77620be76e
Adds hive2-metastore delegation token to conf when running in secure mode. Without this change, running on YARN in cluster mode fails with a GSS exception. This is a rough patch that adds a dependency to spark/yarn on hive-exec. I'm looking for suggestions on how to make this patch better. This contribution is my original work and that I licenses the work to the Apache Spark project under the project's open source licenses. Author: Doug Balog <doug.balogtarget.com> Author: Doug Balog <doug.balog@target.com> Closes #5031 from dougb/SPARK-6207 and squashes the following commits: 3e9ac16 [Doug Balog] [SPARK-6207] Fixes minor code spacing issues. e260765 [Doug Balog] [SPARK-6207] Second pass at adding Hive delegation token to conf. - Use reflection instead of adding dependency on hive. - Tested on Hive 0.13 and Hadoop 2.4.1 1ab1729 [Doug Balog] Merge branch 'master' of git://github.com/apache/spark into SPARK-6207 bf356d2 [Doug Balog] [SPARK-6207] [YARN] [SQL] Adds delegation tokens for metastore to conf. Adds hive2-metastore delagations token to conf when running in securemode. Without this change, runing on YARN in cluster mode fails with a GSS exception. |
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core | ||
data/mllib | ||
dev | ||
docker | ||
docs | ||
ec2 | ||
examples | ||
external | ||
extras | ||
graphx | ||
launcher | ||
mllib | ||
network | ||
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sql | ||
streaming | ||
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CONTRIBUTING.md | ||
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README.md | ||
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tox.ini |
Apache Spark
Spark is a fast and general cluster computing system for Big Data. It provides high-level APIs in Scala, Java, and Python, and an optimized engine that supports general computation graphs for data analysis. It also supports a rich set of higher-level tools including Spark SQL for SQL and structured data processing, MLlib for machine learning, GraphX for graph processing, and Spark Streaming for stream processing.
Online Documentation
You can find the latest Spark documentation, including a programming guide, on the project web page and project wiki. This README file only contains basic setup instructions.
Building Spark
Spark is built using Apache Maven. To build Spark and its example programs, run:
mvn -DskipTests clean package
(You do not need to do this if you downloaded a pre-built package.) More detailed documentation is available from the project site, at "Building Spark".
Interactive Scala Shell
The easiest way to start using Spark is through the Scala shell:
./bin/spark-shell
Try the following command, which should return 1000:
scala> sc.parallelize(1 to 1000).count()
Interactive Python Shell
Alternatively, if you prefer Python, you can use the Python shell:
./bin/pyspark
And run the following command, which should also return 1000:
>>> sc.parallelize(range(1000)).count()
Example Programs
Spark also comes with several sample programs in the examples
directory.
To run one of them, use ./bin/run-example <class> [params]
. For example:
./bin/run-example SparkPi
will run the Pi example locally.
You can set the MASTER environment variable when running examples to submit
examples to a cluster. This can be a mesos:// or spark:// URL,
"yarn-cluster" or "yarn-client" to run on YARN, and "local" to run
locally with one thread, or "local[N]" to run locally with N threads. You
can also use an abbreviated class name if the class is in the examples
package. For instance:
MASTER=spark://host:7077 ./bin/run-example SparkPi
Many of the example programs print usage help if no params are given.
Running Tests
Testing first requires building Spark. Once Spark is built, tests can be run using:
./dev/run-tests
Please see the guidance on how to run all automated tests.
A Note About Hadoop Versions
Spark uses the Hadoop core library to talk to HDFS and other Hadoop-supported storage systems. Because the protocols have changed in different versions of Hadoop, you must build Spark against the same version that your cluster runs.
Please refer to the build documentation at "Specifying the Hadoop Version" for detailed guidance on building for a particular distribution of Hadoop, including building for particular Hive and Hive Thriftserver distributions. See also "Third Party Hadoop Distributions" for guidance on building a Spark application that works with a particular distribution.
Configuration
Please refer to the Configuration guide in the online documentation for an overview on how to configure Spark.