[osmosis-dev] possible concurrency issue when using --apply-change

[Brett Henderson]

On 11 September 2012 22:11, Andrew Harvey <andrew.harvey4 at gmail.com> wrote:

> Hi,
>
> I'm using Osmosis to apply an .osc osm change file to an existing .osm
> file to produce a new .osm file with the changes from the .osc with:
>
> osmosis --read-xml-change file="change.osc.gz" --sort-change
> --simplify-change --read-xml file="base.osm.gz" --sort --apply-change
> --write-xml file="patched.osm.gz"
>
> However I find that sometimes this works and sometimes it fails. When I
> say sometimes I mean if I run the same command line on the same source
> files multiple tiles maybe 20% of the time it will crash with messages
> like that attached. That really threw me off so my only thought is it is
> a concurrency issue at play.
>
> I will keep trying to find the problem but any hints or thoughts would
> help.
>
> Thank you.
>

This appears to have happened before:
http://lists.openstreetmap.org/pipermail/osmosis-dev/2011-January/000891.html

Unfortunately I have no idea what causes it.  I've never seen it myself.

Brett
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