Exception message: Exception [EclipseLink-67] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: Could not serialize object into byte array.
Internal Exception: java.io.NotSerializableException: org.eclipse.persistence.internal.jpa.EntityManagerImpl
Mapping: org.eclipse.persistence.mappings.DirectToFieldMapping[manager-->SIST_PERS_IMPORT.MANAGER]
Descriptor: RelationalDescriptor(de.uulm.kiz.mssql.SIST_Pers_Import --> [DatabaseTable(SIST_PERS_IMPORT)])