I'm running this index job via the command line using the jars as described here: http://druid.io/docs/latest/ingestion/command-line-hadoop-indexer.html Have determined Druid 0.12.0 has something weird going on in conjunction with the druid-parquet-extensions as the fs.defaultFs set in the conf/druid/_common/common.runtime.properties is seemingly not respected at some point (don't exactly have a ton of time to trace through their open source project). So here is what I have done as a successful workaround, hopefully this will be helpful java -Xmx512m -Ddruid.storage.storageDirectory=hdfs://{my_namenode_ip}:{my_namename_port}/{my_segments_path} -Ddruid.storage.type=hdfs -Dfile.encoding=UTF-8 -classpath extensions/druid-parquet-extensions/*:extensions/druid-avro-extensions:extensions/druid-hdfs-storage:lib/*:conf/druid/_common:{HADOOP_PATH}{HADOOP_JAR} io.druid.cli.Main index hadoop {DRUID_INDEXER_DATA} ... View more