I am using Hadoop 2.9.1 standalone (the folder I am using is after successful compilation of the source code) and whenever I run a Hadoop command such as (where$HADOOP_HOME= /usr/local/hadoop, the directory of Hadoop)
$HADOOP_HOME/bin/hadoop jar $HADOOP_HOME/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.9.1.jar grep input output 'dfs[a-z.]+' I get this error : Error: Could not find or load main class org.apache.hadoop.util.RunJar At first, I was thinking that I am missing some environment variables but are they necessary for the standalone case? Why did I get this error? (I even replaced with another example, I believe it is a classpath problem) hadoop2@master:/usr/local/hadoop-2.9.1$ bin/hadoop classpath /usr/local/hadoop-2.9.1/etc/hadoop:/usr/local/hadoop-2.9.1/share/hadoop/common/lib/*:/usr/local/hadoop-2.9.1/share/hadoop/common/*:/usr/local/hadoop-2.9.1/share/hadoop/hdfs:/usp/hdfs/*:/usr/local/hadoop-2.9.1/share/hadoop/yarn/lib/*:/usr/local/hadoop-2.9.1/share/hadoop/yarn/*:/usr/local/hadoop-2.9.1/share/hadoop/mapreduce/lib/*:/usr/local/hadoop-2.9.jar
