[jira] [Comment Edited] (SPARK-1911) Warn users that jars should be built with Java 6 for PySpark to work on YARN

["Tathagata Das (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-1911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14008260#comment-14008260 ] 

Tathagata Das edited comment on SPARK-1911 at 5/25/14 1:43 AM:
---------------------------------------------------------------

https://github.com/apache/spark/pull/859/ adds a warning in make-distribution.sh if they try to compile spark with java 6.

Note that the actual problem of making Java 7 compiled JARs work with Python still needs to be solved.


was (Author: tdas):
https://github.com/apache/spark/pull/859/files

> Warn users that jars should be built with Java 6 for PySpark to work on YARN
> ----------------------------------------------------------------------------
>
>                 Key: SPARK-1911
>                 URL: https://issues.apache.org/jira/browse/SPARK-1911
>             Project: Spark
>          Issue Type: Sub-task
>          Components: Documentation
>            Reporter: Andrew Or
>             Fix For: 1.0.0
>
>
> Python sometimes fails to read jars created by Java 7. This is necessary for PySpark to work in YARN, and so Spark assembly JAR should compiled in Java 6 for PySpark to work on YARN.
> Currently we warn users only in make-distribution.sh, but most users build the jars directly. We should emphasize it in the docs especially for PySpark and YARN because this issue is not trivial to debug.



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