Solution : https://service.sap.com/sap/support/notes/137607 (SAP Service marketplace login required)
Key words : 
jar    uaserver   jre -nojit -ss256k -cp /usr/sap/put/ua/uagui, jre -nojit -ss256k -cp /usr/sap/put/ua/ua, jre -version, additional key words, java virtual machine, jar uaguiyou, stack overflow exception, stack overflow occurs, /3 upgrade assistant triggers, stack overflow
Related Notes : 
       
| 435140 | Additional information on upgrading to Basis 4.6D (APO 3.1x | 
| 420371 | Add. info on upgrading to Basis 4.6C SR2 (NDI upgrade) | 
| 390062 | Additional information about upgrading to 4.6C SR2 | 
| 329622 | Additions: Upgrading to Basis 4.6C SR1 (NDI upgrade) | 
| 327285 | Additions to upgrade to 4.6C SR1 | 
| 304597 | Additions to upgrade to Release 4.6C FCS | 
| 208975 | Additions to upgrade on Basis of 4.6C (NDI upgrade) | 
| 192949 | Additional info for upgrade to 4.6C | 
| 179373 | Additional info for upgrade to Rel.4.6B | 
| 151833 | Additional Info: Upgrading to FCS 4.5B | 
| 147337 | Additional info for upgrade to Release 4.0B SR | 
| 117668 | Additional info: Upgrading to 4.5B | 
| 116251 | Additions upgrade to Basis 4.5A (comp.system) |