[keycloak-user] Class loading issue when refreshing token

Marko Strukelj mstrukel at redhat.com
Thu Mar 24 05:29:22 EDT 2016 

The stacktrace hides whether this is ClassNotFoundException or
NoClassDefFoundError, so it's possible that TokenService is actually
visible, but not one of its dependencies.

You'll definitely also need to add keycloak-core.jar to your classpath.

On Thu, Mar 24, 2016 at 10:21 AM, Guus der Kinderen <
guus.der.kinderen at gmail.com> wrote:

> Hello cloakees.
>
> I'm having an interesting problem while using the admin-client from 1.9.1.
> Initially, things go well. I can extract data as expected. However, after a
> couple of minutes (I think when the admin-client-token needs refreshing),
> I'm suddenly getting errors: "java.lang.IllegalArgumentException: interface
> org.keycloak.admin.client.token.TokenService is not visible from class
> loader" I added a full stacktrace below.
>
> I find it odd that some functionality does work, but other does not.
> What's causing this? keycloak-admin-client-1.9.1.Final.jar is on the
> classpath, which is where that interface appears to live.
>
> Regards,
>
>   Guus
>
> 2016.03.24 10:18:50 WARN  [Jetty-QTP-AdminConsole-58]:
> org.eclipse.jetty.servlet.ServletHandler - /user-summary.jsp
> javax.ws.rs.ProcessingException: java.lang.IllegalArgumentException:
> interface org.keycloak.admin.client.token.TokenService is not visible from
> class loader
>         at
> org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.invoke(ClientInvocation.java:430)
>         at
> org.jboss.resteasy.client.jaxrs.internal.proxy.ClientInvoker.invoke(ClientInvoker.java:102)
>         at
> org.jboss.resteasy.client.jaxrs.internal.proxy.ClientProxy.invoke(ClientProxy.java:64)
>         at com.sun.proxy.$Proxy26.search(Unknown Source)
>         at
> org.jivesoftware.openfire.plugin.KeycloakUserProvider.getUserCount(KeycloakUserProvider.java:134)
>         at
> org.jivesoftware.openfire.user.UserManager.getUserCount(UserManager.java:263)
>         at
> org.jivesoftware.openfire.admin.user_002dsummary_jsp._jspService(user_002dsummary_jsp.java:107)
>         at
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
>         at
> org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812)
>         at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
>         at
> com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
>         at
> com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
>         at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
>         at
> org.jivesoftware.util.LocaleFilter.doFilter(LocaleFilter.java:76)
>         at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
>         at
> org.jivesoftware.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:53)
>         at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
>         at
> org.jivesoftware.admin.PluginFilter.doFilter(PluginFilter.java:80)
>         at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
>         at
> org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:162)
>         at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
>         at
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
>         at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
>         at
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
>         at
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
>         at
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
>         at
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
>         at
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
>         at
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
>         at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
>         at
> org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
>         at
> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
>         at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
>         at org.eclipse.jetty.server.Server.handle(Server.java:499)
>         at
> org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)
>         at
> org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
>         at
> org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)
>         at
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
>         at
> org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
>         at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.IllegalArgumentException: interface
> org.keycloak.admin.client.token.TokenService is not visible from class
> loader
>         at java.lang.reflect.Proxy$ProxyClassFactory.apply(Proxy.java:581)
>         at java.lang.reflect.Proxy$ProxyClassFactory.apply(Proxy.java:557)
>         at java.lang.reflect.WeakCache$Factory.get(WeakCache.java:230)
>         at java.lang.reflect.WeakCache.get(WeakCache.java:127)
>         at java.lang.reflect.Proxy.getProxyClass0(Proxy.java:419)
>         at java.lang.reflect.Proxy.newProxyInstance(Proxy.java:719)
>         at
> org.jboss.resteasy.client.jaxrs.ProxyBuilder.proxy(ProxyBuilder.java:70)
>         at
> org.jboss.resteasy.client.jaxrs.ProxyBuilder.build(ProxyBuilder.java:122)
>         at
> org.jboss.resteasy.client.jaxrs.internal.ClientWebTarget.proxy(ClientWebTarget.java:74)
>         at
> org.keycloak.admin.client.token.TokenManager.refreshToken(TokenManager.java:100)
>         at
> org.keycloak.admin.client.token.TokenManager.getAccessToken(TokenManager.java:59)
>         at
> org.keycloak.admin.client.token.TokenManager.getAccessTokenString(TokenManager.java:52)
>         at
> org.keycloak.admin.client.resource.BearerAuthFilter.filter(BearerAuthFilter.java:48)
>         at
> org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.invoke(ClientInvocation.java:413)
>         ... 40 more
>
>
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