[Mapserver-users] shp2Img Segmentation Fault error with ArcSDE layer (mapserv
Query )
Pryor, Clayton J
CJPRYOR at sandia.gov
Tue Oct 14 13:03:39 EDT 2003
Hi all,
Well, I'm making progress with building a version of the default demo app
using my layers in ArcSDE. However, I have run into another problem that I
can not seem to find the answer to.
It has been described in the archives before but the thread in the archives
took a different branch than mine. I have not been able to find out how to
resolve the branch that my problem has taken.
System Configuration:
---------------------
Machine: IBM ThinkPad A31
Operating System: Linux Red Hat 9
Web Server: Apache (httpd-2.0.47)
PHP: 4.3.3 configured for CGI
GD: 2.0.15
PROJ: 4.4.7
Mapserver: 4.0
ArcSDEClient: 8.3
Mapserver Configuration: ./configure --with-sde=/usr/local/arcsde/sdeexe83
--with-sde-version=83 --with-gd=/usr/local --with-php=/usr/local/php-4.3.3
--with-proj=/usr/local
Problem Description:
--------------------
When trying to do a query from my web page against a layer based on a shape
file that came with the demo app the query works fine. When trying to do a
query from my web page against a layer based on ArcSDE (Oracle) I get the
generic "Internal Server Error" message. I believe everything is properly
duplicated in my demo.map file and my html files so that the ArcSDE based
query is the same as the shapefile based query.
In reviewing the apache server logs I see the "Premature end of script
headers" message.
Command Line Results:
---------------------
When I enter the mapserv call from the command line I get html for a web
page followed by a line that reads: "Segmentation fault".
Here is the actual command that I enter in the "htdocs/demoSNL3" directory
(which contains my application):
../../cgi-bin/mapserv
QUERY_STRING="map=%2Fusr%2Flocal%2Fapache2%2Fhtdocs%2FdemoSNL3
%2Fdemo.map&layer=usboundaries&zoomsize=2&program=%2Fcgi-bin
%2Fmapserv&map_web_imagepath=%2Fusr%2Flocal%2Fapache
2%2Fhtdocs%2Ftmp%2F&map_web_imageurl=%2Ftmp%2F"
Here are the actual results that I get back:
Content-type: text/html
<!-- MapServer version 4.0 OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP SUPPORTS=PROJ
SUPPORTS=FREETYPE SUPPORTS=WMS_SERVER INPUT=TIFF INPUT=EPPL7 INPUT=JPEG
INPUT=SDE INPUT=SHAPEFILE -->
<html>
<head><title>MapServer SNL3 Demo Interface</title></head>
<body bgcolor=#FFFFFF>
<center><h1>MapServer SNL3 Demo Interface</h1></center>
<hr>
<form method=GET action="/cgi-bin/mapserv">
<center>
<table border=0 cellspacing=0 cellpadding=4 bgcolor="#000000">
<tr>
<td valign="top" align=center>
<table cellpadding="0" cellspacing="0" border="0">
<tr><td colspan="2"><INPUT NAME="img" TYPE="image"
SRC="/tmp/DEMO106614390932750.png" width=600 height=600 border=0></td></tr>
<tr>
<td> <font size=-1 face="arial,helvetica"
color="#FFFFFF"><b>Powered by MapServer</b></font></td>
<td align="right"><img src="/tmp/DEMOsb106614390932750.png"></td>
</tr>
</table>
</td>
<td valign="top" bgcolor=#ffffff>
<table cellpadding="5" cellspacing="0" border="0" bgcolor="#ffffff">
<tr><td>
<center><input type="submit" value="Refresh/Query"></center>
<p>
<input type="radio" name="mode" value="browse" checked> <b>Browse
map</b><br>
<input type="radio" name="mode" value="query"> <b>Query
feature</b><br>
<input type="radio" name="mode" value="nquery"> <b>Query multiple
features</b>
<hr>
<p>
<b>Select Layers to Display: </b><br>
<select multiple name="layer" size=3>
<option value="usboundaries" selected> US State Boundaries
<option value="generationplants" > EP Generation Plants
<option value="substations" > EP Substations
<option value="transmissionlines" > EP Transmission Lines
</select>
<p>
Zoom In <input type=radio name=zoomdir value=1 >
Pan <input type=radio name=zoomdir value=0 checked>
Zoom Out <input type=radio name=zoomdir value=-1 >
<p>
Zoom Size <input type=text name=zoomsize size=4 value=2>
<p>
<font size=+1><b>Legend</b></font><br><hr>
<img src="/tmp/DEMOleg106614390932750.png"><hr>
<p>
<center><INPUT NAME="ref" TYPE="image"
SRC="/tmp/DEMOref106614390932750.png" border="0"></center>
</td></tr></table>
</td></tr>
</table>
</center>
<input type="hidden" name="imgxy" value="299.5 299.5">
<input type="hidden" name="imgext" value="-4574351.873995 -4032950.294076
4517834.162229 5059850.315722">
<input type="hidden" name="map"
value="/usr/local/apache2/htdocs/demoSNL3/demo.map">
<input type="hidden" name="savequery" value="true">
<input type="hidden" name="program" value="/cgi-bin/mapserv">
<input type="hidden" name="map_web_imagepath"
value="/usr/local/apache2/htdocs/tmp/">
<input type="hidden" name="map_web_imageurl" value="/tmp/">
</form>
<p><hr><p>
</body></html>
Segmentation fault
Similar Post:
-------------
I found the following response to a similar post in the archives. This, in
fact, does generate the same problem in my environment. However, it is not
the problem in the archives so I could not find out what to do with this
problem!
--------begin post--------
Hi Matthew,
> However, if I pass any parameters at all, be they in mapserver, WMS
> or WFS format, I get an internal server error. The error log says
> only "premature end of script", and if I run mapserv at the command
> line by passing a QUERY_STRING here, I get "segmentation fault".
I had a similar problem and could find out what went wrong the shp2img
program, that was compiled with mapserver. Run it on a shell with your
mapfile (e.g. shp2img -m mapfile.map -o output.png) and see, if there
are any errors. If yes, I think, that the same errors will happen using
the mapserv CGI.
hth,
Bjoern.
---------end post---------
Follow-up Command Line Results:
-------------------------------
When I enter the suggested command on my own system in the subdirectory
containing shp2img I get the "Segmentation fault" error again. This is the
difference between my problem and the post referenced above.
Here is the actual command that I enter and the result:
./shp2img -m /usr/local/apache2/htdocs/demoSNL3/demo.map -o output.png
Segmentation fault
Help Requested:
---------------
Now that I have isolated the problem to shpimg, what is the next step in
resolving it?
Once again, your help is greatly appreciated!
Sincerely,
Clay
------------------------------------------------------------
Clayton J. Pryor phone (505) 845-3557
Sandia National Laboratories
Critical Infrastructure Surety fax (505) 844-9641
PO Box 5800 MS 0451
Albuquerque NM 87185-0451 email cjpryor at sandia.gov
------------------------------------------------------------
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