Issue

Using the RH-SSO 7.1 standalone cluster mode with the following custom User Storage SPI ¹ is possible to see the error below:

• User Storage SPI

@Stateful
@Local(EjbExampleUserStorageProvider.class)
public class EjbExampleUserStorageProvider implements UserStorageProvider,
        UserLookupProvider,
        UserRegistrationProvider,
        UserQueryProvider,
        CredentialInputUpdater,
        CredentialInputValidator,
        OnUserCache
{
    private static final Logger logger = Logger.getLogger(EjbExampleUserStorageProvider.class);
    public static final String PASSWORD_CACHE_KEY = UserAdapter.class.getName() + ".password";

    @PersistenceContext
    protected EntityManager em;

    protected ComponentModel model;
protected KeycloakSession session;
...
}

• Error

...
Caused by: org.infinispan.commons.marshall.NotSerializableException: org.keycloak.services.DefaultKeycloakSession
Caused by: an exception which occurred:
    in field session
    in field value
    in field instance
    in object java.util.concurrent.ConcurrentHashMap@3769c23c
    in object org.wildfly.clustering.ejb.infinispan.group.InfinispanBeanGroupEntry@65e67da0
    in object org.infinispan.commands.write.PutKeyValueCommand@eeb6ec6e
    in object org.infinispan.commands.tx.PrepareCommand@d8edf297
...