GitHub user srowen opened a pull request:
https://github.com/apache/spark/pull/926
SPARK-1974. Most examples fail at startup because spark.master is not set
Most example code has a few lines like:
```
val sparkConf = new SparkConf().setAppName("Foo")
val sc = new SparkContext(sparkConf)
```
The `SparkContext` constructor throws a `SparkException` if `spark.master`
is not set though, so this fails immediately.
This changes all examples to call `new SparkContext("local[2]", "Foo")` or
similar. `local[2]` because it's necessary for streaming examples and because
it's otherwise used as the default over `local[1]` in Spark.
(Since this started off when debugging the Kafka streaming code, I also
included some refinements there to the logging and resource management. Lightly
related.)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/srowen/spark SPARK-1974
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/926.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #926
----
commit fc852b7937adc87788004711e5295f8542da7b14
Author: Sean Owen <so...@cloudera.com>
Date: 2014-05-30T21:36:24Z
Add required Spark master parameter to StreamingContext creation in
examples, where SparkConf object before only set app name
commit 75d4d0d1eb6686a42d887460d416b3225c19ae0d
Author: Sean Owen <so...@cloudera.com>
Date: 2014-05-30T21:44:52Z
Close resources and log more errors in Kafka consumer stream
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