anchor.diff:  and the `start hadoop` section of https://github.com/apache/tinkerpop/blob/x.y.z/docker/scripts/build.sh.
   
   This recipe assumes that you installed the Gremlin Console with the
  -http://tinkerpop.apache.org/docs/x.y.z/reference/#spark-plugin[Spark plugin] (the
  -http://tinkerpop.apache.org/docs/x.y.z/reference/#hadoop-plugin[Hadoop plugin] is optional). Your Hadoop cluster
  +link:http://tinkerpop.apache.org/docs/x.y.z/reference/#spark-plugin[Spark plugin] (the
  +link:http://tinkerpop.apache.org/docs/x.y.z/reference/#hadoop-plugin[Hadoop plugin] is optional). Your Hadoop cluster
   may have been configured to use file compression, e.g. LZO compression. If so, you need to copy the relevant
   jar (e.g. `hadoop-lzo-*.jar`) to Gremlin Console's `ext/spark-gremlin/lib` folder.
   
  
positive.code: OLAP traversals with Spark on YARN
  ----------------------------------
  
  TinkerPop's combination of http://tinkerpop.apache.org/docs/x.y.z/reference/#sparkgraphcomputer[SparkGraphComputer]
  and http://tinkerpop.apache.org/docs/x.y.z/reference/#_properties_files[HadoopGraph] allows for running
  distributed, analytical graph queries (OLAP) on a computer cluster. The
  http://tinkerpop.apache.org/docs/x.y.z/reference/#sparkgraphcomputer[reference documentation] covers the cases
  where Spark runs locally or where the cluster is managed by a Spark server. However, many users can only run OLAP jobs
  via the http://hadoop.apache.org/[Hadoop 2.x] Resource Manager (YARN), which requires `SparkGraphComputer` to be
  configured differently. This recipe describes this configuration.
  
negative.code: hadoopConfDir = System.getenv('HADOOP_CONF_DIR')
  archive = 'spark-gremlin.zip'
  archivePath = "/tmp/$archive"
  ['bash', '-c', "rm -f $archivePath; cd ext/spark-gremlin/lib && zip $archivePath *.jar"].execute().waitFor()
  conf = new PropertiesConfiguration('conf/hadoop/hadoop-gryo.properties')
  conf.setProperty('spark.master', 'yarn-client')
  conf.setProperty('spark.yarn.dist.archives', "$archivePath")
  