My colleagues and I have been investigating what (by looking at both the OL and Tilecache lists) seems to be a fairly common problem, namely WMS images that fail to load, seemingly at random. For example, see the thread:
http://www.nabble.com/TileCache-Random-Pink-Tiles-td14105104.html from December last year, among others. We have an Intranet application based on Geoserver, with OL 2.5 as the client and Tilecache 2.0.1 for caching WMS images. One particular user was getting broken images ("pink tiles") often in Firefox 2.0.0.12 on Win XP, particularly in evidence at high zoom levels. This was the case however high I cranked the value of IMAGE_RELOAD_ATTEMPTS in OL - it was failing still with this value at 10. It appeared as if it might be network-related at first, but this was eliminated by other users trying the app on the same Windows XP PC and it worked fine in the same version of Firefox. We eventually tracked it down to this particular user's Firefox profile. The app worked fine if he created a brand new profile, and put back all the plugins and extensions he had one by one. So it looks like it was caused by a corrupt profile, or some kind of "relic" setting from a previous version which was still influencing browser behaviour adversely. The articles: http://support.mozilla.com/kb/Managing+profiles http://kb.mozillazine.org/Issues_related_to_plugins http://kb.mozillazine.org/Problematic_extensions http://kb.mozillazine.org/Standard_diagnostic_-_Firefox were all excellent and helped us a great deal. It didn't appear to be any one particular extension alone which caused the problem. So, I offer this as something to try for anyone who has a broken tile problem that happens for users but isn't reproducible in their own environment. I'm sure it's just one possible cause among many, but worth a go? David Herbert British Antarctic Suvey. -- This message (and any attachments) is for the recipient only. NERC is subject to the Freedom of Information Act 2000 and the contents of this email and any reply you make may be disclosed by NERC unless it is exempt from release under the Act. Any material supplied to NERC may be stored in an electronic records management system. _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
