Hi, I am trying to implement basic keycloak login in my web application, but i cannot start the Jetty server once the adapter has been installed. I have a custom web app that needs to use Fispace keycloak authentiction and I have successfully integrated the Javascript adapter, but I am having trouble with the Jetty adapter. My Jetty version is 9.2.0.M0 Keycloak 1.3.1. Final Keycloak Jetty 9.2 adapter is downloaded from : http://sourceforge.net/projects/keycloak/files/1.3.1.Final/adapters/ Adapter is configured according to: http://keycloak.github.io/docs/userguide/html/ch08.html#jetty9-adapter I use keycloak.json provided from Fispace which is used also with the javascript adapter. But when I try to run jetty, i get the following error: 2015-07-03 10:27:34.047:WARN:oejx.XmlConfiguration:main: Config error at <Set name="authenticator">|???<New class="org.keycloak.adapters.jetty.KeycloakJettyAuthenticator"/>|??</Set> java.lang.NoSuchMethodException: class org.eclipse.jetty.security.ConstraintSecurityHandler.setAuthenticator(class org.keycloak.adapters.jetty.KeycloakJettyAuthenticator) in file:/C:/Users/mrd/AppData/Local/Temp/jetty-0.0.0.0-8080-MVNJettyHello.war-_MVNJettyHello-any-5285823088457280813.dir/webapp/WEB-INF/jetty-web.xml 2015-07-03 10:27:34.047:WARN:oejx.XmlConfiguration:main: Config error at <Get name="securityHandler"><Set name="authenticator">|???<New class="org.keycloak.adapters.jetty.KeycloakJettyAuthenticator"/>|??</Set></Get> java.lang.NoSuchMethodException: class org.eclipse.jetty.security.ConstraintSecurityHandler.setAuthenticator(class org.keycloak.adapters.jetty.KeycloakJettyAuthenticator) in file:/C:/Users/mrd/AppData/Local/Temp/jetty-0.0.0.0-8080-MVNJettyHello.war-_MVNJettyHello-any-5285823088457280813.dir/webapp/WEB-INF/jetty-web.xml 2015-07-03 10:27:34.057:WARN:oejw.WebAppContext:main: Failed startup of context o.e.j.w.WebAppContext@13fcdbd{/MVNJettyHello,file:/C:/Users/mrd/AppData/Local/Temp/jetty-0.0.0.0-8080-MVNJettyHello.war-_MVNJettyHello-any-5285823088457280813.dir/webapp/,STARTING}{C:\jetty\jetty-distribution-9.2.11.v20150529\webapps\MVNJettyHello.war} java.lang.NoSuchMethodException: class org.eclipse.jetty.security.ConstraintSecurityHandler.setAuthenticator(class org.keycloak.adapters.jetty.KeycloakJettyAuthenticator) at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.set(XmlConfiguration.java:582) at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.configure(XmlConfiguration.java:411) at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.get(XmlConfiguration.java:662) at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.configure(XmlConfiguration.java:420) at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.configure(XmlConfiguration.java:298) at org.eclipse.jetty.xml.XmlConfiguration.configure(XmlConfiguration.java:248) at org.eclipse.jetty.webapp.JettyWebXmlConfiguration.configure(JettyWebXmlConfiguration.java:102) at org.eclipse.jetty.webapp.WebAppContext.configure(WebAppContext.java:479) at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1337) at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:741) at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:505) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.eclipse.jetty.deploy.bindings.StandardStarter.processBinding(StandardStarter.java:41) at org.eclipse.jetty.deploy.AppLifeCycle.runBindings(AppLifeCycle.java:186) at org.eclipse.jetty.deploy.DeploymentManager.requestAppGoal(DeploymentManager.java:498) at org.eclipse.jetty.deploy.DeploymentManager.addApp(DeploymentManager.java:146) at org.eclipse.jetty.deploy.providers.ScanningAppProvider.fileAdded(ScanningAppProvider.java:180) at org.eclipse.jetty.deploy.providers.WebAppProvider.fileAdded(WebAppProvider.java:455) at org.eclipse.jetty.deploy.providers.ScanningAppProvider$1.fileAdded(ScanningAppProvider.java:64) at org.eclipse.jetty.util.Scanner.reportAddition(Scanner.java:609) at org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:528) at org.eclipse.jetty.util.Scanner.scan(Scanner.java:391) at org.eclipse.jetty.util.Scanner.doStart(Scanner.java:313) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.eclipse.jetty.deploy.providers.ScanningAppProvider.doStart(ScanningAppProvider.java:150) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.eclipse.jetty.deploy.DeploymentManager.startAppProvider(DeploymentManager.java:560) at org.eclipse.jetty.deploy.DeploymentManager.doStart(DeploymentManager.java:235) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132) at org.eclipse.jetty.server.Server.start(Server.java:387) at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114) at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61) at org.eclipse.jetty.server.Server.doStart(Server.java:354) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.eclipse.jetty.xml.XmlConfiguration$1.run(XmlConfiguration.java:1255) at java.security.AccessController.doPrivileged(Native Method) at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1174) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.jetty.start.Main.invokeMain(Main.java:321) at org.eclipse.jetty.start.Main.start(Main.java:817) at org.eclipse.jetty.start.Main.main(Main.java:112)