This is the error that I get on my web mapping app
Failed to load resource: the server responded with a status of 404 (Not Found)
http://gis.collincountytx.gov/electionpollingplace/
This is a web server that is hosting the app inside the DMZ requesting the ArcGIS Server (two of them behind a load balance F5) tiles from a different location/server inside the network
...and this is the ArcGIS Server that is hosting the maps
ArcGIS JavaScript API: basemapWM
Thank you
Gabi Voicu
There appears to be an issue with the map tile creation process. As soon as the map zooms to level 13 there are missing tiles. I would look into recreating the tiles with Manage Map Server Cache Tiles tool and use the RECREATE_EMPTY_TILES update mode.
Did you find a solution? I currently have the same problem if I use the web adaptor I have empty tiles, but if I don't use (directly to the 6080 port) everything works fine