Class names are case-sensitive in Java, so try $HADOOP_HOME/bin/hadoop jar $HADOOP_HOME/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.9.1.jar Grep input output 'dfs[a-z.]+'
>Воскресенье, 14 октября 2018, 18:04 +03:00 от Or Raz <r...@post.bgu.ac.il>: > >I am using Hadoop 2.9.1 standalone (the folder I am using is after successful >compilation of the source code) and whenever I run a Hadoop command such as >(where$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
