Issue #1840: [ObjectDB 2.6.7_04] Unexpected exception (Error 990)

Since Version 2.6.7_04 we get the following NullPointerException at Query execution:

[ObjectDB 2.6.7_04] Unexpected exception (Error 990)
Generated by Java HotSpot(TM) Client VM 1.8.0_51 (on Windows 7 6.1).
Please report this error on http://www.objectdb.com/database/issue/new
com.objectdb.o.InternalException: java.lang.NullPointerException: null
java.lang.NullPointerException
at com.objectdb.o.MMM.aj(MMM.java:1147)
at com.objectdb.o.UTY.aC(UTY.java:1307)
at com.objectdb.o.UTY.aB(UTY.java:1296)
at com.objectdb.o.ENH.d(ENH.java:231)
at com.objectdb.o.ENT.aa(ENT.java:915)
at com.objectdb.o.STA.X(STA.java:585)
at com.objectdb.o.STM.H(STM.java:502)
at com.objectdb.o.OBM.bP(OBM.java:918)
at com.objectdb.o.OBM.bO(OBM.java:787)
at com.objectdb.o.QRR.f(QRR.java:139)
at com.objectdb.jpa.JpaQuery.getResultList(JpaQuery.java:719)
at com.btc.ep.base.dal.internal.services.PersistenceUtilityServiceImpl.getModelElementsByQuery(PersistenceUtilityServiceImpl.java:167)

Thank you for this report.

The stack trace indicates an unexpected condition at the end of a flush operation (before executing a query).

It doesn't seem related particularly to build 2.6.7_04 or other recent builds, but to issue #1818, that was already fixed. It is unclear why the previous fix is not working, but build 2.6.7_05 includes some addition that maybe can help.

2.6.7_05 works correct.

Thank you for the fix.