Solution : https://service.sap.com/sap/support/notes/873586 (SAP Service marketplace login required)
Key words :
delete file /usr/sap/<sid>/jc<xx>/j2ee/os_libs/libicuuc, /usr/sap/<sid>/jc<xx>/j2ee/os_libs/libicuuc, running sap system processes, upgrade tool <upgrade_directory>/log, finish delete operation, terms netweaver upgrade, netweaver 2004s sapjup, input output exception, parameters file '', upgrade phase delete_oslibs_content
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