I set up HDP 2.4 Sandbox on Virtualbox on my windows machine. The pi program works. So, I guess the installation was OK. Then, I tried to compile a java program from wiki (http://wiki.apache.org/hadoop/HadoopDFSReadWrite.java), but it did not work. The following shows the compile command and error messages. Basically it does not recognize the org.apache.hadoop.conf package. javac -cp 'hadoop classpath' HadoopDFSFileReadWrite.java HadoopDFSFileReadWrite.java:22: error: package org.apache.hadoop.conf does not exist import org.apache.hadoop.conf.Configuration; ^ HadoopDFSFileReadWrite.java:23: error: package org.apache.hadoop.fs does not exist import org.apache.hadoop.fs.FileSystem; ^ ... Is this package recognized by HortowonWorks sandbox distribution? Many thanks. ... View more