GraphHopper .jar only log Errors, Bad Requests, etc

Question

I'm using GrpahHopper's self hosted routing server v0.5, running on Ubuntu 15.10.

The solution is run via a terminal with a jar file and arbitrary OSM data.

Is there a way to control the logged output of the server (e.g. to only show exceptions, bad requests, etc.)?

Answer 1

For that you'll have to repackage GraphHopper as there is no 'outside' configuration option provided - raise an issue if you need this.

Change the log4j.xml file under web/src/main/resources e.g. replace the root and com.graphhopper logger via the following snippet:

<logger name="com.graphhopper" additivity="false">
    <level value="warn" />
    <appender-ref ref="ASYNC" />
</logger>
<root>
    <priority value="warn"></priority>
    <appender-ref ref="ASYNC"/>
</root>

Then repackage GH via the quickstart from source.

Update it might be possible without repackaging via

export JAVA_OPTS="-Dlog4j.debug -Dlog4j.configuration=some-log-config.xml"

using the mentioned and updated log4j.xml but I've not tested this yet. See the log4j docs