On 5 Aug 2008, at 20:26, Jon Burgess wrote: > On Tue, 2008-08-05 at 12:04 -0700, Mikel Maron wrote: >> >>>> I've set up mod_tile and renderd. Compiled against mapnik 0.5.1. >>>> >>>> renderd works for a bit, but then segfaults. It seems to be a >> problem with fielding a burst concurrent requrests, but not certain. >>>> >>>> Any suggestions on problems to look for? >>> >>> What compile options did you use for compiling Mapnik? If you set >>> THREADING=single then that could be the problem. It might be worth >>> switching renderd to be single threaded by editing render_config.h >> to >>> NUM_THREADS to 1 and recompile. >> >> I didn't compile Mapnik with any THREADING option .. assume it >> defaults to multi? >> >> Changing NUM_THREADS to 1 and recompiling does prevent segfaults. >> Doesn't explain the problem though, and I'd like to get multiple >> threads working, if possible. >> >>> The code operates fine in multi-threaded mode on the main OSM server >>> which uses the latest SVN mapnik code. >>> >>> If you still run into problems then it would be good to recompile >>> renderd with debug info by adding -g to the CFLAGS/CXXFLAGS and get >> a >>> backtrace from gdb. >> >> Running renderd in gdb, it segfaults in "fribidi_remove_bidi_marks" > > Ah, multithreading with fribidi would be the problem. From what I > recall, the solution that Artem found was to switch to using libicu > instead :-). This change was made some time ago in SVN but has not > appeared in any release version. I'd recommend moving to the latest > SVN > code.
Mikel, Jon is right, fribidi is not thread safe. Using SVN trunk ( libicu ) will solve this problem. Artem > > > Jon > > > > _______________________________________________ > dev mailing list > dev@openstreetmap.org > http://lists.openstreetmap.org/listinfo/dev _______________________________________________ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
