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<p><font face="Tahoma">Dear all!</font></p>
<p><font face="Tahoma">We are running a Python application an a
linux distribution (RedHat) which creates clips in MBTILES
format from a WMS. We are using the Python-API and are basically
doing something like this:</font></p>
<p><font face="Courier New, Courier, monospace">src_ds = gdal.Warp(<br>
tmp_file,<br>
ds_in,<br>
format='GTiff',<br>
outputBounds=[bbox[0], bbox[2], bbox[1], bbox[3]],<br>
dstSRS=output_srs,<br>
)<br>
ds_out = gdal.Translate(<br>
out_filepath,<br>
src_ds,<br>
format='MBTILES',<br>
creationOptions=creation_options,<br>
)</font></p>
<p><font face="Tahoma">The application throughs an error from time
to time since a few days. We couldn't figure out a pattern yet
and therefore we are also not able to reproduce the error. The
error is the following:</font></p>
<p><font face="Tahoma"><font face="Courier New, Courier, monospace">Mon
Nov 15 13:48:13 2021: CPLError: GDALWMS: Unable to download
block 2765, 602.<br>
URL: TCP connection reset by peer<br>
HTTP status code: 0, error: TCP connection reset by peer.<br>
Add the HTTP status code to <ZeroBlockHttpCodes> to
ignore this error (see <a class="moz-txt-link-freetext" href="http://www.gdal.org/frmt_wms.html">http://www.gdal.org/frmt_wms.html</a>).<br>
Mon Nov 15 13:48:13 2021: CPLError: /wms_xml/wms_config.xml,
band 1: IReadBlock failed at X offset 2764, Y offset 601<br>
Mon Nov 15 13:48:13 2021: CPLError: GetBlockRef failed at X
block offset 2764, Y block offset 601</font><br>
</font></p>
<p><font face="Tahoma">The exact same data gets </font><font
face="Tahoma"><font face="Tahoma">processed successfully in one
run and not successfully in another run.</font> We didn't
change the code nor the Python or GDAL version. Hence, we are
kind of puzzled as the error comes and goes seemingly at random.</font>
<br>
</p>
<p><font face="Tahoma"><font face="Tahoma">Does anyone of you have
any hints?<br>
</font></font></p>
<p><font face="Tahoma"><font face="Tahoma">Thanks & best
regards!<br>
Roman<br>
</font></font></p>
<p>
</p>
<pre class="moz-signature" cols="72">_______________________________________________
Dipl.-Ing. Roman Breitfuss-Schiffer, MSc. (GIS)
</pre>
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