[mkgmap-dev] How to solve/debug weird problem

Sat Jan 22 14:28:24 GMT 2011

Hi Marko,

Marko Mäkelä <marko.makela at iki.fi> wrote:
> On Thu, Jan 20, 2011 at 10:25:27PM +0100, Johannes Formann wrote:
> >> --add-pois-to-areas --adjust-turn-headings --drive-on-right
> >> --check-roundabouts --remove-short-arcs=3.3 --net --route --gmapsupp
> >> --tdbfile --index M0001736.TYP
> >>
> >> You might try removing all of them first. If it does not crash, add
> >> --route (which should imply --net).
> >
> >Starting without those options
> >java -Xms256m -Xmx2560m -ea -jar mkgmap.jar --max-jobs=1 --latin1
> >--code-page=1252 -c /home/osm/build/template.args
> 
> It's great that it crashes even without --route. I think that you should
> put back the --remove-short-arcs=3.3, so that you will get rid of the
> 'zero length arc' warnings, maybe except the ones about splitting looped
> ways.
> 
> Now, what if you use a template.args where you remove all files after
> the problematic tile? Try to find out which tile it is. Your sample 
> output mentions two different tile files around the crash: 59420055 and
> 59420066. If you cannot modify the assertion message to display the file
> name, you can use 'binary search' on the template.args file, removing
> half the tiles until it no longer crashes.

Making some binary search with 
java -Xms256m -Xmx2560m -ea -Dlog.config=logging.properties -jar
mkgmap.jar --max-jobs=1 --latin1 --code-page=1252
--remove-short-arcs=3.3 -c /home/osm/build/template.args

47-94: crashes
70-94: won't
47-70: crashes
47-59: won't
59-70: crashes
59-64: won't
65-70: crashes
65-67: crashes
67: won't
66: crashes

Put it online: http://radkarte.formann.de/59420066.osm.gz

> By the way, which mkgmap version are you using?

"trunk"/Checked out revision 1792.

> Unrelated to this mkgmap bug (or insufficient diagnostics), is there a
> reason why you are still using the osm.bz2 input? The osm.pbf is more
> compact and can be split quicker.

I had once tried it, but the mainline splitter hadn't support for it yet
IIRC, after that forgotten to recheck, since it runs usually fully
automated once a week in the night.

greetings

Johannes