manolan ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiMDU5OTA3NDcx... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16134?atlOrigin=eyJpIjoiMDU5OT... ) HHH-16134 ( https://hibernate.atlassian.net/browse/HHH-16134?atlOrigin=eyJpIjoiMDU5OT... ) Deploying Hibernate on WAS 8.5.5 tries to use Liberty JTA Platform ( https://hibernate.atlassian.net/browse/HHH-16134?atlOrigin=eyJpIjoiMDU5OT... ) Issue Type: Bug Affects Versions: 5.3.23 Assignee: Unassigned Components: hibernate-core Created: 03/Feb/2023 05:39 AM Environment: WAS 8.5.5.22 Priority: Major Reporter: manolan ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) When upgrading some old applications to Hibernate 5, we have encountered a problem where Hibernate tries to use the Liberty JTA Platform: o.s.o.h.SpringSessionContext - Could not introspect Hibernate JtaPlatform for SpringJtaSessionContext org.hibernate.engine.transaction.jta.platform.spi.JtaPlatformException: Could not obtain WebSphere Liberty transaction manager instance         at org.hibernate.engine.transaction.jta.platform.internal.WebSphereLibertyJtaPlatform.locateTransactionManager(WebSphereLibertyJtaPlatform.java:42) I can override this by setting hibernate.transaction.jta.platform directly. Looking at *StandardJtaPlatformResolver* source code, I can see that it looks first for the existence of a class com.ibm.tx.jta.TransactionManagerFactory and, if it finds it, chooses to use Liberty. At a guess, I would say this check is flawed and this class is found in Websphere 8.5.5.x not just in the Liberty profile. ( https://hibernate.atlassian.net/browse/HHH-16134#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16134#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#100214- sha1:6115380 )