hibernate/hibernate-orm · error · HibernateException
Found shared references to a collection: {role}
Error message
Found shared references to a collection: {role} What it means
Error "Found shared references to a collection: {role}" thrown in hibernate/hibernate-orm.
Source
Thrown at hibernate-core/src/main/java/org/hibernate/engine/internal/StatefulPersistenceContext.java:1080
}
}
/**
* Add a collection to the cache, with a given collection entry.
*
* @param coll The collection for which we are adding an entry.
* @param entry The entry representing the collection.
* @param key The key of the collection's entry.
*/
private void addCollection(PersistentCollection<?> coll, CollectionEntry entry, Object key) {
putCollectionEntry( coll, entry );
final var collectionKey = session.generateCollectionKey( entry.getLoadedPersister(), key );
final var old = addCollectionByKey( collectionKey, coll );
if ( old != null ) {
if ( old == coll ) {
throw new AssertionFailure( "bug adding collection twice" );
}
throw new HibernateException(
"Found shared references to a collection: " + collectionKey.getRole()
);
}
}
private void putCollectionEntry(PersistentCollection<?> collection, CollectionEntry entry) {
if ( collectionEntries == null ) {
collectionEntries = new InstanceIdentityMap<>();
}
assert collection.$$_hibernate_getInstanceId() == 0;
collection.$$_hibernate_setInstanceId( nextCollectionInstanceId() );
collectionEntries.put( collection, entry );
}
/**
* Add a collection to the cache, creating a new collection entry for it
*
* @param collection The collection for which we are adding an entry.View on GitHub (pinned to fad1729dce)
Solutions
- Do not share the same collection instance between two owners; create a separate collection per owner
- Clone the collection contents into a new collection for the second owner
When it happens
Trigger: Thrown at hibernate-core/src/main/java/org/hibernate/engine/internal/StatefulPersistenceContext.java:1080 when the library encounters an invalid state.
Common situations: See trigger scenarios.
AI-assisted analysis of hibernate/hibernate-orm@fad1729dce (2026-08-22).
Data as JSON: /api/errors/bbd383ebf75a79b1.
Report an issue: GitHub.