">
  #if("$!tagCloudSpace" == "")
    $services.localization.render('xe.tag.notags')
  #else
    $services.localization.render('xe.tag.notagsforspace', ["$tagCloudSpace"])
  #end
  </p>
#end
{{/html}}]
	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:272)
	at org.xwiki.rendering.internal.transformation.DefaultRenderingContext.transformInContext(DefaultRenderingContext.java:183)
	at org.xwiki.rendering.internal.macro.wikibridge.DefaultWikiMacro.execute(DefaultWikiMacro.java:251)
	at org.xwiki.rendering.internal.macro.wikibridge.DefaultWikiMacro.execute(DefaultWikiMacro.java:62)
	at org.xwiki.rendering.internal.transformation.macro.MacroTransformation.transform(MacroTransformation.java:272)
	at org.xwiki.rendering.internal.executor.MacroContentExecutor.executeContent(MacroContentExecutor.java:77)
	at org.xwiki.rendering.internal.executor.MacroContentExecutor.execute(MacroContentExecutor.java:70)
	at org.xwiki.rendering.internal.executor.MacroContentExecutor.execute(MacroContentExecutor.java:45)
	at org.xwiki.rendering.internal.macro.dashboard.DefaultGadgetSource.renderGadgetProperty(DefaultGadgetSource.java:201)
	at org.xwiki.rendering.internal.macro.dashboard.DefaultGadgetSource.prepareGadgets(DefaultGadgetSource.java:188)
	at org.xwiki.rendering.internal.macro.dashboard.DefaultGadgetSource.getGadgets(DefaultGadgetSource.java:140)
	at org.xwiki.rendering.internal.macro.dashboard.DashboardMacro.execute(DashboardMacro.java:170)
	at org.xwiki.rendering.internal.macro.dashboard.DashboardMacro.execute(DashboardMacro.java:55)
	at org.xwiki.rendering.internal.transformation.macro.MacroTransformation.transform(MacroTransformation.java:272)
	at org.xwiki.rendering.internal.transformation.DefaultRenderingContext.transformInContext(DefaultRenderingContext.java:183)
	at org.xwiki.rendering.internal.transformation.DefaultTransformationManager.performTransformations(DefaultTransformationManager.java:95)
	at org.xwiki.display.internal.DocumentContentDisplayer.display(DocumentContentDisplayer.java:263)
	at org.xwiki.display.internal.DocumentContentDisplayer.display(DocumentContentDisplayer.java:133)
	at org.xwiki.display.internal.DocumentContentDisplayer.display(DocumentContentDisplayer.java:58)
	at org.xwiki.display.internal.DefaultDocumentDisplayer.display(DefaultDocumentDisplayer.java:96)
	at org.xwiki.display.internal.DefaultDocumentDisplayer.display(DefaultDocumentDisplayer.java:39)
	at org.xwiki.sheet.internal.SheetDocumentDisplayer.display(SheetDocumentDisplayer.java:123)
	at org.xwiki.sheet.internal.SheetDocumentDisplayer.display(SheetDocumentDisplayer.java:52)
	at org.xwiki.display.internal.ConfiguredDocumentDisplayer.display(ConfiguredDocumentDisplayer.java:68)
	at org.xwiki.display.internal.ConfiguredDocumentDisplayer.display(ConfiguredDocumentDisplayer.java:42)
	at com.xpn.xwiki.doc.XWikiDocument.display(XWikiDocument.java:1159)
	at com.xpn.xwiki.doc.XWikiDocument.getRenderedContent(XWikiDocument.java:1200)
	at com.xpn.xwiki.doc.XWikiDocument.getRenderedContent(XWikiDocument.java:1177)
	at com.xpn.xwiki.doc.XWikiDocument.getRenderedContent(XWikiDocument.java:1208)
	at com.xpn.xwiki.api.Document.getRenderedContent(Document.java:694)
	at sun.reflect.GeneratedMethodAccessor438.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.ASTExpression.value(ASTExpression.java:71)
	at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:142)
	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.ASTBlock.render(ASTBlock.java:72)
	at org.xwiki.velocity.introspection.TryCatchDirective.render(TryCatchDirective.java:87)
	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:361)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:790)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:667)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:645)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:616)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:602)
	at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:77)
	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2102)
	at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2080)
	at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:886)
	at sun.reflect.GeneratedMethodAccessor173.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:259)
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222)
	at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:361)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:790)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:667)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:645)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:616)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:602)
	at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:77)
	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2102)
	at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2080)
	at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:886)
	at sun.reflect.GeneratedMethodAccessor173.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.ASTIfStatement.render(ASTIfStatement.java:87)
	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:259)
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222)
	at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:361)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:790)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:667)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:645)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:616)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:602)
	at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:77)
	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2102)
	at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:180)
	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:463)
	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:808)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
	at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:112)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
	at org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:127)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
	at org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
	at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
	at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
	at org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:136)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
	at org.eclipse.jetty.server.Server.handle(Server.java:499)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
	at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.xwiki.velocity.XWikiVelocityException: Failed to evaluate content with id [xwiki:Dashboard.WebHome]
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:227)
	at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:361)
	at org.xwiki.rendering.internal.macro.velocity.VelocityMacro.evaluateString(VelocityMacro.java:131)
	... 160 more
Caused by: org.apache.velocity.exception.MethodInvocationException: Invocation of method 'getTagCount' in  class com.xpn.xwiki.plugin.tag.TagPluginApi threw exception com.xpn.xwiki.XWikiException: Error number 0 in 3: Failed to get tag count for query [select elements(prop.list) from XWikiDocument as doc, BaseObject as tagobject, DBStringListProperty as prop where tagobject.name=doc.fullName and tagobject.className='XWiki.TagClass' and tagobject.id=prop.id.id and prop.id.name='tags'], with parameters [[]] at 5125:xwiki:Dashboard.WebHome[line 26, column 30]
	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.parser.node.ASTExpression.value(ASTExpression.java:71)
	at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:142)
	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:259)
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222)
	... 162 more
Caused by: com.xpn.xwiki.XWikiException: Error number 0 in 3: Failed to get tag count for query [select elements(prop.list) from XWikiDocument as doc, BaseObject as tagobject, DBStringListProperty as prop where tagobject.name=doc.fullName and tagobject.className='XWiki.TagClass' and tagobject.id=prop.id.id and prop.id.name='tags'], with parameters [[]]
	at com.xpn.xwiki.plugin.tag.TagQueryUtils.getTagCountForQuery(TagQueryUtils.java:133)
	at com.xpn.xwiki.plugin.tag.TagPlugin.getTagCountForQuery(TagPlugin.java:289)
	at com.xpn.xwiki.plugin.tag.TagPlugin.getTagCountForQuery(TagPlugin.java:271)
	at com.xpn.xwiki.plugin.tag.TagPlugin.getTagCount(TagPlugin.java:184)
	at com.xpn.xwiki.plugin.tag.TagPlugin.getTagCount(TagPlugin.java:214)
	at com.xpn.xwiki.plugin.tag.TagPluginApi.getTagCount(TagPluginApi.java:92)
	at sun.reflect.GeneratedMethodAccessor478.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)
	... 172 more
Caused by: org.xwiki.query.QueryException: Exception while executing query. Query statement = [select elements(prop.list) from XWikiDocument as doc, BaseObject as tagobject, DBStringListProperty as prop where tagobject.name=doc.fullName and tagobject.className='XWiki.TagClass' and tagobject.id=prop.id.id and prop.id.name='tags']
	at com.xpn.xwiki.store.hibernate.query.HqlQueryExecutor.execute(HqlQueryExecutor.java:184)
	at org.xwiki.query.internal.DefaultQueryExecutorManager.execute(DefaultQueryExecutorManager.java:72)
	at org.xwiki.query.internal.DefaultQuery.execute(DefaultQuery.java:287)
	at com.xpn.xwiki.plugin.tag.TagQueryUtils.getTagCountForQuery(TagQueryUtils.java:130)
	... 183 more
Caused by: com.xpn.xwiki.XWikiException: Error number 3301 in 3: Exception while switching to database xwiki
	at com.xpn.xwiki.store.XWikiHibernateBaseStore.setDatabase(XWikiHibernateBaseStore.java:762)
	at com.xpn.xwiki.store.XWikiHibernateBaseStore.beginTransaction(XWikiHibernateBaseStore.java:935)
	at com.xpn.xwiki.store.XWikiHibernateBaseStore.beginTransaction(XWikiHibernateBaseStore.java:834)
	at com.xpn.xwiki.store.XWikiHibernateBaseStore.execute(XWikiHibernateBaseStore.java:1326)
	at com.xpn.xwiki.store.XWikiHibernateBaseStore.executeRead(XWikiHibernateBaseStore.java:1394)
	at com.xpn.xwiki.store.hibernate.query.HqlQueryExecutor.execute(HqlQueryExecutor.java:165)
	... 186 more
Caused by: org.hibernate.exception.GenericJDBCException: error executing work
	at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:140)
	at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:128)
	at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
	at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:52)
	at org.hibernate.impl.SessionImpl.doWork(SessionImpl.java:2001)
	at com.xpn.xwiki.store.XWikiHibernateBaseStore.executeSQL(XWikiHibernateBaseStore.java:776)
	at com.xpn.xwiki.store.XWikiHibernateBaseStore.setDatabase(XWikiHibernateBaseStore.java:745)
	... 191 more
Caused by: java.sql.SQLException: file input/output error: /usr/local/XWiki Enterprise 8.4.4/data/database/xwiki_db.log in statement [SET SCHEMA "PUBLIC"]
	at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source)
	at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source)
	at org.hsqldb.jdbc.JDBCStatement.fetchResult(Unknown Source)
	at org.hsqldb.jdbc.JDBCStatement.execute(Unknown Source)
	at org.apache.commons.dbcp2.DelegatingStatement.execute(DelegatingStatement.java:291)
	at org.apache.commons.dbcp2.DelegatingStatement.execute(DelegatingStatement.java:291)
	at com.xpn.xwiki.store.XWikiHibernateBaseStore$1.execute(XWikiHibernateBaseStore.java:784)
	at org.hibernate.impl.SessionImpl.doWork(SessionImpl.java:1997)
	... 193 more
Caused by: org.hsqldb.HsqlException: file input/output error: /usr/local/XWiki Enterprise 8.4.4/data/database/xwiki_db.log
	at org.hsqldb.error.Error.error(Unknown Source)
	at org.hsqldb.error.Error.error(Unknown Source)
	at org.hsqldb.persist.Log.writeOtherStatement(Unknown Source)
	at org.hsqldb.persist.Logger.writeOtherStatement(Unknown Source)
	at org.hsqldb.StatementSession.execute(Unknown Source)
	at org.hsqldb.Session.executeCompiledStatement(Unknown Source)
	at org.hsqldb.Session.executeDirectStatement(Unknown Source)
	at org.hsqldb.Session.execute(Unknown Source)
	... 199 more