Coding⏱️ 2 min read📅 2026-05-31

How to Fix: How to fix Hibernate LazyInitializationException: failed to lazily initialize a collection of roles, could not initialize proxy - no Session

Fix Hibernate LazyInitializationException by disabling lazy initialization or setting discriminator type to transient.

Quick Answer: Use @LazyInitializationEnabled(false) on your Hibernate session or set the property hibernate.discriminator_type to 'transient' in your application.properties file.

📋 Table of Contents

  1. ✅ Best Solutions to Fix It
  2. 🎯 Final Words

The Hibernate LazyInitializationException occurs when you try to access a lazy-loaded property outside of the session context. This happens because the proxy object is not initialized until it's within the session.

✅ Best Solutions to Fix It

Method 1: Eager Loading of the Collection

  1. Step 1: Add @Fetch(FetchMode.JOIN) annotation to the lazy-loaded property in your entity.

Method 2: Creating a Joiner

  1. Step 1: Create a joiner that fetches the user's roles and authorities when needed.

🎯 Final Words

To avoid this exception, you can use either eager loading of the collection or create a joiner to fetch the required data. Both methods are effective and should be used depending on your specific requirements.

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