Hi,
I had some problems with legend mode when I was worked with fastCGI
some months ago. I had to stop this job for a time, but I can retake it
again now.
I'm testing the last CGI MapServer version. When i want use the legend
template option MapServer crashes in some cases (and isn't fastCGI).
I atach a test case to reproduce (mapfile, legend template and url)
this problem.
The MapServer version:
/usr/local/apache/cgi-bin/mapserv -v
MapServer version 4.10.0-rc1 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG
OUTPUT=WBMP OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=FREETYPE
SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER
SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER INPUT=EPPL7 INPUT=POSTGIS
INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE
Valgrind results:
valgrind /usr/local/apache/cgi-bin/mapserv
QUERY_STRING='map=/usr/local/apache/htdocs/mapserver/maps/prueba.map&mode=legend&layers=a+b&mapext=458350+4613016+704030+4858696&mapsize=350+350&map_legend_template=../templates/legend_pruebas.html'
==3299== Memcheck, a memory error detector for x86-linux.
==3299== Copyright (C) 2002-2003, and GNU GPL'd, by Julian Seward.
==3299== Using valgrind-2.1.0, a program supervision framework for
x86-linux.
==3299== Copyright (C) 2000-2003, and GNU GPL'd, by Julian Seward.
==3299== Estimated CPU clock rate is 1922 MHz
==3299== For more details, rerun with: -v
==3299==
==3299== Invalid free() / delete / delete[]
==3299== at 0x4002B455: free (vg_replace_malloc.c:186)
==3299== by 0x40BBBCBB: (within /lib/i686/libc-2.3.3.so)
==3299== by 0x40BBB951: __libc_freeres (in /lib/i686/libc-2.3.3.so)
==3299== by 0x4016AACC: vgPlain___libc_freeres_wrapper
(vg_intercept.c:172)
==3299== Address 0x410AA570 is not stack'd, malloc'd or free'd
==3299==
==3299== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
==3299== malloc/free: in use at exit: 19708 bytes in 16 blocks.
==3299== malloc/free: 1746 allocs, 1731 frees, 1759492 bytes allocated.
==3299== For a detailed leak analysis, rerun with: --leak-check=yes
==3299== For counts of detected errors, rerun with: -v
Thanks,
Miguel
Mguel Coladas escribió:
I have tried using valgrind --num-callers=20,
but don't tell much anyway.
I'm testing if the crash is caused by a special layer, or by a special
set of layers.
It seems that when I put more than seven layers visibles in the legend
mapserver crash. If i put maxscale and minscale works, but the layers
are not visible.
When i can, i package a test case to send you.
Thanks
Daniel Morissette escribió:
Um.. it seems that Valgrind is finding
something but we can't tell much from this Valgrind output. Perhaps try
using 'valgrind --num-callers=20' to get a more complete call stack in
the Valgrind output (note that since the error is reported inside
valgrind's libc_freeres_wrapper that probably won't tell us much
anyway, but we can try).
Would it be possible for you to package a test case (mapfile, data,
html templates, etc.) to send us to reproduce this issue? Since this is
happening when generating in mode=legend, we may be able get away with
a test case with just the mapfile and templates (without the data) but
I'm not sure.
Daniel
miguel coladas wrote:
Thanks for your answer Daniel.
I'm testing with latest 4.10 beta and I'm having some problems
[EMAIL PROTECTED] miguel]$ /usr/local/apache/fcgi-bin/mapserv -v
MapServer version 4.10.0-beta1 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG
OUTPUT=WBMP OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=FREETYPE
SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER
SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER SUPPORTS=FASTCGI INPUT=EPPL7
INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE
With this version of mapserver I have run Valgrind at the command line
as you tell me:
[EMAIL PROTECTED] miguel]$ valgrind
/usr/local/apache/fcgi-bin/mapserv
QUERY_STRING="map=/usr/local/apache/htdocs/mapserver/map/client-draw.map&mode=legend&layers=provincias&mapext=458350+4613016+704030+4858696&mapsize=350+350&map_legend_template=../templates/legend.html"
==5322== Memcheck, a memory error detector for x86-linux.
==5322== Copyright (C) 2002-2003, and GNU GPL'd, by Julian Seward.
==5322== Using valgrind-2.1.0, a program supervision framework for
x86-linux.
==5322== Copyright (C) 2000-2003, and GNU GPL'd, by Julian Seward.
==5322== Estimated CPU clock rate is 1923 MHz
==5322== For more details, rerun with: -v
==5322==
==5322== Invalid free() / delete / delete[]
==5322== at 0x4002B455: free (vg_replace_malloc.c:186)
==5322== by 0x40BC4CBB: (within /lib/i686/libc-2.3.3.so)
==5322== by 0x40BC4951: __libc_freeres (in /lib/i686/libc-2.3.3.so)
==5322== by 0x4016AACC: vgPlain___libc_freeres_wrapper
(vg_intercept.c:172)
==5322== Address 0x410897F8 is not stack'd, malloc'd or free'd
==5322==
==5322== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
==5322== malloc/free: in use at exit: 58517 bytes in 129 blocks.
==5322== malloc/free: 14327 allocs, 14199 frees, 4390277 bytes
allocated.
==5322== For a detailed leak analysis, rerun with: --leak-check=yes
==5322== For counts of detected errors, rerun with: -v
any idea?
Daniel Morissette escribió:
If you are on Linux then you could
perhaps capture the URL of the request that causes the crash, and then
run it under Valgrind (http://valgrind.org/) at the command
line using something like:
valgrind ./mapserv QUERY_STRING="map=....."
You get the value of QUERY_STRING from the URL that causes the crash.
If Valgrind reports errors then I suggest you create a bug report with
the Valgrind output and a test case to reproduce (including mapfile,
test dataset, etc. and the query_string that causes the crash).
BTW, I would suggest that you test this against the latest 4.10 beta
before reporting a bug.
Daniel
miguel coladas wrote:
Hi everyone,
first i'm spanish, so sorry for my english.
I'm using mapserver (4.8.3) in fast CGI mode (apache 2.0.59,
mod_fastcgi/2.4.2). I'm having some problems with this configuration
when i want use the legend template option.
In the legend template file, when I put "[leg_layer_html opt_flag=1]"
the legend works correctly. However, when I put "[leg_layer_html
opt_flag=2]" mapserver crashes. In CGI mode, the same legend works
correctly. Other modes (map, query... works correctly too).
The error_log of apache server:
[Mon Aug 21 18:16:43 2006] [error] [client 192.168.1.3] Premature end
of script headers: mapserv
I think this is a bug with mapserver in fast CGI mode. Can anyone help
me out with this?
Many thanks,
Miguel Coladas
test.tgz