Solution : https://service.sap.com/sap/support/notes/865290 (SAP Service marketplace login required)
Key words : 
running <instance_dir>/j2ee/admin/go3, double stack unix systems, /jcontrol -dsapstart=1 pf=<central_instance_profile>2, visual admin tool, netweaver 2004s java, licensing adapter service, terms netweaver upgrade, failed upgrade phase, sdm deployment log, upgrade phase deploy_online
Related Notes : 
       
| 981804 | Add. info. on upgrading to SAP SRM LAC 6.0 | 
| 970039 | Add. info. on upgrading to SAP NW 7.0 SR2 Java | 
| 922454 | Add. info. on upgrading to SAP SCM 5.0 SR1 Java | 
| 918921 | Add. info. on upgrading to SAP ERP Java Components 6.0 SR1 | 
| 918849 | Add. info. on upgrading to SAP CRM Java Comp. 5.0 SR1 | 
| 913972 | Add. info. on upgrading to SAP NW 7.0 SR1 Java | 
| 836198 | Add. info. on upgrading to SAP NW 7.0 Java |