Solution : https://service.sap.com/sap/support/notes/958345 (SAP Service marketplace login required)
Key words : 
system administration -> system configuration-> knowledge management -> content management, content management -> repository managers-> filesystem repositories ->, heterogenous installation / enable filesystem repository, symptom knowledge management, knowledge management, global shared directory, path specifications depending, resolved differently depending, kmc nw04 sp 17, cluster node accesses
Related Notes : 
       
| 1067221 | Composite note for heterogeneous installation |