This is the third-party library RRD4J that isn't available in the central maven repository.
'de.huxhorn.lilith:de.huxhorn.lilith.3rdparty.rrd4j:2.0.5'
<dependency>
<groupId>de.huxhorn.lilith</groupId>
<artifactId>de.huxhorn.lilith.3rdparty.rrd4j</artifactId>
<version>2.0.5</version>
</dependency>
<dependency org="de.huxhorn.lilith" name="de.huxhorn.lilith.3rdparty.rrd4j" rev="2.0.5"/>
"de.huxhorn.lilith", "de.huxhorn.lilith.3rdparty.rrd4j", "2.0.5"