I am doing the following sequence of commands:
{code}
EntityManagerFactory emf = ...;
javax.transaction.TransactionManager transactionManager = ...;
transactionManager.begin();
EntityManager em = emf.createEntityManager();
transactionManager.commit();
transactionManager.begin();
em.joinTransaction(); // causes NPE
transactionManager.commit();
{code}
The call to {{joinTransaction()}} causes a {{NullPointerException}}:
{code}
java.lang.NullPointerException
at org.hibernate.resource.transaction.backend.jta.internal.JtaTransactionCoordinatorImpl.explicitJoin(JtaTransactionCoordinatorImpl.java:136)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.joinTransaction(AbstractEntityManagerImpl.java:1569)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.joinTransaction(AbstractEntityManagerImpl.java:1557)
at org.hibernate.ogm.jpa.impl.OgmEntityManager.joinTransaction(OgmEntityManager.java:561)
...
{code}
The {{physicalTransactionDelegate () }} has been set to null in the {{afterCompletion()}} hook from the first commit.
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