Hi Andreas, I wrote a little example app [1] to show the error. It seems that the error is gone in OpenLayers v4.4.2. If you want to see how it behaved before have a look at my example, which uses OL v 4.3.4.
Cheers Chris [1] https://apps.meggsimum.de/ol-vt-issue/ On 19.10.2017 17:17, Andreas Hocevar wrote: > Hey Chris, > > this sounds like a bug. Can you please create a ticket and provide a > codepen that shows the issue? > > Thanks, > Andreas. > > On Thu, Oct 19, 2017 at 5:11 PM, Christian Mayer <ml...@meggsimum.de> wrote: >> Hi OL-Devs, >> >> I have a setup with a VectorTile layer based on Mapbox Vector Tiles (created >> with GeoServer / Geowebcache). To save time at transferring the pbf-files to >> the target environment all empty pbf-files were deleted. This results in >> HTTP 404s (of course) when OpenLayers tries to load the missing tiles. >> I expected that this won't bring any problems and that OL is just ignoring >> them. But unfortunately a JS-exception occurs if in the current map-exent is >> one of the missing tiles. >> It seems that the "tileProjection" is undefined for the given "sourceTile", >> so the operation tileProjection.getUnits() fails, see here [1]. So it seems >> that the missing tile is not ignored in the code and due to the lack of >> information the rendering process fails. >> If I add an emtpy pbf-file, so no HTTP 404 occurs anymore, the exception is >> gone. Even though no more information is provided (from my humble point of >> view). >> >> So here are some questions: Can someone confirm this behavior? Is this >> wanted behavior for some reasons? Or is this even a bug or an edge case? >> >> I am using OpenLayers v4.3.4. >> >> Thanks in advance for any hint / help / clarification. >> >> Cheers >> Chris >> >> [1] >> https://github.com/openlayers/openlayers/blob/v4.3.4/src/ol/renderer/canvas/vectortilelayer.js#L139 >> >> >> _______________________________________________ >> Dev mailing list >> d...@lists.osgeo.org >> https://lists.osgeo.org/mailman/listinfo/openlayers-dev
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