[REEF-1665] Better default value for Java binary path

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.16
• Component/s: REEF Client, REEF Driver
• Labels: environment java path runtime
• Assignee: Sergiy Matusevych
• Reporter: Sergiy Matusevych
• Created: 08/Nov/16 01:53
• Updated: 10/Nov/16 22:34
• Resolved: 10/Nov/16 22:34

Description

JavaLaunchCommandBuilder sets the default path to the Java executable in this way:

private static final String DEFAULT_JAVA_PATH = System.getenv("JAVA_HOME") + "/bin/" + "java";

That is, by default REEF client assumes that
1) you have JAVA_HOME environment variable set, and
2) your JAVA_HOME is the same as the one on the remote host.

A better solution would be to set

DEFAULT_JAVA_PATH = "java";

and assume that java binary is in the system's PATH - both on the client and in the cluster.