Patrick Lübbecke ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=61a7428... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiZTFlYTg0YzJj... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-15553?atlOrigin=eyJpIjoiZTFlYT... ) HHH-15553 ( https://hibernate.atlassian.net/browse/HHH-15553?atlOrigin=eyJpIjoiZTFlYT... ) Not possible to fetch content from mapping tables, that only have <composite-id> attributes. ( https://hibernate.atlassian.net/browse/HHH-15553?atlOrigin=eyJpIjoiZTFlYT... ) Change By: Patrick Lübbecke ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=61a7428... ) *My mapping* {noformat}<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping> <class table="CompId" name="org.hibernate.bugs.CompIdVOImpl" proxy="org.hibernate.bugs.CompIdVO"> <composite-id> <key-property name="id1" column="id1" length="32" type="string"/> <key-property name="id2" column="id2" length="32" type="string"/> </composite-id> </class> </hibernate-mapping> {noformat} *The entity interface:* {noformat}package org.hibernate.bugs; public interface CompIdVO { public String getId1(); public void setId1(String id1); public String getId2(); public void setId2(String id2); }{noformat} *The entity implementation:* {noformat}package org.hibernate.bugs; import java.io.Serializable; public class CompIdVOImpl implements CompIdVO, Serializable { private String id1; private String id2; public CompIdVOImpl() { } public CompIdVOImpl(String id1, String id2) { this.id1 = id1; this.id2 = id2; } @Override public String getId1() { return id1; } @Override public void setId1(String id1) { this.id1 = id1; } @Override public String getId2() { return id2; } @Override public void setId2(String id2) { this.id2 = id2; } }{noformat} The error: {noformat}  CriteriaBuilder cb = session.getCriteriaBuilder(); CriteriaQuery cq = cb.createQuery(CompIdVOImpl.class); Root root = cq.from(CompIdVOImpl.class); List<Predicate> predicates = new ArrayList<>(); predicates.add(cb.equal(root.get("id1"), "1")); predicates.add(cb.equal(root.get("id2"), "2")); cq.where(cb.and(predicates.toArray(new Predicate[0]))); Query query = session.createQuery(cq); List<CompIdVO> entities = query.getResultList();{noformat} Results in this error: {noformat}java.lang.IllegalArgumentException: Unable to locate Attribute  with the the given name [id1] on this ManagedType [org.hibernate.bugs.CompIdVOImpl] at org.hibernate.metamodel.model.domain.internal.AbstractManagedType.checkNotNull(AbstractManagedType.java:148) at org.hibernate.metamodel.model.domain.internal.AbstractManagedType.getAttribute(AbstractManagedType.java:119) at org.hibernate.metamodel.model.domain.internal.AbstractManagedType.getAttribute(AbstractManagedType.java:44) at org.hibernate.query.criteria.internal.path.AbstractFromImpl.locateAttributeInternal(AbstractFromImpl.java:111) at org.hibernate.query.criteria.internal.path.AbstractPathImpl.locateAttribute(AbstractPathImpl.java:204) at org.hibernate.query.criteria.internal.path.AbstractPathImpl.get(AbstractPathImpl.java:177) at org.hibernate.bugs.CompositeIdTest.testImplicitCompositeIdInDynamicMapMode(CompositeIdTest.java:52){noformat} That is pretty much a blocker for us. Christian Beikov mentioned that this problem [might already be fixed in 6.0|https://stackoverflow.com/questions/73851482/java-lang-illegalargumen...]. I’d like to try to back port this fix to 5.6. Does anybody know which PR was relevant here? *Here is a test case for the problem:* [^CompositeId (da4be8f3-7b63-42c2-85e3-f7dc6899b6f1).zip] ( https://hibernate.atlassian.net/browse/HHH-15553#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-15553#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100209- sha1:392b984 )