Description
As reported by Chandler Burgess, testnb fails in sequential mode with exception:
Exception in thread "main" java.io.FileNotFoundException: /tmp/mahout-work-andy/20news-train-vectors (Is a directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:120)
at org.apache.hadoop.fs.RawLocalFileSystem$TrackingFileInputStream.<init>(RawLocalFileSystem.java:71)