This can only be reproduce if there is no Internet connection. This problem may relate to the update of newest Hibernate version
26836 [localhost-startStop-1] INFO exo.core.component.database.HibernateServiceImpl - Adding Hibernate Mapping: picketlink-idm/mappings/HibernateRealm.hbm.xml
26879 [localhost-startStop-1] ERROR exo.core.component.database.HibernateServiceImpl - Unable to read XML
org.hibernate.InvalidMappingException: Unable to read XML
at org.hibernate.internal.util.xml.MappingReader.readMappingDocument(MappingReader.java:109)
at org.hibernate.cfg.Configuration.add(Configuration.java:478)
at org.hibernate.cfg.Configuration.add(Configuration.java:474)
at org.hibernate.cfg.Configuration.add(Configuration.java:647)
at org.hibernate.cfg.Configuration.addURL(Configuration.java:636)
at org.exoplatform.services.database.impl.HibernateServiceImpl.addPlugin(HibernateServiceImpl.java:121)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)