org.hibernate.loader.MultipleBagFetchException: cannot simultaneously fetch multiple bags

Question

Following is my code Here I am using multiple lists to fetch data from database. On fetching data from hql query it is showing exception.

Pojo Class

Answer 1

You can only join-fetch following one relation for an entity (either billPaidDetailses or billProductList).

Consider using lazy associations and loading collections when they are needed, OR using lazy associations and loading collections manually with Hibernate.initialize(..). At least that was the conclusion I came to when I had a similar issue.

Either way it will take more than one query to the database.