Solution : https://service.sap.com/sap/support/notes/1683425 (SAP Service marketplace login required)
Key words : 
integrated oracle jdk 6u31 updates, loop counter register incorrectly decremented, indexof assembly part continued, service implementation classes turned, string_indexof assembly code, symptom sap jvm 6, xml string contained, sap jvm patch, 1 patch collection 33 relates, synchronized native method
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