Changes between Version 5 and Version 6 of DebuggingMapserver


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Timestamp:
Jan 27, 2009, 1:25:27 PM (15 years ago)
Author:
jmckenna
Comment:

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  • DebuggingMapserver

    v5 v6  
    22
    33   1. Use [http://www.mapserver.org/utilities/shp2img.html shp2img] from the commandline to test your map file if possible. It is often much easier to debug problems without the extra complications of the web environment.
    4    2. Turn on debugging. As of !MapServer 3.7 the MAP, LAYER and CLASS objects have a DEBUG keyword. If you include a DEBUG keyword in objects giving problems following by a greater than zero number, then various debugging output about the map, layer or class may be generated. The quality and quantity of debugging output varies widely. Note: Using MS4.0.1 I discovered that the correct syntax for DEBUG is simply DEBUG ON/OFF. Attempting to use DEBUG 5, etc. in a map file results in addtional bugs. Very confusing.
     4   2. Turn on debugging. As of !MapServer 5.0 the [http://www.mapserver.org/mapfile/map.html MAP], and [http://www.mapserver.org/mapfile/layer.html LAYER] objects have a DEBUG keyword. If you include a DEBUG keyword in objects giving problems following by a greater than zero number, then various debugging output about the map, layer or class may be generated.
    55   3. Some additional debugging can be turned on from GDAL and OGR by setting the CPL_DEBUG environment variable to on. Similarly additional PROJ.4 debug info can be produced by setting PROJ_DEBUG to ON.
    66   4. The MS_ERRORFILE environment variable can be set to a path (or "stdout" or "stderr") to have all errors handled within MapServer to a logfile or console. This can be helpful, especially for situations where the error is otherwise ignored, or doesn't get all the way back to the client.