[mkgmap-dev] Error in generation gmapsupp map (overflow?)

Mon Dec 20 12:49:22 GMT 2010

В сообщении от 20 декабря 2010 14:45:17 автор Steve Ratcliffe написал:
> Hello!
> 
> > I generate every week map from osm data in single file and elevation
> > contour from 133 .osm files. Osm data increase in each time, elevation
> > data in osm files is permanent. Yesterday i have error in generation
> > gmapsupp map:
> > 
> > --cut--
> > Exception in thread "main" java.lang.IllegalArgumentException
> > 
> >          at java.nio.ByteBuffer.allocate(Unknown Source)
> >          at uk.me.parabola.imgfmt.sys.Directory.sync(Directory.java:176)
> 
> Thanks for the report, it is a problem I've never seen before.
> 
> The failure is happening while creating a gmapsupp file.
> Could you tell me the size of the gmapsupp.img the last time it
> worked? Is it anywhere near 2G in size?

No, it just 60 MB in gmapsupp.img

> 
> The mkgmap code will not, I think, produce a gmapsupp larger than 2G,
> and, although this could be fixed I'm not sure that GPS devices
> would be able to deal with it anyway - or not all of them, I don't
> believe mine can even take an SD card larger than 2G.
> 
> If you are not actually using the gmapsupp.img then removing the
> option will fix the crash.
> 
> ..Steve

I split osm data file 124M to 2 files 80M and 45M and have no error. If i use 
one datafile of 124M (+1.7G files elev) i have error, but generate 
gmapsupp.img only from 1 this datafile file works fine.

Total size of all *.osm files (data and elev) 1,7G (1749576 byte). This 
produce gmapsupp.img file 60 MB.

I see, that mkgmap (java process) obtains 1,9G resident memory in process.