How to turn on DEBUG logging for the virtual module

Created by Steve Place, Modified on Wed, Jul 16 at 8:36 PM by Steve Place

If you open a support ticket related to virtual graphs, a Stardog support engineer may ask you to enable DEBUG logging for the virtual (also known as "vega") module. This will enable a greater level of logging and is useful for troubleshooting virtual graph issues. To enable it, add the following to your log4j2.xml file, which can be found in your home directory [1]:

<Logger name="com.complexible.stardog.virtual.vega" level="DEBUG" additivity="false">
    <AppenderRef ref="stardogAppender"/>
</Logger>

You'll need to restart your Stardog server for this to take effect. Note this will add a lot of logging to your stardog.log, so we highly recommend you turn off DEBUG logging (by removing this stanza and restarting) once you have finished troubleshooting the issue.

[1] If it's not in your home directory, you can find a template in <stardog-installation>/server/dbms and copy that to your home directory.