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Marcelo Vanzin b8487713d3 [SPARK-2778] [yarn] Add yarn integration tests. 
This patch adds a couple of, currently, very simple integration tests
to make sure both client and cluster modes are working. The tests don't
do much yet other than run a simple job, but the plan is to enhance
them after we get the framework in.

The cluster tests are noisy, so redirect all log output to a file
like other tests do. Copying the conf around sucks but it's less
work than messing with maven/sbt and having to clean up other
projects.

Note the test is only added for yarn-stable. The code compiles
against yarn-alpha but there are two issues I ran into that I
could not overcome:
- an old netty dependency kept creeping into the classpath and
  causing akka to not work, when using sbt; the old netty was
  correctly suppressed under maven.
- MiniYARNCluster kept failing to execute containers because it
  did not create the NM's local dir itself; this is apparently
  a known behavior, but I'm not sure how to work around it.

None of those issues are present with the stable Yarn.

Also, these tests are a little slow to run. Apparently Spark doesn't
yet tag tests (so that these could be isolated in a "slow" batch),
so this is something to keep in mind.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #2257 from vanzin/yarn-tests and squashes the following commits:

6d5b84e [Marcelo Vanzin] Fix wrong system property being set.
8b0933d [Marcelo Vanzin] Merge branch 'master' into yarn-tests
5c2b56f [Marcelo Vanzin] Use custom log4j conf for Yarn containers.
ec73f17 [Marcelo Vanzin] More review feedback.
67f5b02 [Marcelo Vanzin] Review feedback.
f01517c [Marcelo Vanzin] Review feedback.
68fbbbf [Marcelo Vanzin] Use older constructor available in older Hadoop releases.
d07ef9a [Marcelo Vanzin] Merge branch 'master' into yarn-tests
add8416 [Marcelo Vanzin] [SPARK-2778] [yarn] Add yarn integration tests.
2014-09-24 23:10:26 -07:00
..
alpha [SPARK-3477] Clean up code in Yarn Client / ClientBase 2014-09-23 11:20:52 -05:00
common/src [SPARK-2778] [yarn] Add yarn integration tests. 2014-09-24 23:10:26 -07:00
stable [SPARK-2778] [yarn] Add yarn integration tests. 2014-09-24 23:10:26 -07:00
pom.xml [SPARK-2778] [yarn] Add yarn integration tests. 2014-09-24 23:10:26 -07:00
README.md fix docs for yarn 2014-01-03 14:14:35 +08:00

README.md

YARN DIRECTORY LAYOUT

Hadoop Yarn related codes are organized in separate directories to minimize duplicated code.

  • common : Common codes that do not depending on specific version of Hadoop.

  • alpha / stable : Codes that involve specific version of Hadoop YARN API.

alpha represents 0.23 and 2.0.x stable represents 2.2 and later, until the API changes again.

alpha / stable will build together with common dir into a single jar