hibernate - No session found for current thread in Custom AuthenticationProvider -

i'm new in grails , i'm trying make own authenticationprovider security core plugin, problem i'm getting follow error when try return token

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could not obtain current hibernate session; nested exception org.hibernate.hibernateexception: no session found current thread

this authenticationprovider code:

@component public class mycustomauthenticationprovider implements authenticationprovider {  @override public authentication authenticate(authentication authentication) throws authenticationexception {      string name = authentication.getname();     string password = authentication.getcredentials().tostring()     def user user     user.withtransaction {         status ->user = user.findbyusername(name);         if(! user.springsecurityservice.ispasswordvalid(user.getpassword(),password,null)){             throw new badcredentialsexception("bad credentials");         }          // here comes problem when try          return  new usernamepasswordauthenticationtoken(user, user.getpassword(), user.getauthorities1()) ;     } }         @override     public boolean supports(class<?> authentication) {        return authentication.equals(usernamepasswordauthenticationtoken.class);     } } 

my bean declaration (in resources.groovy file) is:

beans = {     mycustomauthenticationprovider (com.security.mycustomauthenticationprovider)    {   } } 

pretty sure, user.getauthorities1() call being lazily loaded outside of session.

you need initialize before session closed. 1 solution replace user.findbyusername(name) call different method initializes property.