Github user ottobackwards commented on the issue:
https://github.com/apache/metron/pull/772
As a note :
```bash
-> % mvn exec:java \
-Dexec.mainClass="org.apache.metron.stellar.common.shell.StellarShell"
-Dexec.args="-l src/test/resources/log4j.properties"
```
Is how to run this with mv:exec from the stellar-common directory.
I also changed the log4j.properties to DEBUG from error.---
