Some folks have run into an issue when previewing tile layers in the manage tile layers page of MapViewer in obiee 188.8.131.52 (i.e. in the mapviewer deployed on wls in obiee).
If you get a 500 - internal server error when trying to view map/manage tiles from the Manage Tile Layers page then you have to apply the workaround/fix described in the mapviewer 184.108.40.206 readme
Known issues =============================================
- On certain WLS domains (mostly when ADF run-time library is deployed), you
may see errors when trying to preview tile layers. To fix this issue, modify
the weblogic.xml descriptor file found in mapviewer.ear's WEB-INF/ folder, and
uncomment the entry for the jstl 1.2 library as shown below (note the jsf
section should remain commented-out):