[Chameleon] Error rendering map image

Wed May 2 10:36:36 EST 2012

Hello,

This problem usually happens when the PHP session is not being read 
correctly. On Ubuntu the session file are in /var/lib/php5/

Do you see any file in that directory?

It's probably a problem with the PHP session and not with Chameleon 
itself...

Julien

On 12-05-02 06:45 AM, Fernando Sánchez García wrote:
> Hi, I know this list is not very active, but I have to ask for help.
> Some years ago I developed a gis with apache + php + mapserver +
> postgresql + postgis + chameleon. I had two systems: one in Windows XP
> 32bit and the other with Ubuntu Server 9.10 32bit. I upgraded to
> v3.0.2 MS4W with (MapServer 5.6.6, PHP 5.3.6, Apache 2.2.17 with
> OpenSSL 0.9.8o) with Chameleon 2.6rc, PostgreSQL 9 and PostGIS 1.5 on
> windows and have installed on the server a Ubuntu Server 11.10 64bit
> with Mapserver 5.6.6, PHP 5.3.6-13, Apache 2.2.20, Chameleon 2.6rc,
> PostgreSQL 9 and PostGIS 1.5.
> In windows everything works fine without any error, but in linux all
> the gis works well except the generation of map images. Chameleon
> gives me the following error:
>
> "Error rendering map image:
> A fatal error has occurred restoring your session.
> Please restart the application ".
>
> This error does not always appear. Sometimes that happens when
> mapserver-chameleon loads the image and sometimes when I use the
> widget "LocateByAttribute" and other times with the widget
> "ClearQuery" that I once sent Dejan Gambin to clear the search
> LocateByAttribute.
>
> I located the file that launches "drawmap.php" the error message on line 1493:
>
> "imagestring ($ oImage, 3, $ x, $ y, "Error rendering map image", $
> nRed) and in line 372 ->  error_image ("A fatal error has occurred
> restoring your session. \ nPlease restart the application.")"
>
> possibly because it meets the conditional $ oMapSession->  omap == null
>
> I don't understand very well that happens and because it happens occasionally.
> I have tried several web browsers: IE, Firefox, Chrome, etc, and have
> even installed all the gis in Ubuntu 11.10 32-bit and error occurs.
>
> I installed the software "HttpWatch" (net monitoring) to see the
> operation and if I repeat for example the following sequence:
> 1. Press "LocateByAttribute"
> 2. Find an item.
> 3. Clear search with "ClearQuery".
> The error occurs and this is what HttWactch shows me:
>
> http://150.214.120.135/chameleon/common//wrapper/drawmap.php?map_session_mode=1&REQUEST=KEYMAP&sid=4fa0f7fc09c89 (image is displayed
> correctly)
>
> http://150.214.120.135/chameleon//widgets/LocateByAttribute/search.phtml?sid=4fa0f7fc09c89&usejavascript=true&searchall=true&pointzoombuffer=5&highlight=true (loaded
> correctly)
>
> http://150.214.120.135/chameleon/UpdateMap.php?sid=4fa0f7fc09c89&U=1335949954027223 (loaded correctly and on the Content show->  "<html><body onload="p=document.layers?parentLayer:window.parent;p.goCWCJSAPI.ResourceLoaded();;p.goCWCJSAPI.CheckCallStack()";><form>
> <br>
> <input type='hidden' name='NB_RESOURCE' value='0'/>
> </form></body></html>")
>
> http://150.214.120.135/chameleon/common//wrapper/drawmap.php?map_session_mode=1&run_query=0&sid=4fa0f7fc09c89&streaming=true&UniqId=1335949954377920
> (ERROR: "Error rendering map image:");
>
> Please can anyone help? Thanks.
>
>
>
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> Chameleon at lists.maptools.org
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-- 
Julien-Samuel Lacroix
Mapgears
http://www.mapgears.com/