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We are using MapProxy to cache/seed the maps from GeoServer. Halfway through the seeding process of a layer there is an error:

[17:17:14] 0 0.00% -41170.00000, 306838.00000, 279995.00000, 629467.00000 (0 tiles) [17:17:25] 5 6.25% 30284.94505, 592657.78022, 101739.89011, 629467.00000 (1088 tiles) [17:17:35] 4 12.50% 101739.89011, 592657.78022, 244649.78022, 629467.00000 (2240 tiles) [17:17:46] 5 18.75% 173194.83516, 592657.78022, 244649.78022, 629467.00000 (3328 tiles) [17:18:07] 3 25.00% 244649.78022, 592657.78022, 279995.00000, 629467.00000 (4544 tiles) [17:18:19] 3 50.00% -41170.00000, 306838.00000, 244649.78022, 592657.78022 (5248 tiles) [17:18:35] 5 51.56% 30284.94505, 521202.83516, 101739.89011, 592657.78022 (6592 tiles) [17:18:51] 5 53.12% -41170.00000, 449747.89011, 30284.94505, 521202.83516 (7936 tiles) [17:19:07] 5 54.69% 30284.94505, 449747.89011, 101739.89011, 521202.83516 (9280 tiles) [17:20:04] 4 56.25% 101739.89011, 449747.89011, 244649.78022, 592657.78022 (10688 tiles) [17:21:30] 5 57.81% 173194.83516, 521202.83516, 244649.78022, 592657.78022 (12032 tiles) [17:23:07] 5 59.38% 101739.89011, 449747.89011, 173194.83516, 521202.83516 (13376 tiles) [17:26:15] 5 60.94% 173194.83516, 449747.89011, 244649.78022, 521202.83516 (14720 tiles) [17:29:22] 4 62.50% -41170.00000, 306838.00000, 101739.89011, 449747.89011 (16128 tiles) [2019-05-23 17:30:56,165] mapproxy.source.wms - WARNING - could not retrieve WMS map: Internal HTTP error "http://localhost:8080/geoserver/spin/wms?styles=&format=image%2Fpng&height=2248&bbox=94761.8681318,442769.868132,251627.802198,599635.802198&transparent=True&layers=WegvakkenDetour&service=WMS&width=2248&request=GetMap&srs=EPSG%3A28992&version=1.1.1": timeout('timed out',) An error occured. Retry in 2 seconds: SourceError('Internal HTTP error "http://localhost:8080/geoserver/spin/wms?styles=&format=image%2Fpng&height=2248&bbox=94761.8681318,442769.868132,251627.802198,599635.802198&transparent=True&layers=WegvakkenDetour&service=WMS&width=2248&request=GetMap&srs=EPSG%3A28992&version=1.1.1": timeout(\'timed out\',)',). Retries left: 100

Works when the map is directly retrieved via a browser by using the following link:

"http://localhost:8080/geoserver/spin/wms?styles=&format=image%2Fpng&height=2248&bbox=94761.8681318,442769.868132,251627.802198,599635.802198&transparent=True&layers=WegvakkenDetour&service=WMS&width=2248&request=GetMap&srs=EPSG%3A28992&version=1.1.1"

There are no errors in the logs of GeoServer or MapProxy

I tried increasing the JVM heap space for tomcat in which GeoServer is deployed.

I tried increasing the rendering time and memory on the WMS page in GeoServer dashboard.

Our MapProxy+GeoServer setup works perfectly fine with 20 other layers but for this one layer it gives this error. How can I figure this out?

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Increasing the MapProxy Timeout value via globals.http.client_timeout parameter helped me solve this issue.

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