Solution : https://service.sap.com/sap/support/notes/878909 (SAP Service marketplace login required)
Key words : 
thread containingcom/sap/engine/core/configuration/impl0/configurationmanagerimpl, <jdk path>/jre/lib/ext directory, <jdk path>/jre/lib/ext/ibmjsseprovider2, /sap/engine/core/configuration/impl0/configurationmanagerimpl, /opt/java/jre/lib/ext/ibmjsseprovider2, /sap/engine/core/configuration/abstractconfigurationmanagerimpl, 4xestacktrace          atcom/sap/engine/boot/fileclassloader, java/util/jar/jarverifier$verifierstream, /sap/engine/core/framework, /sap/engine/boot/fileclassloader
Related Notes : 
       
| 1156185 | Central Note: Upgrade to Systems on SAP NetWeaver 7.1 EHP 1 | 
| 1040363 | Add. info. on upgrading to SAP SCM 5.1 Java | 
| 981804 | Add. info. on upgrading to SAP SRM LAC 6.0 | 
| 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 | 
| 710154 | How to create a thread dump for the J2EE Engine 6.40/7.0 | 
| 710146 | How to change J2EE Engine JVM Settings |