[mkgmap-dev] Mkgmap appears to hang on some split files

Mon Sep 28 12:18:00 BST 2009

Thanks for having a look at it Steve. Stackdumps are attached. OS = 
Ubuntu linux 9.04 64bit. LANG variable = en_US.UTF-8. Java version = 
1.6.0_0, OpenJDK RE 6b14-1.4.1- at ubuntu11, OpenJDK 64bit server VM 
14.0-b88 mixed-mode.

I've tried r1067 from the commandline which fails to render the tiles 
(out of memory) but exits 'normally' with a result code (which is what I 
want). Then I tried version 1022 and 1028 from the commandline and both 
finished quickly as well. So I'm starting to think it might have 
something to do with the way PHP passthru() executes these commands 
(I've written a PHP script that recursively splits and renders tiles 
until all areas are rendered). But a quick Google search did not bring 
up anything.

Steve Ratcliffe wrote:
> Hi Lambertus
> 
> On 28/09/09 08:36, Lambertus wrote:
>> While trying to get a new world map update out the door I noticed that
>> Mkgmap sometimes hangs on an OSM data file produced with Splitter. When
>> this happens the CPU is at 100% constantly for hours (e.g. all night)
>> until I kill the process. The problem occurs in r1222 and also r1228.
> 
> I ran the command line you gave with 1222 and 1228 on both the files
> and it completed in about a minute.  So no hang for me, and I'm going
> to have to ask a few questions to have any idea.
> 
> Is there any version where it works without hanging for you?
> What OS was it running on?
> What is the LANG variable set to (if running on Linux)?
> 
> Could you send a stack dump when it is stuck, since it completes after
> 1 minute for me, probably waiting five minutes is more than enough to
> know that it is stuck.
> 
> You can get a stack trace using typing ctrl-\
> or using kill -QUIT on linux and on windows ctrl-break is supposed to
> work but I wouldn't know.  Another way that works the same everywhere
> is to use jstack.  Use jps to get the process id of the running
> processes and call jstack with that id. jstack and jps come with JDK
> download of java from sun and probably other places too.
> 
> Thanks
> 
> ..Steve
> _______________________________________________
> mkgmap-dev mailing list
> mkgmap-dev at lists.mkgmap.org.uk
> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev

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