Could not find or load main class com.sun.tools.javac.Main

[djy0215]

when running my own mapreduce job, I met that problem. And I have changed the hadoop-env.sh from jdk7 to jdk8
export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64

Below is the error message:
root@hadoop-master:~/src# hadoop com.sun.tools.javac.Main *.java
Error: Could not find or load main class com.sun.tools.javac.Main

[agicquel]

Execute export HADOOP_CLASSPATH=/usr/lib/jvm/java-7-openjdk-amd64/lib/tools.jar
add this command in your .bashrc if want to keep this env var

[valmikkalathia]

Thank you @agicquel . I was able to fix the problem by setting up the HADOOP_CLASSPATH environment variable.