[mapserver-dev] mapcache segv when starting service

[Stephen Woodbridge]

Some additional information:

I tried this on my old Debian Lenny system and got a complaint that it 
could not find libmapcache.so.0 which is getting installed in 
/usr/local/bin so I added to /etc/apache2/envvars

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib

and then got the segv that I was getting on Ubuntu. I added above to 
Ubuntu also but that did not change the behavior. Regardless, this might 
be something to mention in the INSTALL document.

I also rebuilt mapcache with --enable-debug but it dies before it prints 
anything into the log files.

-Steve

On 4/29/2012 9:18 PM, Stephen Woodbridge wrote:
> Hi Thomas,
>
> I just cloned mapcache trunk and compiled it on Ubuntu 11.10 and tried
> to configure it with the following mapcache xml and got a segv. Do any
> of the directories need to be created ahead of time? How can I run this
> in the debugger to get a backtrace? Nothing in the error.log file either.
>
> I pretty much followed the mapcache.xml and mapcache.xml.sample files to
> create my mapcache.xml below.
>
> Let me know if you want a ticket with all this in it.
>
> Thanks,
> -Steve
>
> swoodbridge at iMapTools-tiles:/u$ sudo chown -R www-data.www-data mapcache
> swoodbridge at iMapTools-tiles:/u$ ls -al /u/mapcache/
> total 12
> drwxrwxr-x 2 www-data www-data 4096 2012-04-30 00:54 .
> drwxr-xr-x 4 swoodbridge swoodbridge 4096 2012-04-29 13:49 ..
> -rw-rw-r-- 1 www-data www-data 2209 2012-04-30 00:54 mapcache.xml
>
> swoodbridge at iMapTools-tiles:/u$ cat /etc/apache2/mods-enabled/mapcache.conf
> <IfModule mapcache_module>
> <Directory /u/mapcache>
> Order Allow,Deny
> Allow from all
> </Directory>
> MapCacheAlias /mapcache "/u/mapcache/mapcache.xml"
> </IfModule>
>
>
> swoodbridge at iMapTools-tiles:/u$ sudo a2enmod mapcache
> Enabling module mapcache.
> To activate the new configuration, you need to run:
> service apache2 restart
> swoodbridge at iMapTools-tiles:/u$ sudo service apache2 restart
> Segmentation fault
> Action 'configtest' failed.
> The Apache error log may have more information.
> ...fail!
>
> swoodbridge at iMapTools-tiles:/u$ cat /u/mapcache/mapcache.xml
> <?xml version="1.0" encoding="UTF-8"?>
> <mapcache>
> <metadata>
> <title>iMaptools mapcache service</title>
> <abstract>Contains various services for Tiger 2011 maps</abstract>
> </metadata>
>
> <cache name="disk" type="disk">
> <base>/u/mapcache</base>
> <symlink_blank/>
> </cache>
>
> <source name="tiger2011" type="wms">
> <getmap>
> <params>
> <FORMAT>image/png</FORMAT>
> <MAP_IMAGETYPE>agg_qn</MAP_IMAGETYPE>
> <LAYERS>Tiger_2011</LAYERS>
> </params>
> </getmap>
>
> <http>
> <url>http://localhost/cgi-bin/mapserv</url>
> </http>
> </source>
>
> <source name="tiger2011-streets" type="wms">
> <getmap>
> <params>
> <FORMAT>image/png</FORMAT>
> <MAP_IMAGETYPE>agg_qn</MAP_IMAGETYPE>
> <LAYERS>streets</LAYERS>
> <TRANSPARENT>true</TRANSPARENT>
> </params>
> </getmap>
>
> <http>
> <url>http://localhost/cgi-bin/mapserv</url>
> </http>
> </source>
>
> <format name="PNGQ_FAST" type="PNG">
> <compression>fast</compression>
> <colors>256</colors>
> </format>
>
> <format name="PNG_BEST" type="PNG">
> <compression>best</compression>
> </format>
>
> <tileset name="tiger-base">
> <source>tiger2011</source>
> <cache>disk</cache>
> <grid>WGS84</grid>
> <grid>g</grid>
> <format>PNGQ_FAST</format>
> <metatile>5 5</metatile>
> <metabuffer>30</metabuffer>
> <expires>3600</expires>
> </tileset>
>
> <tileset name="tiger-streets">
> <source>tiger2011-streets</source>
> <cache>disk</cache>
> <grid>WGS84</grid>
> <grid>g</grid>
> <format>PNGQ_FAST</format>
> <metatile>5 5</metatile>
> <metabuffer>30</metabuffer>
> <expires>3600</expires>
> </tileset>
>
> <default_format>PNGQ_FAST</default_format>
>
> <service type="wms" enable="true">
> <full_wms>assemble</full_wms>
> <resample_mode>bilinear</resample_mode>
> <format>PNG</format>
> <maxsize>4096</maxsize>
> </service>
> <service type="wmts" enabled="true"/>
> <service type="tms" enabled="true"/>
> <service type="kml" enabled="true"/>
> <service type="gmaps" enabled="true"/>
> <service type="ve" enabled="true"/>
> <service type="demo" enabled="true"/>
>
> <errors>report</errors>
> <lock_dir>/tmp</lock_dir>
>
> </mapcache>
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