...
2020-05-12 19:21:54.939:WARN:oejw.WebAppContext:main: Failed startup of context o.e.j.w.WebAppContext@445b295b{iot-web,/iot-web,[file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-iron-list-flow-1.0.0.beta2.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-radio-button-1.0.0-beta2.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-button-2.0.0-beta3.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/flow-push-1.0.0.beta5.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/iron-scroll-target-behavior-2.1.0.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-progress-bar-1.0.0-beta2.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-list-mixin-2.0.0-beta2.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-item-2.0.0-beta3.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-overlay-2.1.0.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-combo-box-4.0.0-beta5.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-tabs-2.0.0-beta3.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-date-picker-flow-1.0.0.beta6.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-split-layout-4.0.0-beta2.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-grid-5.0.0-beta7.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-icons-4.1.3.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/iron-list-2.0.12.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/iron-resizable-behavior-2.1.0.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/flow-client-1.0.0.beta5.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-upload-4.0.0-beta2.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/flow-data-1.0.0.beta5.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/iron-iconset-svg-2.2.0.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/polymer-2.6.0.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-element-mixin-1.0.2.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-themable-mixin-1.1.5.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-grid-flow-1.0.0.beta7.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/webcomponentsjs-1.1.1.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-list-box-1.0.0-beta3.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-notification-1.0.0-beta3.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-form-layout-2.0.0-beta1.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/iron-a11y-announcer-2.1.0.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/iron-meta-2.1.0.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-date-picker-3.0.0-beta5.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/shadycss-1.1.2.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/iron-overlay-behavior-2.3.3.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/iron-a11y-keys-behavior-2.1.0.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/iron-icon-2.1.0.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/iron-fit-behavior-2.1.1.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-dialog-2.0.0-beta2.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-text-field-2.0.0-beta4.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/iron-media-query-2.1.0.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-ordered-layout-1.0.0-beta1.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-control-state-mixin-2.0.3.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/iron-flex-layout-2.0.3.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-lumo-styles-1.0.0-beta3.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-development-mode-detector-1.0.3.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-checkbox-2.0.0-beta2.jar!/META-INF/resources, jar:file:///C:/Users/Admin/AppData/Local/Temp/jetty-0_0_0_0-8080-iot-web_war-_iot-web-any-18265271285866453774.dir/webapp/WEB-INF/lib/vaadin-usage-statistics-1.0.8.jar!/META-INF/resources],UNAVAILABLE}{C:\jetty-distribution-9.4.28.v20200408\webapps\iot-web.war}
java.lang.UnsupportedClassVersionError: Preview features are not enabled for de/mq/iot/authentication/support/LoginView (class file version 58.65535). Try running with '--enable-preview'
	at java.base/java.lang.ClassLoader.defineClass1(Native Method)
	at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017)
	at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:151)
	at java.base/java.net.URLClassLoader.defineClass(URLClassLoader.java:514)
	at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:422)
	at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:416)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:691)
	at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:415)
	at org.eclipse.jetty.webapp.WebAppClassLoader.foundClass(WebAppClassLoader.java:649)
	at org.eclipse.jetty.webapp.WebAppClassLoader.loadAsResource(WebAppClassLoader.java:622)
	at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:534)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
	at org.eclipse.jetty.util.Loader.loadClass(Loader.java:64)
	at org.eclipse.jetty.plus.annotation.ContainerInitializer.callStartup(ContainerInitializer.java:134)
	at org.eclipse.jetty.annotations.ServletContainerInitializersStarter.doStart(ServletContainerInitializersStarter.java:64)
	at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
	at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:341)
	at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1445)
	at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1409)
	at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:838)
	at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:275)
	at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:524)
	at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
	at org.eclipse.jetty.deploy.bindings.StandardStarter.processBinding(StandardStarter.java:46)
	at org.eclipse.jetty.deploy.AppLifeCycle.runBindings(AppLifeCycle.java:188)
	at org.eclipse.jetty.deploy.DeploymentManager.requestAppGoal(DeploymentManager.java:513)
	at org.eclipse.jetty.deploy.DeploymentManager.addApp(DeploymentManager.java:154)
	at org.eclipse.jetty.deploy.providers.ScanningAppProvider.fileAdded(ScanningAppProvider.java:173)
	at org.eclipse.jetty.deploy.providers.WebAppProvider.fileAdded(WebAppProvider.java:441)
	at org.eclipse.jetty.deploy.providers.ScanningAppProvider$1.fileAdded(ScanningAppProvider.java:66)
	at org.eclipse.jetty.util.Scanner.reportAddition(Scanner.java:784)
	at org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:753)
	at org.eclipse.jetty.util.Scanner.scan(Scanner.java:641)
	at org.eclipse.jetty.util.Scanner.doStart(Scanner.java:540)
	at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
	at org.eclipse.jetty.deploy.providers.ScanningAppProvider.doStart(ScanningAppProvider.java:146)
	at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
	at org.eclipse.jetty.deploy.DeploymentManager.startAppProvider(DeploymentManager.java:599)
	at org.eclipse.jetty.deploy.DeploymentManager.doStart(DeploymentManager.java:249)
	at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
	at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)
	at org.eclipse.jetty.server.Server.start(Server.java:407)
	at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:117)
	at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97)
	at org.eclipse.jetty.server.Server.doStart(Server.java:371)
	at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
	at org.eclipse.jetty.xml.XmlConfiguration.lambda$main$1(XmlConfiguration.java:1929)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:554)
	at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1878)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at org.eclipse.jetty.start.Main.invokeMain(Main.java:218)
	at org.eclipse.jetty.start.Main.start(Main.java:491)
	at org.eclipse.jetty.start.Main.main(Main.java:77)
2020-05-12 19:21:54.985:INFO:oejs.AbstractConnector:main: Started ServerConnector@4b45dcb8{HTTP/1.1, (http/1.1)}{0.0.0.0:8080}
2020-05-12 19:21:54.985:INFO:oejs.Server:main: Started @15081ms