Configuring JAVA_HOME for DataStax agents 

DataStax agents do not pick up the environment variables of the currently logged in user by default.

DataStax agents do not pick up the environment variables of the currently logged in user by default. If Java is not in the machine's PATH, there are errors in the agent log on startup:

nohup: cannot run command 'java': No such file or directory

Procedure

On the Cassandra nodes where the agents are installed, create the file /etc/default/datastax-agent and set the environment variables for JAVA_HOME and any other custom environment variables that the agent might need. For example:
JAVA_HOME = /usr/lib/jvm/java-8-oracle