Réda Housni Alaoui ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *commented* on HHH-14948 ( https://hibernate.atlassian.net/browse/HHH-14948?atlOrigin=eyJpIjoiNGQ4ND... ) Re: Metamodel imports cache increases indefinitely for dynamically generated HQL aliases eventually leading to an OOM ( https://hibernate.atlassian.net/browse/HHH-14948?atlOrigin=eyJpIjoiNGQ4ND... ) I was already aware of the explanation of https://github.com/hibernate/hibernate-orm/pull/4411#issuecomment-989304639 ( https://github.com/hibernate/hibernate-orm/pull/4411#issuecomment-989304639 ). It still did not make sense to me. What was the cost of adding at least a configuration? Why not keep the default value for 5.6.x ? Why not adding this to the release note as a breaking change with all the blinking lights? I am sure, the use case reported here is only representative of a small minority of Hibernate users. If I appeared not nice, it is probably because I think the decision derived from the explanation is a mistake. https://hibernate.atlassian.net/browse/HHH-15100 ( https://hibernate.atlassian.net/browse/HHH-15100 ) was created by someone else on march and received zero answer. Moreover, I am not among the kind of people who asks OSS maintainers then wait. I immediatly created a pull request yesterday for https://hibernate.atlassian.net/browse/HHH-15100 ( https://hibernate.atlassian.net/browse/HHH-15100 ). The map contains 1318 entries on application startup before any query. The keys are either JPA entities simple name (like “product” for “Product”) or full qualified name (like “org.example.Product”). We don’t use any query string. But we have a massive usage of JPA CriteriaQuery generating tokens like “from” or “generatedAlias0.product”. Since the current fix, those false positives never make it to the map because of the 1000 entries limit. So each false positive generate one call to Class.forName(). Given the knowledge we had on December 2021 and potential performance implication on huge applications (the ones precisely needing performance optimization), I will keep saying that this ticket was very badly managed. This happens to everybody so please do not hold a grudge against me if you don’t agree. ( https://hibernate.atlassian.net/browse/HHH-14948#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-14948#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#100205- sha1:5460ff5 )