Changes for page How to set threshold alarm and get Email notification

org.xwiki.rendering.RenderingException: Failed to execute renderer
 at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.syncRender(DefaultAsyncRendererExecutor.java:287)
 at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.render(DefaultAsyncRendererExecutor.java:267)
 at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor.render(DefaultBlockAsyncRendererExecutor.java:154)
 at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:904)
 at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:866)
 at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:853)
 at com.xpn.xwiki.internal.template.InternalTemplateManager.renderNoException(InternalTemplateManager.java:808)
 at com.xpn.xwiki.internal.template.InternalTemplateManager.renderNoException(InternalTemplateManager.java:800)
 at com.xpn.xwiki.internal.template.DefaultTemplateManager.renderNoException(DefaultTemplateManager.java:79)
 at com.xpn.xwiki.internal.template.DefaultTemplateManager.renderNoException(DefaultTemplateManager.java:73)
 at org.xwiki.template.script.TemplateScriptService.render(TemplateScriptService.java:54)
 at jdk.internal.reflect.GeneratedMethodAccessor176.invoke(Unknown Source)
 at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.base/java.lang.reflect.Method.invoke(Method.java:569)
 at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:571)
 at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:554)
 at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:221)
 at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:368)
 at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:492)
 at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:147)
 at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:218)
 at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:331)
 at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:261)
 at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:304)
 at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:439)
 at org.apache.velocity.Template.merge(Template.java:358)
 at org.apache.velocity.Template.merge(Template.java:262)
 at org.xwiki.velocity.internal.InternalVelocityEngine.evaluate(InternalVelocityEngine.java:225)
 at com.xpn.xwiki.internal.template.VelocityTemplateEvaluator.evaluateContent(VelocityTemplateEvaluator.java:105)
 at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.evaluateContent(TemplateAsyncRenderer.java:219)
 at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.renderVelocity(TemplateAsyncRenderer.java:174)
 at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:135)
 at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:54)
 at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.lambda$syncRender$0(DefaultAsyncRendererExecutor.java:284)
 at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98)
 at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.syncRender(DefaultAsyncRendererExecutor.java:284)
 at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.render(DefaultAsyncRendererExecutor.java:267)
 at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor.render(DefaultBlockAsyncRendererExecutor.java:154)
 at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:904)
 at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:866)
 at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:853)
 at com.xpn.xwiki.internal.template.InternalTemplateManager.renderNoException(InternalTemplateManager.java:808)
 at com.xpn.xwiki.internal.template.InternalTemplateManager.renderNoException(InternalTemplateManager.java:800)
 at com.xpn.xwiki.internal.template.DefaultTemplateManager.renderNoException(DefaultTemplateManager.java:79)
 at com.xpn.xwiki.internal.template.DefaultTemplateManager.renderNoException(DefaultTemplateManager.java:73)
 at org.xwiki.template.script.TemplateScriptService.render(TemplateScriptService.java:54)
 at jdk.internal.reflect.GeneratedMethodAccessor176.invoke(Unknown Source)
 at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.base/java.lang.reflect.Method.invoke(Method.java:569)
 at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:571)
 at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:554)
 at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:221)
 at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:368)
 at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:492)
 at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:147)
 at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:218)
 at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:331)
 at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:261)
 at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:304)
 at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:147)
 at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:439)
 at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:190)
 at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:147)
 at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:439)
 at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:190)
 at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:439)
 at org.apache.velocity.Template.merge(Template.java:358)
 at org.apache.velocity.Template.merge(Template.java:262)
 at org.xwiki.velocity.internal.InternalVelocityEngine.evaluate(InternalVelocityEngine.java:225)
 at com.xpn.xwiki.internal.template.VelocityTemplateEvaluator.evaluateContent(VelocityTemplateEvaluator.java:105)
 at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.evaluateContent(TemplateAsyncRenderer.java:219)
 at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.renderVelocity(TemplateAsyncRenderer.java:174)
 at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:135)
 at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:54)
 at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.lambda$syncRender$0(DefaultAsyncRendererExecutor.java:284)
 at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98)
 at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.syncRender(DefaultAsyncRendererExecutor.java:284)
 at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.render(DefaultAsyncRendererExecutor.java:267)
 at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor.render(DefaultBlockAsyncRendererExecutor.java:154)
 at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:904)
 at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:866)
 at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:846)
 at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:832)
 at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:91)
 at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:85)
 at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2564)
 at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:180)
 at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:651)
 at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:339)
 at com.xpn.xwiki.web.LegacyActionServlet.service(LegacyActionServlet.java:108)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:590)
 at org.eclipse.jetty.ee8.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1151)
 at org.eclipse.jetty.ee8.servlet.ServletHolder.handle(ServletHolder.java:640)
 at org.eclipse.jetty.ee8.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1374)
 at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:122)
 at org.eclipse.jetty.ee8.servlet.FilterHolder.doFilter(FilterHolder.java:171)
 at org.eclipse.jetty.ee8.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1348)
 at org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:61)
 at org.eclipse.jetty.ee8.servlet.FilterHolder.doFilter(FilterHolder.java:171)
 at org.eclipse.jetty.ee8.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1348)
 at org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
 at org.eclipse.jetty.ee8.servlet.FilterHolder.doFilter(FilterHolder.java:171)
 at org.eclipse.jetty.ee8.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1348)
 at org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)
 at org.eclipse.jetty.ee8.servlet.FilterHolder.doFilter(FilterHolder.java:171)
 at org.eclipse.jetty.ee8.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1348)
 at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
 at org.eclipse.jetty.ee8.servlet.FilterHolder.doFilter(FilterHolder.java:171)
 at org.eclipse.jetty.ee8.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1348)
 at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:117)
 at org.eclipse.jetty.ee8.servlet.FilterHolder.doFilter(FilterHolder.java:177)
 at org.eclipse.jetty.ee8.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1348)
 at org.eclipse.jetty.ee8.websocket.servlet.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:175)
 at org.eclipse.jetty.ee8.servlet.FilterHolder.doFilter(FilterHolder.java:171)
 at org.eclipse.jetty.ee8.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1348)
 at org.eclipse.jetty.ee8.servlet.ServletHandler.doHandle(ServletHandler.java:454)
 at org.eclipse.jetty.ee8.nested.ScopedHandler.handle(ScopedHandler.java:119)
 at org.eclipse.jetty.ee8.security.SecurityHandler.handle(SecurityHandler.java:497)
 at org.eclipse.jetty.ee8.nested.HandlerWrapper.handle(HandlerWrapper.java:108)
 at org.eclipse.jetty.ee8.nested.ScopedHandler.nextHandle(ScopedHandler.java:183)
 at org.eclipse.jetty.ee8.nested.SessionHandler.doHandle(SessionHandler.java:516)
 at org.eclipse.jetty.ee8.nested.ScopedHandler.nextHandle(ScopedHandler.java:181)
 at org.eclipse.jetty.ee8.nested.ContextHandler.doHandle(ContextHandler.java:878)
 at org.eclipse.jetty.ee8.nested.ScopedHandler.nextScope(ScopedHandler.java:152)
 at org.eclipse.jetty.ee8.servlet.ServletHandler.doScope(ServletHandler.java:423)
 at org.eclipse.jetty.ee8.nested.ScopedHandler.nextScope(ScopedHandler.java:150)
 at org.eclipse.jetty.ee8.nested.SessionHandler.doScope(SessionHandler.java:500)
 at org.eclipse.jetty.ee8.nested.ScopedHandler.nextScope(ScopedHandler.java:150)
 at org.eclipse.jetty.ee8.nested.ContextHandler.doScope(ContextHandler.java:823)
 at org.eclipse.jetty.ee8.nested.ScopedHandler.handle(ScopedHandler.java:117)
 at org.eclipse.jetty.ee8.nested.ContextHandler.handle(ContextHandler.java:1421)
 at org.eclipse.jetty.ee8.nested.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1294)
 at org.eclipse.jetty.ee8.nested.HttpChannel.dispatch(HttpChannel.java:624)
 at org.eclipse.jetty.ee8.nested.HttpChannel.handle(HttpChannel.java:456)
 at org.eclipse.jetty.ee8.nested.ContextHandler$CoreContextHandler$CoreToNestedHandler.handle(ContextHandler.java:2365)
 at org.eclipse.jetty.server.handler.ContextHandler.handle(ContextHandler.java:1060)
 at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:181)
 at org.eclipse.jetty.server.Server.handle(Server.java:181)
 at org.eclipse.jetty.server.internal.HttpChannelState$HandlerInvoker.run(HttpChannelState.java:648)
 at org.eclipse.jetty.server.internal.HttpConnection.onFillable(HttpConnection.java:403)
 at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:322)
 at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:99)
 at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)
 at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:478)
 at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:441)
 at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:293)
 at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.run(AdaptiveExecutionStrategy.java:201)
 at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:311)
 at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:979)
 at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1209)
 at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1164)
 at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: org.xwiki.rendering.RenderingException: Failed to evaluate template with id [environment:/templates/changesinline.vm]
 at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.evaluateContent(TemplateAsyncRenderer.java:221)
 at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.renderVelocity(TemplateAsyncRenderer.java:174)
 at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:135)
 at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:54)
 at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.lambda$syncRender$0(DefaultAsyncRendererExecutor.java:284)
 at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98)
 at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.syncRender(DefaultAsyncRendererExecutor.java:284)
 ... 151 more
Caused by: org.xwiki.velocity.XWikiVelocityException: Failed to evaluate content with namespace [environment:/skins/flamingo/view.vm]
 at org.xwiki.velocity.internal.InternalVelocityEngine.evaluate(InternalVelocityEngine.java:227)
 at com.xpn.xwiki.internal.template.VelocityTemplateEvaluator.evaluateContent(VelocityTemplateEvaluator.java:105)
 at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.evaluateContent(TemplateAsyncRenderer.java:219)
 ... 157 more
Caused by: org.apache.velocity.exception.MethodInvocationException: Invocation of method 'getRevisions' in  class com.xpn.xwiki.api.Document threw exception com.xpn.xwiki.XWikiException: Error number 3203 in 3: Exception while reading document Main.How to set threshold alarm and get Email notification.WebHome revisions at environment:/templates/changesinline.vm[line 50, column 31]
 at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:308)
 at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:235)
 at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:368)
 at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:704)
 at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:75)
 at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:242)
 at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:147)
 at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:171)
 at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:439)
 at org.apache.velocity.Template.merge(Template.java:358)
 at org.apache.velocity.Template.merge(Template.java:262)
 at org.xwiki.velocity.internal.InternalVelocityEngine.evaluate(InternalVelocityEngine.java:225)
 ... 159 more
Caused by: com.xpn.xwiki.XWikiException: Error number 3203 in 3: Exception while reading document Main.How to set threshold alarm and get Email notification.WebHome revisions
 at com.xpn.xwiki.store.XWikiHibernateVersioningStore.getXWikiDocVersions(XWikiHibernateVersioningStore.java:133)
 at com.xpn.xwiki.doc.XWikiDocument.getRevisions(XWikiDocument.java:2736)
 at com.xpn.xwiki.api.Document.getRevisions(Document.java:1456)
 at jdk.internal.reflect.GeneratedMethodAccessor740.invoke(Unknown Source)
 at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.base/java.lang.reflect.Method.invoke(Method.java:569)
 at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:571)
 at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:554)
 at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:221)
 ... 169 more
Caused by: com.xpn.xwiki.XWikiException: Error number 3212 in 3: Exception while loading archive 9,080,245,793,132,419,921
 at com.xpn.xwiki.store.XWikiHibernateVersioningStore.loadXWikiDocArchive(XWikiHibernateVersioningStore.java:212)
 at com.xpn.xwiki.store.XWikiHibernateVersioningStore.getXWikiDocumentArchiveFromDatabase(XWikiHibernateVersioningStore.java:183)
 at com.xpn.xwiki.store.XWikiHibernateVersioningStore.getXWikiDocumentArchive(XWikiHibernateVersioningStore.java:151)
 at com.xpn.xwiki.store.XWikiHibernateVersioningStore.getXWikiDocVersions(XWikiHibernateVersioningStore.java:121)
 ... 177 more
Caused by: com.xpn.xwiki.XWikiException: Error number 0 in 3: Exception while hibernate execute
 at com.xpn.xwiki.store.XWikiHibernateBaseStore.execute(XWikiHibernateBaseStore.java:835)
 at com.xpn.xwiki.store.XWikiHibernateBaseStore.executeRead(XWikiHibernateBaseStore.java:902)
 at com.xpn.xwiki.store.XWikiHibernateVersioningStore.loadRCSNodeInfo(XWikiHibernateVersioningStore.java:356)
 at com.xpn.xwiki.store.XWikiHibernateVersioningStore.loadXWikiDocArchive(XWikiHibernateVersioningStore.java:208)
 ... 180 more
Caused by: javax.persistence.PersistenceException: org.hibernate.exception.JDBCConnectionException: Unable to acquire JDBC Connection
 at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:154)
 at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1626)
 at org.hibernate.query.Query.getResultList(Query.java:165)
 at org.hibernate.query.criteria.internal.compile.CriteriaQueryTypeQueryAdapter.getResultList(CriteriaQueryTypeQueryAdapter.java:76)
 at com.xpn.xwiki.store.XWikiHibernateVersioningStore.lambda$loadRCSNodeInfo$4(XWikiHibernateVersioningStore.java:359)
 at com.xpn.xwiki.store.XWikiHibernateBaseStore.execute(XWikiHibernateBaseStore.java:826)
 ... 183 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:37)
 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:111)
 at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getPhysicalConnection(LogicalConnectionManagedImpl.java:138)
 at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.connection(StatementPreparerImpl.java:50)
 at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:149)
 at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:176)
 at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:151)
 at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:2122)
 at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2059)
 at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2037)
 at org.hibernate.loader.Loader.doQuery(Loader.java:956)
 at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:357)
 at org.hibernate.loader.Loader.doList(Loader.java:2868)
 at org.hibernate.loader.Loader.doList(Loader.java:2850)
 at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2682)
 at org.hibernate.loader.Loader.list(Loader.java:2677)
 at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:540)
 at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:400)
 at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:218)
 at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1459)
 at org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1649)
 at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1617)
 ... 187 more
Caused by: com.mysql.cj.jdbc.exceptions.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 com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:165)
 at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:55)
 at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:845)
 at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:420)
 at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:238)
 at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:180)
 at org.apache.commons.dbcp2.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:52)
 at org.apache.commons.dbcp2.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:414)
 at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:566)
 at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:306)
 at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:233)
 at org.apache.commons.dbcp2.PoolingDataSource.getConnection(PoolingDataSource.java:139)
 at org.apache.commons.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:714)
 at com.xpn.xwiki.store.DBCPConnectionProvider.getConnection(DBCPConnectionProvider.java:258)
 at org.hibernate.internal.NonContextualJdbcConnectionAccess.obtainConnection(NonContextualJdbcConnectionAccess.java:38)
 at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:108)
 ... 207 more
Caused by: com.mysql.cj.exceptions.CJCommunicationsException: 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 java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
 at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
 at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
 at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
 at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
 at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:52)
 at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:95)
 at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:140)
 at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:156)
 at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:79)
 at com.mysql.cj.NativeSession.connect(NativeSession.java:140)
 at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:969)
 at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:833)
 ... 220 more
Caused by: java.net.ConnectException: Connection refused
 at java.base/sun.nio.ch.Net.connect0(Native Method)
 at java.base/sun.nio.ch.Net.connect(Net.java:591)
 at java.base/sun.nio.ch.Net.connect(Net.java:580)
 at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:593)
 at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327)
 at java.base/java.net.Socket.connect(Socket.java:633)
 at com.mysql.cj.protocol.StandardSocketFactory.connect(StandardSocketFactory.java:144)
 at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:53)
 ... 223 more