spring - OAuth2 causes Tomcat exceptions -

i tried implement oauth2 maven project. after adding dependency follows:

    <dependency>         <groupid>org.springframework.security.oauth</groupid>         <artifactid>spring-security-oauth2</artifactid>         <version>${springsecurityoauth2.version}</version>     </dependency> 

tomcat throws numerous exceptions:

severe: child container failed during start java.util.concurrent.executionexception: org.apache.catalina.lifecycleexception: failed start component [standardengine[catalina].standardhost[localhost].standardcontext[/springsecurityoauth2example]]     @ java.util.concurrent.futuretask.report(futuretask.java:122)     @ java.util.concurrent.futuretask.get(futuretask.java:192)     @ org.apache.catalina.core.containerbase.startinternal(containerbase.java:939)     @ org.apache.catalina.core.standardhost.startinternal(standardhost.java:872)     @ org.apache.catalina.util.lifecyclebase.start(lifecyclebase.java:150)     @ org.apache.catalina.core.containerbase$startchild.call(containerbase.java:1419)     @ org.apache.catalina.core.containerbase$startchild.call(containerbase.java:1409)     @ java.util.concurrent.futuretask.run(futuretask.java:266)     @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1142)     @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:617)     @ java.lang.thread.run(thread.java:745) caused by: org.apache.catalina.lifecycleexception: failed start component [standardengine[catalina].standardhost[localhost].standardcontext[/springsecurityoauth2example]]     @ org.apache.catalina.util.lifecyclebase.start(lifecyclebase.java:167)     ... 6 more 

. . . . , more...

any ideas wrong??

my code:

@configuration @enableglobalmethodsecurity(prepostenabled = true, proxytargetclass = true) public class methodsecurityconfig extends globalmethodsecurityconfiguration {      @suppresswarnings("unused")     @autowired     private oauth2securityconfiguration securityconfig;      @override     protected methodsecurityexpressionhandler createexpressionhandler() {         return new oauth2methodsecurityexpressionhandler();     } }   @configuration @enablewebsecurity public class oauth2securityconfiguration extends websecurityconfigureradapter {      @autowired     private clientdetailsservice clientdetailsservice;      @autowired     public void globaluserdetails(authenticationmanagerbuilder auth) throws exception {         auth.inmemoryauthentication()         .withuser("bill").password("abc123").roles("admin").and()         .withuser("bob").password("abc123").roles("user");     }      @override     protected void configure(httpsecurity http) throws exception {         http         .csrf().disable()         .anonymous().disable()         .authorizerequests()         .antmatchers("/oauth/token").permitall();     }      @override     @bean     public authenticationmanager authenticationmanagerbean() throws exception {         return super.authenticationmanagerbean();     }       @bean     public tokenstore tokenstore() {         return new inmemorytokenstore();     }      @bean     @autowired     public tokenstoreuserapprovalhandler userapprovalhandler(tokenstore tokenstore){         tokenstoreuserapprovalhandler handler = new tokenstoreuserapprovalhandler();         handler.settokenstore(tokenstore);         handler.setrequestfactory(new defaultoauth2requestfactory(clientdetailsservice));         handler.setclientdetailsservice(clientdetailsservice);         return handler;     }      @bean     @autowired     public approvalstore approvalstore(tokenstore tokenstore) throws exception {         tokenapprovalstore store = new tokenapprovalstore();         store.settokenstore(tokenstore);         return store;     }  }    @configuration @enableresourceserver public class resourceserverconfiguration extends resourceserverconfigureradapter {      private static final string resource_id = "my_rest_api";    @override     public void configure(resourceserversecurityconfigurer resources) {         resources.resourceid(resource_id).stateless(false);     }      @override     public void configure(httpsecurity http) throws exception {         http.         anonymous().disable()         .requestmatchers().antmatchers("/user/**")         .and().authorizerequests()         .antmatchers("/user/**").access("hasrole('admin')")         .and().exceptionhandling().accessdeniedhandler(new oauth2accessdeniedhandler());     }  } public class securitywebapplicationinitializer extends abstractsecuritywebapplicationinitializer {  }   @configuration @enableauthorizationserver public class authorizationserverconfiguration extends authorizationserverconfigureradapter {      private static string realm="my_oauth_realm";      @autowired     private tokenstore tokenstore;      @autowired     private userapprovalhandler userapprovalhandler;      @autowired     @qualifier("authenticationmanagerbean")     private authenticationmanager authenticationmanager;      @override     public void configure(clientdetailsserviceconfigurer clients) throws exception {          clients.inmemory()             .withclient("my-trusted-client")             .authorizedgranttypes("password", "authorization_code", "refresh_token", "implicit")             .authorities("role_client", "role_trusted_client")             .scopes("read", "write", "trust")             .secret("secret")             .accesstokenvalidityseconds(120).//access token valid 2 minutes.             refreshtokenvalidityseconds(600);//refresh token valid 10 minutes.     }      @override     public void configure(authorizationserverendpointsconfigurer endpoints) throws exception {         endpoints.tokenstore(tokenstore).userapprovalhandler(userapprovalhandler)                 .authenticationmanager(authenticationmanager);     }      @override     public void configure(authorizationserversecurityconfigurer oauthserver) throws exception {         oauthserver.realm(realm+"/client");     }  }