Patch introduces the new way of working also retaining the existing ways of doing things.

For example build instruction for yarn in maven is
`mvn -Pyarn -PHadoop2.2 clean package -DskipTests`
in sbt it can become
`MAVEN_PROFILES="yarn, hadoop-2.2" sbt/sbt clean assembly`
Also supports
`sbt/sbt -Pyarn -Phadoop-2.2 -Dhadoop.version=2.2.0 clean assembly`

Author: Prashant Sharma <prashant.s@imaginea.com>
Author: Patrick Wendell <pwendell@gmail.com>

Closes #772 from ScrapCodes/sbt-maven and squashes the following commits:

a8ac951 [Prashant Sharma] Updated sbt version.
62b09bb [Prashant Sharma] Improvements.
fa6221d [Prashant Sharma] Excluding sql from mima
4b8875e [Prashant Sharma] Sbt assembly no longer builds tools by default.
72651ca [Prashant Sharma] Addresses code reivew comments.
acab73d [Prashant Sharma] Revert "Small fix to run-examples script."
ac4312c [Prashant Sharma] Revert "minor fix"
6af91ac [Prashant Sharma] Ported oldDeps back. + fixes issues with prev commit.
65cf06c [Prashant Sharma] Servelet API jars mess up with the other servlet jars on the class path.
446768e [Prashant Sharma] minor fix
89b9777 [Prashant Sharma] Merge conflicts
d0a02f2 [Prashant Sharma] Bumped up pom versions, Since the build now depends on pom it is better updated there. + general cleanups.
dccc8ac [Prashant Sharma] updated mima to check against 1.0
a49c61b [Prashant Sharma] Fix for tools jar
a2f5ae1 [Prashant Sharma] Fixes a bug in dependencies.
cf88758 [Prashant Sharma] cleanup
9439ea3 [Prashant Sharma] Small fix to run-examples script.
96cea1f [Prashant Sharma] SPARK-1776 Have Spark's SBT build read dependencies from Maven.
36efa62 [Patrick Wendell] Set project name in pom files and added eclipse/intellij plugins.
4973dbd [Patrick Wendell] Example build using pom reader.

Author: Takuya UESHIN <ueshin@happy-camper.st>

Closes #974 from ueshin/issues/SPARK-2029 and squashes the following commits:

e19e8f4 [Takuya UESHIN] Bump version number to 1.1.0-SNAPSHOT.

Author: witgo <witgo@qq.com>

Closes #786 from witgo/maven_plugin and squashes the following commits:

5de86a2 [witgo] Merge branch 'master' of https://github.com/apache/spark into maven_plugin
c35ef73 [witgo] Improve maven plugin configuration

We use org.apache.hadoop.yarn.server.webproxy.amfilter.AmIpFilter in spark on yarn but are not included it in the assembly jar.

I tested this on yarn cluster by removing the yarn jars from the classpath and spark runs fine now.

Author: Thomas Graves <tgraves@apache.org>

Closes #406 from tgravescs/SPARK-1474 and squashes the following commits:

1548bf9 [Thomas Graves] SPARK-1474: Spark on yarn assembly doesn't include org.apache.hadoop.yarn.server.webproxy.amfilter.AmIpFilter

This is a part of [PR 590](https://github.com/apache/spark/pull/590)

Author: witgo <witgo@qq.com>

Closes #626 from witgo/yarn_version and squashes the following commits:

c390631 [witgo] restore  the yarn dependency declarations
f8a4ad8 [witgo] revert remove the dependency of avro in yarn-alpha
2df6cf5 [witgo] review commit
a1d876a [witgo] review commit
20e7e3e [witgo] review commit
c76763b [witgo] The default value of yarn.version is equal to hadoop.version

1, Fix SPARK-1441: compile spark core error with hadoop 0.23.x
2, Fix SPARK-1491: maven hadoop-provided profile fails to build
3, Fix org.scala-lang: * ,org.apache.avro:* inconsistent versions dependency
4, A modified on the sql/catalyst/pom.xml,sql/hive/pom.xml,sql/core/pom.xml (Four spaces formatted into two spaces)

Author: witgo <witgo@qq.com>

Closes #480 from witgo/format_pom and squashes the following commits:

03f652f [witgo] review commit
b452680 [witgo] Merge branch 'master' of https://github.com/apache/spark into format_pom
bee920d [witgo] revert fix SPARK-1629: Spark Core missing commons-lang dependence
7382a07 [witgo] Merge branch 'master' of https://github.com/apache/spark into format_pom
6902c91 [witgo] fix SPARK-1629: Spark Core missing commons-lang dependence
0da4bc3 [witgo] merge master
d1718ed [witgo] Merge branch 'master' of https://github.com/apache/spark into format_pom
e345919 [witgo] add avro dependency to yarn-alpha
77fad08 [witgo] Merge branch 'master' of https://github.com/apache/spark into format_pom
62d0862 [witgo] Fix org.scala-lang: * inconsistent versions dependency
1a162d7 [witgo] Merge branch 'master' of https://github.com/apache/spark into format_pom
934f24d [witgo] review commit
cf46edc [witgo] exclude jruby
06e7328 [witgo] Merge branch 'SparkBuild' into format_pom
99464d2 [witgo] fix maven hadoop-provided profile fails to build
0c6c1fc [witgo] Fix compile spark core error with hadoop 0.23.x
6851bec [witgo] Maintain consistent SparkBuild.scala, pom.xml

container-log4j.properties is a file that YARN provides so that containers can have log4j.properties distinct from that of the NodeManagers.

Logs now go to syslog, and stderr and stdout just have the process's standard err and standard out.

I tested this on pseudo-distributed clusters for both yarn (Hadoop 2.2) and yarn-alpha (Hadoop 0.23.7)/

Author: Sandy Ryza <sandy@cloudera.com>

Closes #148 from sryza/sandy-spark-1252 and squashes the following commits:

c0043b8 [Sandy Ryza] Put log4j.properties file under common
55823da [Sandy Ryza] Add license headers to new files
10934b8 [Sandy Ryza] Add log4j-spark-container.properties and support SPARK_LOG4J_CONF
e74450b [Sandy Ryza] SPARK-1252. On YARN, use container-log4j.properties for executors

This lets us explicitly include Avro based on a profile for 0.23.X
builds. It makes me sad how convoluted it is to express this logic
in Maven. @tgraves and @sryza curious if this works for you.

I'm also considering just reverting to how it was before. The only
real problem was that Spark advertised a dependency on Avro
even though it only really depends transitively on Avro through
other deps.

Author: Patrick Wendell <pwendell@gmail.com>

Closes #49 from pwendell/avro-build-fix and squashes the following commits:

8d6ee92 [Patrick Wendell] SPARK-1121: Add avro to yarn-alpha profile

This removes some loose ends not caught by the other (incubating -> tlp) patches. @markhamstra this updates the version as you mentioned earlier.

Author: Patrick Wendell <pwendell@gmail.com>

Closes #51 from pwendell/tlp and squashes the following commits:

d553b1b [Patrick Wendell] Remove remaining references to incubation

(Ported from https://github.com/apache/incubator-spark/pull/637 )

Author: Sean Owen <sowen@cloudera.com>

Closes #31 from srowen/SPARK-1084.1 and squashes the following commits:

6c4a32c [Sean Owen] Suppress warnings about legitimate unchecked array creations, or change code to avoid it
f35b833 [Sean Owen] Fix two misc javadoc problems
254e8ef [Sean Owen] Fix one new style error introduced in scaladoc warning commit
5b2fce2 [Sean Owen] Fix scaladoc invocation warning, and enable javac warnings properly, with plugin config updates
007762b [Sean Owen] Remove dead scaladoc links
b8ff8cb [Sean Owen] Replace deprecated Ant <tasks> with <target>

Version number to 1.0.0-SNAPSHOT

Since 0.9.0-incubating is done and out the door, we shouldn't be building 0.9.0-incubating-SNAPSHOT anymore.

@pwendell

Author: Mark Hamstra <markhamstra@gmail.com>

== Merge branch commits ==

commit 1b00a8a7c1a7f251b4bb3774b84b9e64758eaa71
Author: Mark Hamstra <markhamstra@gmail.com>
Date:   Wed Feb 5 09:30:32 2014 -0800

    Version number to 1.0.0-SNAPSHOT

Incorporated Patrick's feedback comment on #211 and made maven build/dep-resolution atleast a bit faster.

Allow spark on yarn to be run from HDFS. Allows the spark.jar, app.jar, and log4j.properties to be put into hdfs.

This uses a seperate Hadoop version for YARN artifact. This means when people link against
spark-yarn, things will resolve correctly.

Also rename parent project to spark-parent (otherwise it shows up as
"parent" in IntelliJ, which is very confusing).

See the discussion at https://github.com/mesos/spark/pull/355 for why
default profile activation is a problem.