<div dir="ltr"><div>If you know the querystring that generated the failure you could run even more verbose logging on the command line. Something like:</div><div><br></div><blockquote style="margin:0 0 0 40px;border:none;padding:0px"><div>env CPL_DEBUG=ON CPL_TIMESTAMP=ON MS_DEBUGLEVEL=5 MS_ERRORFILE=/dev/stderr mapserv QUERY_STRING='SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&FORMAT=image/png&WIDTH=256&HEIGHT=256&....'</div></blockquote><div><br></div><div>and maybe you could copy the image locally and try something like</div><div><br></div><blockquote style="margin:0 0 0 40px;border:none;padding:0px"><div>gdal_translate -tr 256 256 -projwin ulx uly lrx lry in.tif out.tif</div></blockquote><div><br></div><div>to glean more information. It's possible the input image (or an overview within the image) is corrupted in some way. If it turns out an overview is corrupted, you could try regenerating it with gdaladdo?</div><div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Oct 20, 2023 at 10:53 AM Raghav Singh via gdal-dev <<a href="mailto:gdal-dev@lists.osgeo.org">gdal-dev@lists.osgeo.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg8096540253324438060">
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I ran mapserver locally ran the specific wms request locally so getting this error - Assertion failed: (MS_RENDERER_RAWDATA(image->format) || (MS_RENDERER_PLUGIN(image->format) && rb)), function msDrawRasterLayerGDAL, file mapdrawgdal.c, line 126.</div>
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Abort trap: 6</div>
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Any idea regarding this?</div>
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and in logs it's coming like this -
<p style="margin:0px;font:11px Menlo"><span style="font-variant-ligatures:no-common-ligatures">Fri Oct 20 21:56:56 2023].137990 msDrawMap(): rendering using outputformat named mypng (AGG/PNG).</span></p>
<p style="margin:0px;font:11px Menlo"><span style="font-variant-ligatures:no-common-ligatures">[Fri Oct 20 21:56:56 2023].138020 msDrawMap(): WMS/WFS set-up and query, 0.000s</span></p>
<p style="margin:0px;font:11px Menlo"><span style="font-variant-ligatures:no-common-ligatures">[Fri Oct 20 21:56:56 2023].198332 msDrawRasterLayerLow(PICT-INHEND19-psQwiZ1L4t): entering.</span></p>
<p style="margin:0px;font:11px Menlo"><span style="font-variant-ligatures:no-common-ligatures">[Fri Oct 20 21:56:58 2023].803667 msDrawRasterLayerLow(PICT-INHEND19-psQwiZ1L4t): entering.</span></p>
<p style="margin:0px;font:11px Menlo"><span style="font-variant-ligatures:no-common-ligatures">[Fri Oct 20 22:10:13 2023].219765 drawGDAL() error coming from here: Unable to access file. GDALDatasetRasterIO() failed: IReadBlock
failed at X offset 497, Y offset 740: GDALWMS: Unable to download block 497, 740.</span></p>
<p style="margin:0px;font:11px Menlo"><span style="font-variant-ligatures:no-common-ligatures"><br>
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<div id="m_8096540253324438060divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Raghav Singh<br>
<b>Sent:</b> 04 October 2023 11:09<br>
<b>To:</b> <a href="mailto:gdal-dev@lists.osgeo.org" target="_blank">gdal-dev@lists.osgeo.org</a> <<a href="mailto:gdal-dev@lists.osgeo.org" target="_blank">gdal-dev@lists.osgeo.org</a>><br>
<b>Subject:</b> WMS layer issue at higher zoom level</font>
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Hi,</div>
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I am trying to get a layer from wms and at higher zoom levels I am getting this error - <span style="font-family:ui-monospace,"Cascadia Mono","Segoe UI Mono","Liberation Mono",Menlo,Monaco,Consolas,monospace;font-size:13px;text-align:left;color:rgb(35,38,41);background-color:rgb(227,230,232);display:inline">msDrawMap():
Image handling error. Failed to draw layer named 'PICT-INHEND19-psQwiZ1L4t'. drawGDAL(): Unable to access file. GDALDatasetRasterIO() failed: /tmp/mapfilePassthru-v2-temp-HxmyxI, band 1: IReadBlock failed at X offset 1064, Y offset 1551.</span></div>
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So, for this I checked from the imageservice side the mapfile is being created correctly and it is also present there and the mapfile contains a gserve request for getting the tiles - that is also working fine. So getting this error from mapserver only and
tried to put debug level 5 and other things also in the mapfile but couldn't get any other error, only this is coming. So need help in this if anybody knows what exactly is this and i can i debug mapserver locally if i want to then i can figure out the exact
point where the error is coming from. </div>
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Thanks,</div>
<div style="font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Raghav Singh</div>
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</div></blockquote></div><br clear="all"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature">Pete</div></div>