I have a huge amount of inserts/updates and after a about 850.000 Entities I got the following error:
[ObjectDB 2.4.7_16] Unexpected exception (Error 990) Generated by Java HotSpot(TM) 64-Bit Server VM 1.6.0_30 (on Windows 7 6.1). Please report this error on http://www.objectdb.com/database/issue/new com.objectdb.o.InternalException: null com.objectdb.o.InternalException at com.objectdb.o.VUT.k(VUT.java:691) at com.objectdb.o.VUT.j(VUT.java:360) at com.objectdb.o.STV.J(STV.java:309) at com.objectdb.o.PAG.at(PAG.java:991) at com.objectdb.o.MST.aU(MST.java:483) at com.objectdb.o.MST.aT(MST.java:434) at com.objectdb.o.MST.U3(MST.java:407) at com.objectdb.o.WRA.U3(WRA.java:249) at com.objectdb.o.LDR.F(LDR.java:532) at com.objectdb.o.LDR.E(LDR.java:466) at com.objectdb.o.LDR.z(LDR.java:268) at com.objectdb.o.OBC.aO(OBC.java:1052) at com.objectdb.o.OBC.aM(OBC.java:970) at com.objectdb.jpa.EMImpl.find(EMImpl.java:591) at com.objectdb.jpa.EMImpl.find(EMImpl.java:514) at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:240) at $Proxy33.find(Unknown Source) at local.jpa.mapping.xmlparsing.RepoEbene1a.getEntity(RepoEbene1a.java:46) at local.jpa.mapping.xmlparsing.RepoEbene1a.persist(RepoEbene1a.java:105) at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:319) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202) at $Proxy34.persist(Unknown Source)