```
HTTP Status 500 – Internal Server Error
Type Exception Report

Message Failed to execute the action with name [view]

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

javax.servlet.ServletException: Failed to execute the action with name [view]
	com.xpn.xwiki.web.LegacyActionServlet.service(LegacyActionServlet.java:110)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:122)
	org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:61)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
	org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)
	org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
Root Cause

com.xpn.xwiki.XWikiException: Error number 11007 in 0: Failed to extract Entity Resource Reference from URL [http://localhost:8080/bin/view/Main/]
	com.xpn.xwiki.XWiki.initializeResourceFromURL(XWiki.java:1124)
	com.xpn.xwiki.XWiki.getXWiki(XWiki.java:971)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:429)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:339)
	com.xpn.xwiki.web.LegacyActionServlet.service(LegacyActionServlet.java:108)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:122)
	org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:61)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
	org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)
	org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
Root Cause

java.lang.RuntimeException: Failed to locate wiki descriptor for alias [localhost]
	org.xwiki.url.internal.standard.AbstractWikiReferenceExtractor.getWikiDescriptorByAlias(AbstractWikiReferenceExtractor.java:82)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.resolveDomainBasedWikiReference(DomainWikiReferenceExtractor.java:61)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.extract(DomainWikiReferenceExtractor.java:47)
	org.xwiki.url.internal.standard.entity.BinEntityResourceReferenceResolver.extractWikiReference(BinEntityResourceReferenceResolver.java:51)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:87)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:50)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:61)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:47)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:65)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:43)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:93)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:48)
	com.xpn.xwiki.XWiki.initializeResourceFromURL(XWiki.java:1119)
	com.xpn.xwiki.XWiki.getXWiki(XWiki.java:971)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:429)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:339)
	com.xpn.xwiki.web.LegacyActionServlet.service(LegacyActionServlet.java:108)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:122)
	org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:61)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
	org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)
	org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
Root Cause

org.xwiki.wiki.manager.WikiManagerException: Failed to locate XWiki.XWikiServerClass document for wiki alias [localhost]
	org.xwiki.wiki.internal.descriptor.document.DefaultWikiDescriptorDocumentHelper.findXWikiServerClassDocumentReference(DefaultWikiDescriptorDocumentHelper.java:128)
	org.xwiki.wiki.internal.descriptor.document.DefaultWikiDescriptorDocumentHelper.findXWikiServerClassDocument(DefaultWikiDescriptorDocumentHelper.java:140)
	org.xwiki.wiki.internal.descriptor.DefaultWikiDescriptorManager.getByAlias(DefaultWikiDescriptorManager.java:161)
	org.xwiki.url.internal.standard.AbstractWikiReferenceExtractor.getWikiDescriptorByAlias(AbstractWikiReferenceExtractor.java:80)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.resolveDomainBasedWikiReference(DomainWikiReferenceExtractor.java:61)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.extract(DomainWikiReferenceExtractor.java:47)
	org.xwiki.url.internal.standard.entity.BinEntityResourceReferenceResolver.extractWikiReference(BinEntityResourceReferenceResolver.java:51)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:87)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:50)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:61)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:47)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:65)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:43)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:93)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:48)
	com.xpn.xwiki.XWiki.initializeResourceFromURL(XWiki.java:1119)
	com.xpn.xwiki.XWiki.getXWiki(XWiki.java:971)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:429)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:339)
	com.xpn.xwiki.web.LegacyActionServlet.service(LegacyActionServlet.java:108)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:122)
	org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:61)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
	org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)
	org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
Root Cause

org.xwiki.query.QueryException: Exception while translating [where doc.object(XWiki.XWikiServerClass).server = :wikiAlias and doc.name like 'XWikiServer%'] XWQL query to the [hql] language. Query statement = [where doc.object(XWiki.XWikiServerClass).server = :wikiAlias and doc.name like 'XWikiServer%']
	org.xwiki.query.xwql.internal.XWQLQueryExecutor.execute(XWQLQueryExecutor.java:122)
	org.xwiki.query.internal.DefaultQueryExecutorManager.execute(DefaultQueryExecutorManager.java:72)
	org.xwiki.query.internal.DefaultQuery.execute(DefaultQuery.java:306)
	org.xwiki.wiki.internal.descriptor.document.DefaultWikiDescriptorDocumentHelper.findXWikiServerClassDocumentReference(DefaultWikiDescriptorDocumentHelper.java:121)
	org.xwiki.wiki.internal.descriptor.document.DefaultWikiDescriptorDocumentHelper.findXWikiServerClassDocument(DefaultWikiDescriptorDocumentHelper.java:140)
	org.xwiki.wiki.internal.descriptor.DefaultWikiDescriptorManager.getByAlias(DefaultWikiDescriptorManager.java:161)
	org.xwiki.url.internal.standard.AbstractWikiReferenceExtractor.getWikiDescriptorByAlias(AbstractWikiReferenceExtractor.java:80)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.resolveDomainBasedWikiReference(DomainWikiReferenceExtractor.java:61)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.extract(DomainWikiReferenceExtractor.java:47)
	org.xwiki.url.internal.standard.entity.BinEntityResourceReferenceResolver.extractWikiReference(BinEntityResourceReferenceResolver.java:51)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:87)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:50)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:61)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:47)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:65)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:43)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:93)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:48)
	com.xpn.xwiki.XWiki.initializeResourceFromURL(XWiki.java:1119)
	com.xpn.xwiki.XWiki.getXWiki(XWiki.java:971)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:429)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:339)
	com.xpn.xwiki.web.LegacyActionServlet.service(LegacyActionServlet.java:108)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:122)
	org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:61)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
	org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)
	org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
Root Cause

com.xpn.xwiki.XWikiException: Error number 3202 in 3: Exception while reading document [xwiki:XWiki.XWikiServerClass()]
	com.xpn.xwiki.store.XWikiHibernateStore.loadXWikiDoc(XWikiHibernateStore.java:1184)
	com.xpn.xwiki.store.XWikiCacheStore.loadXWikiDoc(XWikiCacheStore.java:399)
	com.xpn.xwiki.XWiki.getDocument(XWiki.java:2195)
	com.xpn.xwiki.XWiki.getDocument(XWiki.java:2257)
	com.xpn.xwiki.XWiki.getXClass(XWiki.java:7065)
	com.xpn.xwiki.XWiki.getClass(XWiki.java:7078)
	com.xpn.xwiki.doc.DefaultDocumentAccessBridge.isPropertyCustomMapped(DefaultDocumentAccessBridge.java:559)
	org.xwiki.query.xwql.internal.QueryContext$PropertyInfo.isCustomMapped(QueryContext.java:153)
	org.xwiki.query.xwql.internal.QueryContext$ObjectInfo.isCustomMapped(QueryContext.java:122)
	org.xwiki.query.xwql.internal.hql.ObjectPrinter.print(ObjectPrinter.java:37)
	org.xwiki.query.xwql.internal.hql.Printer.print(Printer.java:70)
	org.xwiki.query.xwql.internal.hql.XWQLtoHQLTranslator.translate(XWQLtoHQLTranslator.java:61)
	org.xwiki.query.xwql.internal.XWQLQueryExecutor.execute(XWQLQueryExecutor.java:90)
	org.xwiki.query.internal.DefaultQueryExecutorManager.execute(DefaultQueryExecutorManager.java:72)
	org.xwiki.query.internal.DefaultQuery.execute(DefaultQuery.java:306)
	org.xwiki.wiki.internal.descriptor.document.DefaultWikiDescriptorDocumentHelper.findXWikiServerClassDocumentReference(DefaultWikiDescriptorDocumentHelper.java:121)
	org.xwiki.wiki.internal.descriptor.document.DefaultWikiDescriptorDocumentHelper.findXWikiServerClassDocument(DefaultWikiDescriptorDocumentHelper.java:140)
	org.xwiki.wiki.internal.descriptor.DefaultWikiDescriptorManager.getByAlias(DefaultWikiDescriptorManager.java:161)
	org.xwiki.url.internal.standard.AbstractWikiReferenceExtractor.getWikiDescriptorByAlias(AbstractWikiReferenceExtractor.java:80)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.resolveDomainBasedWikiReference(DomainWikiReferenceExtractor.java:61)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.extract(DomainWikiReferenceExtractor.java:47)
	org.xwiki.url.internal.standard.entity.BinEntityResourceReferenceResolver.extractWikiReference(BinEntityResourceReferenceResolver.java:51)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:87)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:50)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:61)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:47)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:65)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:43)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:93)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:48)
	com.xpn.xwiki.XWiki.initializeResourceFromURL(XWiki.java:1119)
	com.xpn.xwiki.XWiki.getXWiki(XWiki.java:971)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:429)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:339)
	com.xpn.xwiki.web.LegacyActionServlet.service(LegacyActionServlet.java:108)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:122)
	org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:61)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
	org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)
	org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
Root Cause

org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
	org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:284)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:246)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:223)
	org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:175)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:295)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:252)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:223)
	org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:173)
	org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:127)
	org.hibernate.boot.model.process.spi.MetadataBuildingProcess.build(MetadataBuildingProcess.java:86)
	org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:479)
	org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:85)
	com.xpn.xwiki.internal.store.hibernate.HibernateStore.createSessionFactory(HibernateStore.java:275)
	com.xpn.xwiki.internal.store.hibernate.HibernateStore.build(HibernateStore.java:363)
	com.xpn.xwiki.internal.store.hibernate.HibernateStore.initHibernate(HibernateStore.java:290)
	com.xpn.xwiki.store.XWikiHibernateBaseStore.checkHibernateSynchronized(XWikiHibernateBaseStore.java:481)
	com.xpn.xwiki.store.XWikiHibernateBaseStore.checkHibernate(XWikiHibernateBaseStore.java:474)
	com.xpn.xwiki.store.XWikiHibernateStore.loadXWikiDoc(XWikiHibernateStore.java:1037)
	com.xpn.xwiki.store.XWikiCacheStore.loadXWikiDoc(XWikiCacheStore.java:399)
	com.xpn.xwiki.XWiki.getDocument(XWiki.java:2195)
	com.xpn.xwiki.XWiki.getDocument(XWiki.java:2257)
	com.xpn.xwiki.XWiki.getXClass(XWiki.java:7065)
	com.xpn.xwiki.XWiki.getClass(XWiki.java:7078)
	com.xpn.xwiki.doc.DefaultDocumentAccessBridge.isPropertyCustomMapped(DefaultDocumentAccessBridge.java:559)
	org.xwiki.query.xwql.internal.QueryContext$PropertyInfo.isCustomMapped(QueryContext.java:153)
	org.xwiki.query.xwql.internal.QueryContext$ObjectInfo.isCustomMapped(QueryContext.java:122)
	org.xwiki.query.xwql.internal.hql.ObjectPrinter.print(ObjectPrinter.java:37)
	org.xwiki.query.xwql.internal.hql.Printer.print(Printer.java:70)
	org.xwiki.query.xwql.internal.hql.XWQLtoHQLTranslator.translate(XWQLtoHQLTranslator.java:61)
	org.xwiki.query.xwql.internal.XWQLQueryExecutor.execute(XWQLQueryExecutor.java:90)
	org.xwiki.query.internal.DefaultQueryExecutorManager.execute(DefaultQueryExecutorManager.java:72)
	org.xwiki.query.internal.DefaultQuery.execute(DefaultQuery.java:306)
	org.xwiki.wiki.internal.descriptor.document.DefaultWikiDescriptorDocumentHelper.findXWikiServerClassDocumentReference(DefaultWikiDescriptorDocumentHelper.java:121)
	org.xwiki.wiki.internal.descriptor.document.DefaultWikiDescriptorDocumentHelper.findXWikiServerClassDocument(DefaultWikiDescriptorDocumentHelper.java:140)
	org.xwiki.wiki.internal.descriptor.DefaultWikiDescriptorManager.getByAlias(DefaultWikiDescriptorManager.java:161)
	org.xwiki.url.internal.standard.AbstractWikiReferenceExtractor.getWikiDescriptorByAlias(AbstractWikiReferenceExtractor.java:80)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.resolveDomainBasedWikiReference(DomainWikiReferenceExtractor.java:61)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.extract(DomainWikiReferenceExtractor.java:47)
	org.xwiki.url.internal.standard.entity.BinEntityResourceReferenceResolver.extractWikiReference(BinEntityResourceReferenceResolver.java:51)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:87)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:50)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:61)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:47)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:65)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:43)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:93)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:48)
	com.xpn.xwiki.XWiki.initializeResourceFromURL(XWiki.java:1119)
	com.xpn.xwiki.XWiki.getXWiki(XWiki.java:971)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:429)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:339)
	com.xpn.xwiki.web.LegacyActionServlet.service(LegacyActionServlet.java:108)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:122)
	org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:61)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
	org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)
	org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
Root Cause

org.hibernate.HibernateException: Could not create a DBCP pool. There is an error in the Hibernate configuration file, please review it.
	com.xpn.xwiki.store.DBCPConnectionProvider.configure(DBCPConnectionProvider.java:242)
	org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:107)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:255)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:223)
	org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.buildJdbcConnectionAccess(JdbcEnvironmentInitiator.java:146)
	org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:66)
	org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35)
	org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:101)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:272)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:246)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:223)
	org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:175)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:295)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:252)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:223)
	org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:173)
	org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:127)
	org.hibernate.boot.model.process.spi.MetadataBuildingProcess.build(MetadataBuildingProcess.java:86)
	org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:479)
	org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:85)
	com.xpn.xwiki.internal.store.hibernate.HibernateStore.createSessionFactory(HibernateStore.java:275)
	com.xpn.xwiki.internal.store.hibernate.HibernateStore.build(HibernateStore.java:363)
	com.xpn.xwiki.internal.store.hibernate.HibernateStore.initHibernate(HibernateStore.java:290)
	com.xpn.xwiki.store.XWikiHibernateBaseStore.checkHibernateSynchronized(XWikiHibernateBaseStore.java:481)
	com.xpn.xwiki.store.XWikiHibernateBaseStore.checkHibernate(XWikiHibernateBaseStore.java:474)
	com.xpn.xwiki.store.XWikiHibernateStore.loadXWikiDoc(XWikiHibernateStore.java:1037)
	com.xpn.xwiki.store.XWikiCacheStore.loadXWikiDoc(XWikiCacheStore.java:399)
	com.xpn.xwiki.XWiki.getDocument(XWiki.java:2195)
	com.xpn.xwiki.XWiki.getDocument(XWiki.java:2257)
	com.xpn.xwiki.XWiki.getXClass(XWiki.java:7065)
	com.xpn.xwiki.XWiki.getClass(XWiki.java:7078)
	com.xpn.xwiki.doc.DefaultDocumentAccessBridge.isPropertyCustomMapped(DefaultDocumentAccessBridge.java:559)
	org.xwiki.query.xwql.internal.QueryContext$PropertyInfo.isCustomMapped(QueryContext.java:153)
	org.xwiki.query.xwql.internal.QueryContext$ObjectInfo.isCustomMapped(QueryContext.java:122)
	org.xwiki.query.xwql.internal.hql.ObjectPrinter.print(ObjectPrinter.java:37)
	org.xwiki.query.xwql.internal.hql.Printer.print(Printer.java:70)
	org.xwiki.query.xwql.internal.hql.XWQLtoHQLTranslator.translate(XWQLtoHQLTranslator.java:61)
	org.xwiki.query.xwql.internal.XWQLQueryExecutor.execute(XWQLQueryExecutor.java:90)
	org.xwiki.query.internal.DefaultQueryExecutorManager.execute(DefaultQueryExecutorManager.java:72)
	org.xwiki.query.internal.DefaultQuery.execute(DefaultQuery.java:306)
	org.xwiki.wiki.internal.descriptor.document.DefaultWikiDescriptorDocumentHelper.findXWikiServerClassDocumentReference(DefaultWikiDescriptorDocumentHelper.java:121)
	org.xwiki.wiki.internal.descriptor.document.DefaultWikiDescriptorDocumentHelper.findXWikiServerClassDocument(DefaultWikiDescriptorDocumentHelper.java:140)
	org.xwiki.wiki.internal.descriptor.DefaultWikiDescriptorManager.getByAlias(DefaultWikiDescriptorManager.java:161)
	org.xwiki.url.internal.standard.AbstractWikiReferenceExtractor.getWikiDescriptorByAlias(AbstractWikiReferenceExtractor.java:80)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.resolveDomainBasedWikiReference(DomainWikiReferenceExtractor.java:61)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.extract(DomainWikiReferenceExtractor.java:47)
	org.xwiki.url.internal.standard.entity.BinEntityResourceReferenceResolver.extractWikiReference(BinEntityResourceReferenceResolver.java:51)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:87)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:50)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:61)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:47)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:65)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:43)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:93)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:48)
	com.xpn.xwiki.XWiki.initializeResourceFromURL(XWiki.java:1119)
	com.xpn.xwiki.XWiki.getXWiki(XWiki.java:971)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:429)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:339)
	com.xpn.xwiki.web.LegacyActionServlet.service(LegacyActionServlet.java:108)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:122)
	org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:61)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
	org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)
	org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
Root Cause

java.sql.SQLException: Cannot create PoolableConnectionFactory (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.)
	org.apache.commons.dbcp2.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:633)
	org.apache.commons.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:535)
	org.apache.commons.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:711)
	com.xpn.xwiki.store.DBCPConnectionProvider.configure(DBCPConnectionProvider.java:225)
	org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:107)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:255)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:223)
	org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.buildJdbcConnectionAccess(JdbcEnvironmentInitiator.java:146)
	org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:66)
	org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35)
	org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:101)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:272)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:246)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:223)
	org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:175)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:295)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:252)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:223)
	org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:173)
	org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:127)
	org.hibernate.boot.model.process.spi.MetadataBuildingProcess.build(MetadataBuildingProcess.java:86)
	org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:479)
	org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:85)
	com.xpn.xwiki.internal.store.hibernate.HibernateStore.createSessionFactory(HibernateStore.java:275)
	com.xpn.xwiki.internal.store.hibernate.HibernateStore.build(HibernateStore.java:363)
	com.xpn.xwiki.internal.store.hibernate.HibernateStore.initHibernate(HibernateStore.java:290)
	com.xpn.xwiki.store.XWikiHibernateBaseStore.checkHibernateSynchronized(XWikiHibernateBaseStore.java:481)
	com.xpn.xwiki.store.XWikiHibernateBaseStore.checkHibernate(XWikiHibernateBaseStore.java:474)
	com.xpn.xwiki.store.XWikiHibernateStore.loadXWikiDoc(XWikiHibernateStore.java:1037)
	com.xpn.xwiki.store.XWikiCacheStore.loadXWikiDoc(XWikiCacheStore.java:399)
	com.xpn.xwiki.XWiki.getDocument(XWiki.java:2195)
	com.xpn.xwiki.XWiki.getDocument(XWiki.java:2257)
	com.xpn.xwiki.XWiki.getXClass(XWiki.java:7065)
	com.xpn.xwiki.XWiki.getClass(XWiki.java:7078)
	com.xpn.xwiki.doc.DefaultDocumentAccessBridge.isPropertyCustomMapped(DefaultDocumentAccessBridge.java:559)
	org.xwiki.query.xwql.internal.QueryContext$PropertyInfo.isCustomMapped(QueryContext.java:153)
	org.xwiki.query.xwql.internal.QueryContext$ObjectInfo.isCustomMapped(QueryContext.java:122)
	org.xwiki.query.xwql.internal.hql.ObjectPrinter.print(ObjectPrinter.java:37)
	org.xwiki.query.xwql.internal.hql.Printer.print(Printer.java:70)
	org.xwiki.query.xwql.internal.hql.XWQLtoHQLTranslator.translate(XWQLtoHQLTranslator.java:61)
	org.xwiki.query.xwql.internal.XWQLQueryExecutor.execute(XWQLQueryExecutor.java:90)
	org.xwiki.query.internal.DefaultQueryExecutorManager.execute(DefaultQueryExecutorManager.java:72)
	org.xwiki.query.internal.DefaultQuery.execute(DefaultQuery.java:306)
	org.xwiki.wiki.internal.descriptor.document.DefaultWikiDescriptorDocumentHelper.findXWikiServerClassDocumentReference(DefaultWikiDescriptorDocumentHelper.java:121)
	org.xwiki.wiki.internal.descriptor.document.DefaultWikiDescriptorDocumentHelper.findXWikiServerClassDocument(DefaultWikiDescriptorDocumentHelper.java:140)
	org.xwiki.wiki.internal.descriptor.DefaultWikiDescriptorManager.getByAlias(DefaultWikiDescriptorManager.java:161)
	org.xwiki.url.internal.standard.AbstractWikiReferenceExtractor.getWikiDescriptorByAlias(AbstractWikiReferenceExtractor.java:80)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.resolveDomainBasedWikiReference(DomainWikiReferenceExtractor.java:61)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.extract(DomainWikiReferenceExtractor.java:47)
	org.xwiki.url.internal.standard.entity.BinEntityResourceReferenceResolver.extractWikiReference(BinEntityResourceReferenceResolver.java:51)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:87)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:50)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:61)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:47)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:65)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:43)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:93)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:48)
	com.xpn.xwiki.XWiki.initializeResourceFromURL(XWiki.java:1119)
	com.xpn.xwiki.XWiki.getXWiki(XWiki.java:971)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:429)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:339)
	com.xpn.xwiki.web.LegacyActionServlet.service(LegacyActionServlet.java:108)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:122)
	org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:61)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
	org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)
	org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
Root Cause

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.
	com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174)
	com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64)
	com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:815)
	com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:438)
	com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:241)
	com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:189)
	org.apache.commons.dbcp2.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:52)
	org.apache.commons.dbcp2.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:414)
	org.apache.commons.dbcp2.BasicDataSource.validateConnectionFactory(BasicDataSource.java:113)
	org.apache.commons.dbcp2.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:629)
	org.apache.commons.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:535)
	org.apache.commons.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:711)
	com.xpn.xwiki.store.DBCPConnectionProvider.configure(DBCPConnectionProvider.java:225)
	org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:107)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:255)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:223)
	org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.buildJdbcConnectionAccess(JdbcEnvironmentInitiator.java:146)
	org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:66)
	org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35)
	org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:101)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:272)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:246)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:223)
	org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:175)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:295)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:252)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:223)
	org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:173)
	org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:127)
	org.hibernate.boot.model.process.spi.MetadataBuildingProcess.build(MetadataBuildingProcess.java:86)
	org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:479)
	org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:85)
	com.xpn.xwiki.internal.store.hibernate.HibernateStore.createSessionFactory(HibernateStore.java:275)
	com.xpn.xwiki.internal.store.hibernate.HibernateStore.build(HibernateStore.java:363)
	com.xpn.xwiki.internal.store.hibernate.HibernateStore.initHibernate(HibernateStore.java:290)
	com.xpn.xwiki.store.XWikiHibernateBaseStore.checkHibernateSynchronized(XWikiHibernateBaseStore.java:481)
	com.xpn.xwiki.store.XWikiHibernateBaseStore.checkHibernate(XWikiHibernateBaseStore.java:474)
	com.xpn.xwiki.store.XWikiHibernateStore.loadXWikiDoc(XWikiHibernateStore.java:1037)
	com.xpn.xwiki.store.XWikiCacheStore.loadXWikiDoc(XWikiCacheStore.java:399)
	com.xpn.xwiki.XWiki.getDocument(XWiki.java:2195)
	com.xpn.xwiki.XWiki.getDocument(XWiki.java:2257)
	com.xpn.xwiki.XWiki.getXClass(XWiki.java:7065)
	com.xpn.xwiki.XWiki.getClass(XWiki.java:7078)
	com.xpn.xwiki.doc.DefaultDocumentAccessBridge.isPropertyCustomMapped(DefaultDocumentAccessBridge.java:559)
	org.xwiki.query.xwql.internal.QueryContext$PropertyInfo.isCustomMapped(QueryContext.java:153)
	org.xwiki.query.xwql.internal.QueryContext$ObjectInfo.isCustomMapped(QueryContext.java:122)
	org.xwiki.query.xwql.internal.hql.ObjectPrinter.print(ObjectPrinter.java:37)
	org.xwiki.query.xwql.internal.hql.Printer.print(Printer.java:70)
	org.xwiki.query.xwql.internal.hql.XWQLtoHQLTranslator.translate(XWQLtoHQLTranslator.java:61)
	org.xwiki.query.xwql.internal.XWQLQueryExecutor.execute(XWQLQueryExecutor.java:90)
	org.xwiki.query.internal.DefaultQueryExecutorManager.execute(DefaultQueryExecutorManager.java:72)
	org.xwiki.query.internal.DefaultQuery.execute(DefaultQuery.java:306)
	org.xwiki.wiki.internal.descriptor.document.DefaultWikiDescriptorDocumentHelper.findXWikiServerClassDocumentReference(DefaultWikiDescriptorDocumentHelper.java:121)
	org.xwiki.wiki.internal.descriptor.document.DefaultWikiDescriptorDocumentHelper.findXWikiServerClassDocument(DefaultWikiDescriptorDocumentHelper.java:140)
	org.xwiki.wiki.internal.descriptor.DefaultWikiDescriptorManager.getByAlias(DefaultWikiDescriptorManager.java:161)
	org.xwiki.url.internal.standard.AbstractWikiReferenceExtractor.getWikiDescriptorByAlias(AbstractWikiReferenceExtractor.java:80)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.resolveDomainBasedWikiReference(DomainWikiReferenceExtractor.java:61)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.extract(DomainWikiReferenceExtractor.java:47)
	org.xwiki.url.internal.standard.entity.BinEntityResourceReferenceResolver.extractWikiReference(BinEntityResourceReferenceResolver.java:51)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:87)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:50)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:61)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:47)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:65)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:43)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:93)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:48)
	com.xpn.xwiki.XWiki.initializeResourceFromURL(XWiki.java:1119)
	com.xpn.xwiki.XWiki.getXWiki(XWiki.java:971)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:429)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:339)
	com.xpn.xwiki.web.LegacyActionServlet.service(LegacyActionServlet.java:108)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:122)
	org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:61)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
	org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)
	org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
Root Cause

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.
	jdk.internal.reflect.GeneratedConstructorAccessor103.newInstance(Unknown Source)
	java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
	java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Unknown Source)
	java.base/java.lang.reflect.Constructor.newInstance(Unknown Source)
	com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
	com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:104)
	com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:149)
	com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:165)
	com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:88)
	com.mysql.cj.NativeSession.connect(NativeSession.java:120)
	com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:935)
	com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:805)
	com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:438)
	com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:241)
	com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:189)
	org.apache.commons.dbcp2.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:52)
	org.apache.commons.dbcp2.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:414)
	org.apache.commons.dbcp2.BasicDataSource.validateConnectionFactory(BasicDataSource.java:113)
	org.apache.commons.dbcp2.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:629)
	org.apache.commons.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:535)
	org.apache.commons.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:711)
	com.xpn.xwiki.store.DBCPConnectionProvider.configure(DBCPConnectionProvider.java:225)
	org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:107)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:255)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:223)
	org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.buildJdbcConnectionAccess(JdbcEnvironmentInitiator.java:146)
	org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:66)
	org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35)
	org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:101)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:272)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:246)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:223)
	org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:175)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:295)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:252)
	org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:223)
	org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:173)
	org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:127)
	org.hibernate.boot.model.process.spi.MetadataBuildingProcess.build(MetadataBuildingProcess.java:86)
	org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:479)
	org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:85)
	com.xpn.xwiki.internal.store.hibernate.HibernateStore.createSessionFactory(HibernateStore.java:275)
	com.xpn.xwiki.internal.store.hibernate.HibernateStore.build(HibernateStore.java:363)
	com.xpn.xwiki.internal.store.hibernate.HibernateStore.initHibernate(HibernateStore.java:290)
	com.xpn.xwiki.store.XWikiHibernateBaseStore.checkHibernateSynchronized(XWikiHibernateBaseStore.java:481)
	com.xpn.xwiki.store.XWikiHibernateBaseStore.checkHibernate(XWikiHibernateBaseStore.java:474)
	com.xpn.xwiki.store.XWikiHibernateStore.loadXWikiDoc(XWikiHibernateStore.java:1037)
	com.xpn.xwiki.store.XWikiCacheStore.loadXWikiDoc(XWikiCacheStore.java:399)
	com.xpn.xwiki.XWiki.getDocument(XWiki.java:2195)
	com.xpn.xwiki.XWiki.getDocument(XWiki.java:2257)
	com.xpn.xwiki.XWiki.getXClass(XWiki.java:7065)
	com.xpn.xwiki.XWiki.getClass(XWiki.java:7078)
	com.xpn.xwiki.doc.DefaultDocumentAccessBridge.isPropertyCustomMapped(DefaultDocumentAccessBridge.java:559)
	org.xwiki.query.xwql.internal.QueryContext$PropertyInfo.isCustomMapped(QueryContext.java:153)
	org.xwiki.query.xwql.internal.QueryContext$ObjectInfo.isCustomMapped(QueryContext.java:122)
	org.xwiki.query.xwql.internal.hql.ObjectPrinter.print(ObjectPrinter.java:37)
	org.xwiki.query.xwql.internal.hql.Printer.print(Printer.java:70)
	org.xwiki.query.xwql.internal.hql.XWQLtoHQLTranslator.translate(XWQLtoHQLTranslator.java:61)
	org.xwiki.query.xwql.internal.XWQLQueryExecutor.execute(XWQLQueryExecutor.java:90)
	org.xwiki.query.internal.DefaultQueryExecutorManager.execute(DefaultQueryExecutorManager.java:72)
	org.xwiki.query.internal.DefaultQuery.execute(DefaultQuery.java:306)
	org.xwiki.wiki.internal.descriptor.document.DefaultWikiDescriptorDocumentHelper.findXWikiServerClassDocumentReference(DefaultWikiDescriptorDocumentHelper.java:121)
	org.xwiki.wiki.internal.descriptor.document.DefaultWikiDescriptorDocumentHelper.findXWikiServerClassDocument(DefaultWikiDescriptorDocumentHelper.java:140)
	org.xwiki.wiki.internal.descriptor.DefaultWikiDescriptorManager.getByAlias(DefaultWikiDescriptorManager.java:161)
	org.xwiki.url.internal.standard.AbstractWikiReferenceExtractor.getWikiDescriptorByAlias(AbstractWikiReferenceExtractor.java:80)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.resolveDomainBasedWikiReference(DomainWikiReferenceExtractor.java:61)
	org.xwiki.url.internal.standard.DomainWikiReferenceExtractor.extract(DomainWikiReferenceExtractor.java:47)
	org.xwiki.url.internal.standard.entity.BinEntityResourceReferenceResolver.extractWikiReference(BinEntityResourceReferenceResolver.java:51)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:87)
	org.xwiki.url.internal.standard.entity.AbstractEntityResourceReferenceResolver.resolve(AbstractEntityResourceReferenceResolver.java:50)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:61)
	org.xwiki.url.internal.GenericResourceReferenceResolver.resolve(GenericResourceReferenceResolver.java:47)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:65)
	org.xwiki.url.internal.standard.StandardExtendedURLResourceReferenceResolver.resolve(StandardExtendedURLResourceReferenceResolver.java:43)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:93)
	org.xwiki.url.internal.DefaultResourceReferenceResolver.resolve(DefaultResourceReferenceResolver.java:48)
	com.xpn.xwiki.XWiki.initializeResourceFromURL(XWiki.java:1119)
	com.xpn.xwiki.XWiki.getXWiki(XWiki.java:971)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:429)
	com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:339)
	com.xpn.xwiki.web.LegacyActionServlet.service(LegacyActionServlet.java:108)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:122)
	org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:61)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
	org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)
	org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
Note The full stack trace of the root cause is available in the server logs.

Apache Tomcat/9.0.87
```