[jira] [Commented] (REEF-1665) Better default value for Java binary path

["Sergiy Matusevych (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/REEF-1665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15649015#comment-15649015 ] 

Sergiy Matusevych commented on REEF-1665:
-----------------------------------------

*UPDATE:* A better solution seems to be using
{code:java}
private static final String DEFAULT_JAVA_PATH = "{{JAVA_HOME}}/bin/java";
{code}
and let Hadoop expand it on the remote side, and implement the same expansion in REEF Local runtime.


> Better default value for Java binary path
> -----------------------------------------
>
>                 Key: REEF-1665
>                 URL: https://issues.apache.org/jira/browse/REEF-1665
>             Project: REEF
>          Issue Type: Bug
>          Components: REEF Client, REEF Driver
>            Reporter: Sergiy Matusevych
>            Assignee: Sergiy Matusevych
>            Priority: Minor
>              Labels: environment, java, path, runtime
>
> {{JavaLaunchCommandBuilder}} sets the default path to the Java executable  in this way:
> {code:java}
> private static final String DEFAULT_JAVA_PATH = System.getenv("JAVA_HOME") + "/bin/" + "java";
> {code}
> 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
> {code:java}
> DEFAULT_JAVA_PATH = "java";
> {code}
> and assume that java binary is in the system's {{PATH}} - both on the client and in the cluster.



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