Solution : https://service.sap.com/sap/support/notes/1098046 (SAP Service marketplace login required)
Key words : 
sap e-recruiting -> technical settings ->  search engine sap e-recruiting -> technical settings -> periodic services sap e-recruiting -> recruitment -> talent warehouse -> candidate-> candidate search working, sap e-recruiting search functions 1, sap e-recruiting 3, e-recruiting-specific document attributes, e-recruiting search, e-recruiting documentation, longer require xml search profiles, e-recruiting 2, e-recruiting, technical reasons
Related Notes : 
       
| 1345777 | FAQs Search Engine Service (SES) | 
| 1301016 | BF HCM_ERC_CI_3 is active: Using the search with SES | 
| 1292143 | BF HCM_ERC_CI_2 active: Using the search with SES | 
| 1151863 | Filter val for chg pointer for SES is missing in OOHAP_BASIC | 
| 1111318 | Report: Update of document attributes in Knowledge Provider | 
| 1109408 | BAdI implementation HRHAP00_FOLLOW_UP_SE is inactive | 
| 1108186 | Corrections of relationship-based search in e-recruiting | 
| 1102598 | Enhancement of Delete method for consistent LOIO's | 
| 1094413 | Applications based on SAP NetWeaver 7.0 using TREX 7.1 | 
| 1094303 | SES:BUSOBJ_VALUE_ASSIST Exception if date = '00000000' | 
| 1090985 | Including query_part in Search_Objects | 
| 817145 | Composite SAP note/overview: TREX troubleshooting | 
| 815866 | Points during TREX installation relevant for E-Recruiting | 
| 568853 | Supported TREX versions in SAP E-Recruting |