Solution : https://service.sap.com/sap/support/notes/1008311 (SAP Service marketplace login required)
Key words : 
sap netweaver application server java environments http, lang=en_us&source=swg-ibmjavaisvyou, significant native memory footprint reduction, unlimited strength jurisdiction policy files, request=exclusive+prepwalk-xsoftrefthreshold1the reduction, sap netweaver minimum patch level, filter=java/lang/outofmemoryerror, application server java sr2, terms java virtual machine, introducing missing iiop functionality
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