[gdal-dev] WMTS request error
Michał Kowalczuk
michkowalczuk at gmail.com
Tue Sep 3 02:08:19 PDT 2024
Dear GDAL colleagues,
Does GDAL has any http request failure detection, and mechanism for dealing
with it different than raising CPL Error.
Look at the following GDAL log. (Problem explanation after the log)
----------------------------------------------------------------------------------------------------
*[Tue Sep 3 10:54:47 2024].7930, 1227.3430: HTTP: Requesting [1/10]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=1
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=1>[Tue
Sep 3 10:54:47 2024].7930, 1227.3430: HTTP: Requesting [2/10]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=2
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=2>[Tue
Sep 3 10:54:49 2024].3630, 1228.9130: HTTP: Requesting [3/10]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=3
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=3>[Tue
Sep 3 10:54:50 2024].3630, 1229.9130: HTTP: Requesting [4/10]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=4
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=4>[Tue
Sep 3 10:54:50 2024].9300, 1230.4800: HTTP: Requesting [5/10]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=5
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=5>[Tue
Sep 3 10:54:52 2024].5640, 1232.1140: HTTP: Requesting [6/10]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=6
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=6>[Tue
Sep 3 10:54:52 2024].7680, 1232.3180: HTTP: Requesting [7/10]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=7
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=7>[Tue
Sep 3 10:54:53 2024].1190, 1232.6690: HTTP: Requesting [8/10]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=8
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=8>[Tue
Sep 3 10:54:53 2024].6050, 1233.1550: HTTP: Requesting [9/10]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=9
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=9>[Tue
Sep 3 10:54:53 2024].9630, 1233.5130: HTTP: Requesting [10/10]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=10
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=10>[Tue
Sep 3 10:54:54 2024].3000, 1233.8500: HTTP: Request [0]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=1
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=1>
: status = 0, type = (null), error = (null)[Tue Sep 3 10:54:54 2024].3000,
1233.8500: HTTP: Request [1]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=2
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=2>
: status = 200, type = image/jpeg, error = (null)[Tue Sep 3 10:54:54
2024].3000, 1233.8500: HTTP: Request [2]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=3
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=3>
: status = 200, type = image/jpeg, error = (null)[Tue Sep 3 10:54:54
2024].3000, 1233.8500: HTTP: Request [3]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=4
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=4>
: status = 200, type = image/jpeg, error = (null)[Tue Sep 3 10:54:54
2024].3000, 1233.8500: HTTP: Request [4]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=5
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=5>
: status = 200, type = image/jpeg, error = (null)[Tue Sep 3 10:54:54
2024].3000, 1233.8500: HTTP: Request [5]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=6
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=6>
: status = 200, type = image/jpeg, error = (null)[Tue Sep 3 10:54:54
2024].3000, 1233.8500: HTTP: Request [6]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=7
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=7>
: status = 200, type = image/jpeg, error = (null)[Tue Sep 3 10:54:54
2024].3000, 1233.8500: HTTP: Request [7]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=8
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=8>
: status = 200, type = image/jpeg, error = (null)[Tue Sep 3 10:54:54
2024].3000, 1233.8500: HTTP: Request [8]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=9
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=9>
: status = 200, type = image/jpeg, error = (null)[Tue Sep 3 10:54:54
2024].3000, 1233.8500: HTTP: Request [9]
https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=10
<https://mapy.geoportal.gov.pl/wss/service/PZGIK/ORTO/WMTS/StandardResolution?service=WMTS&request=GetTile&version=1.0.0&layer=ORTOFOTOMAPA&style=default&format=image/jpeg&TileMatrixSet=EPSG:4326&TileMatrix=EPSG:4326:5&TileRow=4&TileCol=10>
: status = 200, type = image/jpeg, error = (null)[Tue Sep 3 10:54:54
2024].3030, 1233.8530: WMS: ReadBlockFromCache[Tue Sep 3 10:54:54
2024].3040, 1233.8540: CPLError:
C:\Users\Michal\.cache\gdalwmscache\d03651177815877cffe0faf894690352/0/6/069e88521499910bd8763ede3e0cc2c4:
No such file or directoryERROR 4:
C:\Users\Michal\.cache\gdalwmscache\d03651177815877cffe0faf894690352/0/6/069e88521499910bd8763ede3e0cc2c4:
No such file or directory[Tue Sep 3 10:54:54 2024].3040, 1233.8540:
CPLError: GDALWMS: Unable to open downloaded block.ERROR 1: GDALWMS: Unable
to open downloaded block.[Tue Sep 3 10:54:54 2024].3040, 1233.8540: WMS:
After ReadBlockFromCache[Tue Sep 3 10:54:54 2024].3040, 1233.8540:
CPLError: GDALWMS: Unable to download block 1, 4.URL: HTTP status code:
0, error: (null).Add the HTTP status code to <ZeroBlockHttpCodes> to ignore
this error (see http://www.gdal.org/frmt_wms.html
<http://www.gdal.org/frmt_wms.html>).ERROR 1: GDALWMS: Unable to download
block 1, 4.URL: HTTP status code: 0, error: (null).Add the HTTP status
code to <ZeroBlockHttpCodes> to ignore this error (see
http://www.gdal.org/frmt_wms.html <http://www.gdal.org/frmt_wms.html>).[Tue
Sep 3 10:54:54 2024].3050, 1233.8550: CPLError: GDAL_WMS>, band 3:
IReadBlock failed at X offset 1, Y offset 4: GDALWMS: Unable to download
block 1, 4.URL: HTTP status code: 0, error: (null).Add the HTTP status
code to <ZeroBlockHttpCodes> to ignore this error (see
http://www.gdal.org/frmt_wms.html
<http://www.gdal.org/frmt_wms.html>).ERROR 1: GDAL_WMS>, band 3: IReadBlock
failed at X offset 1, Y offset 4: GDALWMS: Unable to download block 1,
4.URL: HTTP status code: 0, error: (null).Add the HTTP status code to
<ZeroBlockHttpCodes> to ignore this error (see
http://www.gdal.org/frmt_wms.html <http://www.gdal.org/frmt_wms.html>).*
----------------------------------------------------------------------------------------------------
I use GDALRasterIO from C API and as we can see GDAL makes 10 requests. One
of these request (*bolded*) ends with error, which generates the "Unable to
open downloaded block." error later.
Is there any method to force a *re-request* in such situations?
This server error occurs randomly and temporarily, and the next attempt
completes without problem.
Regards,
Michał
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