I'm afraid I posted the wrong stack trace in my post. This is the correct one:

org.hibernate.exception.GenericJDBCException: could not insert: [ch.gutermann.zonescan.model.SummedMeasurement]
at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:140)
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:128)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2438)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2858)
at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:79)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:267)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:259)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:178)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:51)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1206)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:375)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:137)
at ch.gutermann.zonescan.server.correlation.MeasAveragingTask.run(MeasAveragingTask.java:155)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: org.firebirdsql.jdbc.FBSQLException: I/O Exception. could not close blob: org.firebirdsql.gds.GDSException: unable to allocate memory from operating system
at org.firebirdsql.jdbc.FBBlob.copyBytes(FBBlob.java:516)
at org.firebirdsql.jdbc.field.FBBlobField.copyBytes(FBBlobField.java:265)
at org.firebirdsql.jdbc.field.FBBlobField.flushCachedData(FBBlobField.java:239)
at org.firebirdsql.jdbc.AbstractPreparedStatement.flushFields(AbstractPreparedStatement.java:749)
at org.firebirdsql.jdbc.AbstractPreparedStatement.internalExecute(AbstractPreparedStatement.java:723)
at org.firebirdsql.jdbc.AbstractPreparedStatement.executeUpdate(AbstractPreparedStatement.java:190)
at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeUpdate(NewProxyPreparedStatement.java:105)
at org.hibernate.jdbc.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:46)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2418)
... 14 more


Regards,
Wendel Schaatsbergen.