In OBIEE 22.214.171.124 (with MapViewer 126.96.36.199 deployed in Weblogic) you may see an 500 - internal server error when previewing map tile layers in the MapViewer manage map tile layers admin page.
If so you need to modify the web.xml as described in the readme.
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):
If you upgraded obiee from a previous 11.1.1.x release you may see this error anytime you access the mapviewer admin pages. The fix is to redeploy mapviewer.