[ https://issues.apache.org/jira/browse/SPARK-1911?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andrew Or reopened SPARK-1911: ------------------------------ Looks like we still haven't fixed this. At the very least we should explicitly add this warning in the documentation. The next step that is more involved is to add a warning prompt in the mvn build scripts whenever Java 7+ is detected. > Warn users that jars should be built with Java 6 for YARN > --------------------------------------------------------- > > Key: SPARK-1911 > URL: https://issues.apache.org/jira/browse/SPARK-1911 > Project: Spark > Issue Type: Sub-task > Components: Documentation > Affects Versions: 1.1.0 > Reporter: Andrew Or > Fix For: 1.1.0 > > > 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. -- This message was sent by Atlassian JIRA (v6.2#6252)