From the command line can you run: hadoop fs -ls
And see SomeDir/transactions.csv? It looks like HDFS is not accessible from wherever you are running spark-itemsimilarity. Are you trying to run a local version of Spark because the default is "--master local” This can still access a clustered HDFS if you are configured to access it from your machine. On Mar 9, 2015, at 10:35 AM, Jeff Isenhart <jeffi...@yahoo.com.INVALID> wrote: bump...anybody??? On Wednesday, March 4, 2015 9:22 PM, Jeff Isenhart <jeffi...@yahoo.com.INVALID> wrote: I am having issue getting a simple itemsimilarity example to work. I know hadoop is up and functional (ran the example mapreduce program anyway) But when I run either of these ./mahout spark-itemsimilarity -i "SomeDir/transactions.csv" -o "hdfs://localhost:9000/users/someuser/output" -fc 1 -ic 2 ./mahout spark-itemsimilarity -i "SomeDir/transactions.csv" -o "SomeDir/output" -fc 1 -ic 2 and get Exception in thread "main" java.io.IOException: No FileSystem for scheme: hdfs at org.apache.hadoop.fs.FileSystem.getFileSystemClass(FileSystem.java:2421) at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2428) at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:88) at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2467) at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2449) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:367) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:166) at org.apache.mahout.common.HDFSPathSearch.<init>(HDFSPathSearch.scala:36) at org.apache.mahout.drivers.ItemSimilarityDriver$.readIndexedDatasets(ItemSimilarityDriver.scala:152) at org.apache.mahout.drivers.ItemSimilarityDriver$.process(ItemSimilarityDriver.scala:213) at org.apache.mahout.drivers.ItemSimilarityDriver$$anonfun$main$1.apply(ItemSimilarityDriver.scala:116) at org.apache.mahout.drivers.ItemSimilarityDriver$$anonfun$main$1.apply(ItemSimilarityDriver.scala:114) at scala.Option.map(Option.scala:145) at org.apache.mahout.drivers.ItemSimilarityDriver$.main(ItemSimilarityDriver.scala:114) at org.apache.mahout.drivers.ItemSimilarityDriver.main(ItemSimilarityDriver.scala) I am guessing there are some config settings I am missing Usingmahout 1.0 Snapshothadoop 2.6.0