<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:10pt"><div><span>A bit more info on this. I tried using the Fiddler HTTP
debugging proxy to get a better idea of whether/when messages were
getting lost. I was not able to reproduce the problem while messages
were going through Fiddler. I don't know if this is because it made the
message processing less bursty, or what. When I turned Fiddler off I was
able to reproduce the problem again.<br></span></div><div><br></div>I am using the latest version of OpenLayers, version 2.11.<div><br></div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt;"><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"><font face="Arial" size="2"><hr size="1"><b><span style="font-weight:bold;">From:</span></b> Michael Katz <michaeladamkatz@yahoo.com><br><b><span style="font-weight: bold;">To:</span></b> "openlayers-users@lists.osgeo.org" <openlayers-users@lists.osgeo.org><br><b><span style="font-weight: bold;">Sent:</span></b> Friday, October 21, 2011 5:05 PM<br><b><span style="font-weight: bold;">Subject:</span></b> [OpenLayers-Users] OpenLayers apparently dropping tile requests when zooming quickly (?)<br></font><br>
<div id="yiv1872861502"><div><div style="color:#000;background-color:#fff;font-family:arial, helvetica, sans-serif;font-size:10pt;"><div><span>(Sorry, I seem to have mistakenly appended this question to another thread. Reposting hopefully as its own topic.)<br></span></div><div><span><br></span></div><div><span>I am serving 256x256-pixel <span class="yiv1872861502bold yiv1872861502highlight yiv1872861502search-highlight">tiles</span> (OpenLayers.Layer.XYZ) from my own local web server, which are overlayed on top of a Google base map.</span><br><br><span>If I repeatedly double-click on the openlayers map to <span class="yiv1872861502bold yiv1872861502highlight yiv1872861502search-highlight">zoom</span> repeatedly, it fires off a rapid stream of <span class="yiv1872861502bold yiv1872861502highlight yiv1872861502search-highlight">tile</span>
requests to the local web server. However, I find that if often fails
to fire the complete set of necessary requests for the final <span class="yiv1872861502bold yiv1872861502highlight yiv1872861502search-highlight">zoom</span> level. For instance, suppose I <span class="yiv1872861502bold yiv1872861502highlight yiv1872861502search-highlight">zoom</span>
quickly from level 3 to level 8 by double-clicking on the center of the
map five time. When I get to level 8, it might fill in only three of
the nine visible overlay <span class="yiv1872861502bold yiv1872861502highlight yiv1872861502search-highlight">tiles</span> in the view. As far as I can tell, the other six XYZ <span class="yiv1872861502bold yiv1872861502highlight yiv1872861502search-highlight">tile</span>
requests never were made by openlayers to the local web server. Is this
expected behavior? For instance, is there some point at which
openlayers stops issuing <span class="yiv1872861502bold yiv1872861502highlight yiv1872861502search-highlight">tile</span> requests if there are too many
requests outstanding?</span><br><br><span>(In my case it may take a few seconds to generate each <span class="yiv1872861502bold yiv1872861502highlight yiv1872861502search-highlight">tile</span>, so there is indeed a backlog of <span class="yiv1872861502bold yiv1872861502highlight yiv1872861502search-highlight">tile</span> requests for those <span class="yiv1872861502bold yiv1872861502highlight yiv1872861502search-highlight">zoom</span> levels I quickly passed through. The Google basemap <span class="yiv1872861502bold yiv1872861502highlight yiv1872861502search-highlight">tiles</span>, on the other hand, never seem to get lost, but I don't know if this is because they are served more quickly than my <span class="yiv1872861502bold yiv1872861502highlight yiv1872861502search-highlight">tiles</span>, or what.)</span></div><div><span><br></span></div></div></div></div><br>_______________________________________________<br>Users mailing list<br><a
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