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[SPARK-1753] Warn about PySpark on YARN on Red Hat #682

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[SPARK-1753] Warn about PySpark on YARN on Red Hat #682

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Warn about PySpark on YARN on Red Hat
andrewor14 May 7, 2014
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Merge branch 'master' of github.com:apache/spark into pyspark-on-yarn…
andrewor14 May 8, 2014
21c2492
Add JIRA reference + a note about requiring maven
andrewor14 May 8, 2014
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5 changes: 4 additions & 1 deletion docs/building-with-maven.md
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Expand Up @@ -98,7 +98,6 @@ The ScalaTest plugin also supports running only a specific test suite as follows

$ mvn -Dhadoop.version=... -Dsuites=org.apache.spark.repl.ReplSuite test


## Continuous Compilation ##

We use the scala-maven-plugin which supports incremental and continuous compilation. E.g.
Expand Down Expand Up @@ -129,6 +128,10 @@ Java 8 tests are run when -Pjava8-tests profile is enabled, they will run in spi
For these tests to run your system must have a JDK 8 installation.
If you have JDK 8 installed but it is not the system default, you can set JAVA_HOME to point to JDK 8 before running the tests.

## Building for PySpark on YARN ##
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@pwendell pwendell May 7, 2014

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It would be good to create a JIRA number for this and then reference it in the documentation.


PySpark on YARN is only supported if the jar is built with maven. Further, there is a known problem with building this assembly jar on Red Hat based operating systems (see SPARK-1753). If you wish to run PySpark on a YARN cluster with Red Hat installed, we recommend that you build the jar elsewhere, then ship it over to the cluster. We are investigating the exact cause for this.

## Packaging without Hadoop dependencies for deployment on YARN ##

The assembly jar produced by "mvn package" will, by default, include all of Spark's dependencies, including Hadoop and some of its ecosystem projects. On YARN deployments, this causes multiple versions of these to appear on executor classpaths: the version packaged in the Spark assembly and the version on each node, included with yarn.application.classpath. The "hadoop-provided" profile builds the assembly without including Hadoop-ecosystem projects, like ZooKeeper and Hadoop itself.
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