gescheitert träge, um eine Sammlung von Rolle zu initialisieren: User.authorities, nicht Proxy initialisieren konnte -

Question

keine Session In meiner Frühling-Boot/Data/JPA-Anwendung habe ich eine folgende Einheit:

@Entity 
@NamedEntityGraph(name = "graph.User", attributeNodes = { @NamedAttributeNode("authorities") }) 
@Table(name = "users") 
public class User extends BaseEntity implements UserDetails { 

    private static final long serialVersionUID = 8884184875433252086L; 

    @Id 
    @SequenceGenerator(name = "users_id_seq", sequenceName = "users_id_seq", allocationSize = 1) 
    @GeneratedValue(strategy = GenerationType.AUTO, generator = "users_id_seq") 
    private Long id; 

    ... 

    @JsonIgnore 
    @ManyToMany(fetch = FetchType.LAZY) 
    @JoinTable(name = "users_authorities", joinColumns = { @JoinColumn(name = "user_id") }, inverseJoinColumns = { @JoinColumn(name = "authority_id") }) 
    private Set<Authority> authorities = new HashSet<Authority>(); 

} 

Das ist mein Frühling AuthenticationService :

@Service 
public class AuthenticationService implements UserDetailsService { 

    @Autowired 
    private UserService userService; 

    @Override 
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException { 

     User user = userService.findByUsername(username); 

     if (user == null) { 
      throw new UsernameNotFoundException(String.format("User %s does not exist!", username)); 
     } 

     return user; 
    } 

} 

Während der Start der Anwendung ich erhalte folgende Ausnahme:

org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.example.common.model.user.User.authorities, could not initialize proxy - no Session 
    at org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:576) 
    at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:215) 
    at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:555) 
    at org.hibernate.collection.internal.AbstractPersistentCollection.read(AbstractPersistentCollection.java:143) 
    at org.hibernate.collection.internal.PersistentSet.iterator(PersistentSet.java:180) 
    at org.springframework.security.authentication.AbstractAuthenticationToken.<init>(AbstractAuthenticationToken.java:61) 
    at org.springframework.security.authentication.UsernamePasswordAuthenticationToken.<init>(UsernamePasswordAuthenticationToken.java:72) 
    at org.springframework.security.authentication.dao.AbstractUserDetailsAuthenticationProvider.createSuccessAuthentication(AbstractUserDetailsAuthenticationProvider.java:224) 
    at org.springframework.security.authentication.dao.AbstractUserDetailsAuthenticationProvider.authenticate(AbstractUserDetailsAuthenticationProvider.java:196) 
    at org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:167) 
    at org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:192) 
    at org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter.attemptAuthentication(UsernamePasswordAuthenticationFilter.java:93) 
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:217) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) 
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:120) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) 
    at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64) 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) 
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:91) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) 
    at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:53) 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) 
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:213) 
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:176) 
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346) 
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) 
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121) 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) 
    at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:103) 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672) 
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500) 
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    at java.lang.Thread.run(Thread.java:745) 

Wie konfiguriere ich meine Anwendung, um User.authorities mit FetchType.LAZY richtig zu behandeln?

Answer 1

Probieren Sie es aus;

In Betrieb;

User user = userService.findByUsername(username); 
user.getAuthorities().size(); //You may need call this line in userService.findByUsername(username); method 

In Benutzer;

public Set<Authority> getAuthorities(){ 
    return authorities; 
}