Hi, when we are trying to migrate from ver. 2.6.7_05 to ver. 2.7.4_01 or 2.7.1 we are getting this error, do you have any insight on how to solve this.
Caused by: com.objectdb.o.InternalException: Unexpected internal exception at com.objectdb.o.CLS.T(CLS.java:389) at com.objectdb.o.CLS.S(CLS.java:351) at com.objectdb.o.CLS.R(CLS.java:328) at com.objectdb.o.CLS.Q(CLS.java:289) at com.objectdb.o.CST.Vo(CST.java:634) at com.objectdb.o.QRR.g(QRR.java:247) at com.objectdb.o.QRR.f(QRR.java:153) at com.objectdb.jpa.JpaQuery.getSingleResult(JpaQuery.java:750) at com.example.dao.AplikacijaDAO.isInitialized(AplikacijaDAO.java:36) at com.example.clara1.Clara1UI.initVideoConference(Clara1UI.java:118) at com.example.clara1.Clara1UI.init(Clara1UI.java:65) at com.vaadin.ui.UI.doInit(UI.java:687) at com.vaadin.server.communication.UIInitHandler.getBrowserDetailsUI(UIInitHandler.java:214) at com.vaadin.server.communication.UIInitHandler.synchronizedHandleRequest(UIInitHandler.java:74) at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:41) at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1414) ... 54 more Caused by: com.objectdb.o.UserException: Failed to deserialize (com.objectdb.o.UserException; local class incompatible: stream classdesc serialVersionUID = 7838610279947510067, local class serialVersionUID = 4460369539292383939) at com.objectdb.o.MSG.d(MSG.java:75) at com.objectdb.o.BYR.Y(BYR.java:810) at com.objectdb.o.BYR.Y(BYR.java:749) at com.objectdb.o.CLS.T(CLS.java:383) ... 69 more Caused by: java.io.InvalidClassException: com.objectdb.o.UserException; local class incompatible: stream classdesc serialVersionUID = 7838610279947510067, local class serialVersionUID = 4460369539292383939 at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:616) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1843) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1713) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1843) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1713) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2000) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1535) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422) at com.objectdb.o.BYR.Y(BYR.java:784) ... 71 more