Solution : https://service.sap.com/sap/support/notes/857356 (SAP Service marketplace login required)
Key words : 
sapbwnews bw support package 14 netweaver'04 stack 14, 10 content            import support package 22, 0b            import support package 28, 50            import support package 14, 1 content support package 22, 0b support package 28, support package, sapbwnews bw3, 0b patch28, expect data
Related Notes : 
       
| 1107434 | OLAP cache consultation: Long wait times due to locks | 
| 959405 | Cache enqueues are not set | 
| 856226 | Logging mechanism to analyse Cache related problems | 
| 836439 | SAPBWNews BW Support Package 14 NW'04 Stack 14 RIN | 
| 807967 | Filling the cache from the Reporting Agent | 
| 783252 | SAPBWNews BW 3.1 Content Support Package 22 | 
| 783170 | SAPBWNews BW 3.0B Support Package 28 |