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Error using query with MAX() function

.setChangeDate(new Date(System.currentTimeMillis())); em.getTransaction().commit(); em ... = (Date)tq.getSingleResult(); em.getTransaction().commit(); System.out.println("MaxDate ... . Hawks There seems to be a link between how often I commit and the results of success or failure. If I

Optimistic locking: prevent version increment on entity collection attribute

);        em.getTransaction().commit();        Document tmpDoc = em.find(Document.class, doc.getId ... constructor and we are still in the same transaction (before any commit or rollback). In the debugger ... a document, adds 2 Readings to it and commits the transaction. - I then clear the EntityManager so I

Error 613 - i cant put a list<Athlete> into a Squad object

.RollbackException Failed to commit transaction: Failed to write the value of field test.Squad ... 613) at com.objectdb.jpa.EMImpl.commit(EMImpl.java:259) at test.Main.main(Main.java:25) Caused by ... ) at com.objectdb.o.OBM.bD(OBM.java:711) at com.objectdb.jpa.EMImpl.commit(EMImpl.java:256) ... 1


")) transaction.commit() } @Entity class Address{ String street } Fantom using [java] javax.persistence ... {street = "Fantom"}) getTransaction.commit } } } @Entity class Address{ Str? street ... .o._RollbackException: Failed to commit transaction: Failed to get reference value of field field

Different behavior with persist() and queried instances?

persist works though in a sample project, *after* the commit, my list property is correctly enhanced ... : After the commit and persist calls I do close the entity manager so my object gets detached. Between the persist() and the commit() call, my list property seems to be correctly tracked as it includes

Items in list are doubled, when the entity class is not enhanced

(); for(Object o : l){ em.remove(o); } em.getTransaction().commit(); l ... (); for(Object o : l){ em.remove(o); } em.getTransaction().commit ... .persist(c); em.getTransaction().commit(); em.refresh(c); em

Eclipse plugin problem (using ObjectDB as a separate bundle)

.EMImpl.commit(EMImpl.java:277) at javax.jdo.Transaction$commit.call(Unknown Source) at org.codehaus ... the problem. I noticed that the third line in the stack trace at com.objectdb.jpa.EMImpl.commit ... . Please try changing the configuration: <cascade-persist always="true" on-persist="false" on-commit

ArrayIndexOutOfBoundsException on flush

().commit(); } catch(Exception e) { if(em.getTransaction().isActive()) em.getTransaction ... into a commit retry loop which blew out the logs: Attempt to commit a transaction after failure in ... .PersistenceException Attempt to commit a transaction after failure in writing to database file 'F

InternalException during producer/consumer scenario

) Caused by: com.objectdb.o._RollbackException: Failed to commit transaction: Unexpected internal exception ... .onObjectDBError(OBC.java:1386) at com.objectdb.jpa.EMImpl.commit(EMImpl.java:259) at rbccm.felix ... .java:711) at com.objectdb.jpa.EMImpl.commit(EMImpl.java:256) ... 4 more Caused by: java.lang

Server out of memory exceptions

an embedded database: [ObjectDB 2.2.8] javax.persistence.RollbackException Failed to commit transaction: Attempt to commit a transaction after failure in writing to database file 'F:\calculationservice\objectdb\dbs\admin\WorkflowHistory.odb' (error 613) at com.objectdb.jpa.EMImpl.commit(EMImpl.java:277

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Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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