14:50:36.200 ERROR |            |                                                                                                    | eduler_Worker-10 | o.h.AssertionFailure             | HHH000099: an assertion failure occured (this may indicate a bug in Hibernate, but is more likely due to unsafe use of the session): java.lang.NullPointerException
14:50:36.202 ERROR |            |                                                                                                    | eduler_Worker-10 | i.c.b.c.ExpireCartLineJob        | Can not to cancel cartLine for cart 52ce397d-91f5-43fe-a8d0-027db3ac938d line 71e4995c-15e9-4d7a-acb6-8c9497bdd868 at scheduled Wed Oct 29 03:20:02 VET 2014: Could not commit JPA transaction; nested exception is javax.persistence.RollbackException: Error while committing the transaction
org.springframework.transaction.TransactionSystemException: Could not commit JPA transaction; nested exception is javax.persistence.RollbackException: Error while committing the transaction
	at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:524) ~[spring-orm-4.1.0.RELEASE.jar:4.1.0.RELEASE]
	at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:757) ~[spring-tx-4.1.0.RELEASE.jar:4.1.0.RELEASE]
	at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:726) ~[spring-tx-4.1.0.RELEASE.jar:4.1.0.RELEASE]
	at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:150) ~[spring-tx-4.1.0.RELEASE.jar:4.1.0.RELEASE]
	at id.co.bippo.cart.JpaCartManagerImpl.expireCartLine(JpaCartManagerImpl.java:789) ~[classes/:na]
	at id.co.bippo.cart.ExpireCartLineJob.doExecute(ExpireCartLineJob.java:81) ~[classes/:na]
	at org.soluvas.schedule.TenantJob.execute(TenantJob.java:117) [classes/:na]
	at org.quartz.core.JobRunShell.run(JobRunShell.java:202) ~[quartz-2.2.1.jar:na]
	at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573) ~[quartz-2.2.1.jar:na]
Caused by: javax.persistence.RollbackException: Error while committing the transaction
	at org.hibernate.jpa.internal.TransactionImpl.commit(TransactionImpl.java:94) ~[hibernate-entitymanager-4.3.6.Final.jar:4.3.6.Final]
	at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:515) ~[spring-orm-4.1.0.RELEASE.jar:4.1.0.RELEASE]
	... 8 common frames omitted
Caused by: org.hibernate.AssertionFailure: Unable to perform beforeTransactionCompletion callback
	at org.hibernate.engine.spi.ActionQueue$BeforeTransactionCompletionProcessQueue.beforeTransactionCompletion(ActionQueue.java:721) ~[hibernate-core-4.3.6.Final.jar:4.3.6.Final]
	at org.hibernate.engine.spi.ActionQueue.beforeTransactionCompletion(ActionQueue.java:389) ~[hibernate-core-4.3.6.Final.jar:4.3.6.Final]
	at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:516) ~[hibernate-core-4.3.6.Final.jar:4.3.6.Final]
	at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit(JdbcTransaction.java:105) ~[hibernate-core-4.3.6.Final.jar:4.3.6.Final]
	at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:177) ~[hibernate-core-4.3.6.Final.jar:4.3.6.Final]
	at org.hibernate.jpa.internal.TransactionImpl.commit(TransactionImpl.java:77) ~[hibernate-entitymanager-4.3.6.Final.jar:4.3.6.Final]
	... 9 common frames omitted
Caused by: java.lang.NullPointerException: null
	at org.hibernate.action.internal.EntityVerifyVersionProcess.doBeforeTransactionCompletion(EntityVerifyVersionProcess.java:59) ~[hibernate-core-4.3.6.Final.jar:4.3.6.Final]
	at org.hibernate.engine.spi.ActionQueue$BeforeTransactionCompletionProcessQueue.beforeTransactionCompletion(ActionQueue.java:715) ~[hibernate-core-4.3.6.Final.jar:4.3.6.Final]
	... 14 common frames omitted