| | 1 | = Perl Mapscript 3.5+ Debugging = |
| | 2 | |
| | 3 | == Submitted by Aaron D. Hunt <hunt@zedxinc.com> == |
| | 4 | {{{ |
| | 5 | $ENV{MS_ERRORFILE} = "/var/log/mapserver.log"; # map engine error log |
| | 6 | }}} |
| | 7 | near the top of the perl mapscript code... before |
| | 8 | you initialize your map object. |
| | 9 | This is an environment variable: MS_ERRORFILE |
| | 10 | for the shell, or execution instance which catches |
| | 11 | all of the errors/warning that occur within mapserver |
| | 12 | and sends them to the filespec defined. This one is |
| | 13 | the *most* useful log for debugging mapfile errors, |
| | 14 | index problems, and mapserver internals, etc. |
| | 15 | {{{ |
| | 16 | WEB |
| | 17 | log "/var/log/mapserver_access.log |
| | 18 | END |
| | 19 | }}} |
| | 20 | in the mapfile. you could probably setup that variable in |
| | 21 | mapscript as well, but I have always put it in the mapfile. |
| | 22 | It records a set of variables similar to the |
| | 23 | apache access log for each mapserver execution. |
| | 24 | |
| | 25 | == Submitted by Lowell.Filak <lfilak@medinaco.org> == |
| | 26 | {{{ |
| | 27 | #!/usr/bin/perl -w |
| | 28 | |
| | 29 | -w posts all Perl warnings to the httpd log file, |
| | 30 | usually named error_log in /var/log/httpd or /etc/httpd/logs. |
| | 31 | }}} |
| | 32 | == Submitted, in part, by Frank Warmerdam <warmerdam@pobox.com> == |
| | 33 | {{{ |
| | 34 | /sbin/ldconfig -v |
| | 35 | }}} |
| | 36 | will give information concerning the shared libraries present |
| | 37 | on your system. |
| | 38 | {{{ |
| | 39 | echo $LD_LIBRARY_PATH |
| | 40 | }}} |
| | 41 | Will give information on the library path traversed when |
| | 42 | linking. |
| | 43 | {{{ |
| | 44 | locate <library_name_ie._gd.h> |
| | 45 | }}} |
| | 46 | Will give location(s) of the specified filename. |
| | 47 | |
| | 48 | Does the above information show a mixture of include files |
| | 49 | (different revisions of the same library). |
| | 50 | |
| | 51 | == Submitted by Daniel Morissette <dmorissette@mapgears.com> == |
| | 52 | {{{ |
| | 53 | ldd mapserv |
| | 54 | }}} |
| | 55 | Look for the path that is listed. |
| | 56 | Then make sure this path is part of your runtime library path, |
| | 57 | for this you have two options, assuming you're running Linux: |
| | 58 | |
| | 59 | 1- add the path to /etc/ld.so.conf and run 'ldconfig' as root |
| | 60 | |
| | 61 | or |
| | 62 | |
| | 63 | 2- Use SetEnv LD_LIBRARY_PATH to specify this path in your |
| | 64 | apache httpd.conf |
| | 65 | |
| | 66 | If when running ./mapserv you receive the error message: |
| | 67 | {{{ |
| | 68 | mapserv:error while loading libraries:libproj.so.0 cannot open shared object file : No such file or directory. |
| | 69 | }}} |
| | 70 | Run '/sbin/ldconfig -v | grep libproj'. |
| | 71 | |
| | 72 | Which should return something similar to "libproj.so.0" |
| | 73 | If not try reinstalling proj.4 |
| | 74 | |
| | 75 | == Submitted by Daniel Morissette <dmorissette@mapgears.com> == |
| | 76 | |
| | 77 | If when running ./mapserv you recieve the error message: |
| | 78 | {{{ |
| | 79 | error while loading shared libraries :/usr/libwwwappp.so.0 undefined symbol: HTZlib_inflate |
| | 80 | }}} |
| | 81 | Check /usr/lib and /usr/local/lib for a copy of w3c-libwww. |
| | 82 | If both have a copy then remove the copy in /usr/lib. |
| | 83 | The cleanest way to remove, is to 'rpm -q -a | grep w3c-libwww' & do 'rpm -e w3c-libwww-<version_number>'. |
| | 84 | |
| | 85 | If you end up with a "core" file from an error and have the GNU debugger installed: |
| | 86 | {{{ |
| | 87 | gdb |
| | 88 | target core ./core |
| | 89 | backtrace |
| | 90 | }}} |
