Hadoop is the distributed computing framework of Apache; hadoop-core contains the filesystem, job tracker and map/reduce modules
'com.facebook.hadoop:hadoop-core:0.20.0'
<dependency>
<groupId>com.facebook.hadoop</groupId>
<artifactId>hadoop-core</artifactId>
<version>0.20.0</version>
</dependency>
<dependency org="com.facebook.hadoop" name="hadoop-core" rev="0.20.0"/>
"com.facebook.hadoop", "hadoop-core", "0.20.0"