LazyInitializationException threw when persist a Many to Many collection of an entity. -------------------------------------------------------------------------------------- Key: SEAMPERSIST-67 URL: https://issues.jboss.org/browse/SEAMPERSIST-67 Project: Seam Persistence Issue Type: Bug Environment: Java 6 update 27, Seam 3.1.0Beta2, JBoss 7.0.1.Final Reporter: hantsy bai Priority: Critical I tried a saved a many to many relation(multicheckbox), but failed. But in before seam 2 application, I used like this, never encounter such a problem. I used Seam managed Persistence, and added TransactionIntercepter in the beans.xml. Please refer the discussion in the forum.