Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #5002 from vanzin/mkdist-hotfix and squashes the following commits:

ced65f7 [Marcelo Vanzin] [build] [hotfix] Fix make-distribution.sh for Scala 2.11.

Miss `toDF()` function in docs/sql-programming-guide.md

Author: zzcclp <xm_zzc@sina.com>

Closes #4977 from zzcclp/SPARK-6275 and squashes the following commits:

9a96c7b [zzcclp] Miss toDF()

The link to "Specifying the Hadoop Version" currently points to http://spark.apache.org/docs/latest/building-with-maven.html#specifying-the-hadoop-version.

The correct link is: http://spark.apache.org/docs/latest/building-spark.html#specifying-the-hadoop-version

Author: Theodore Vasiloudis <tvas@sics.se>

Closes #4999 from thvasilo/patch-1 and squashes the following commits:

c34aea8 [Theodore Vasiloudis] Fix dead link in Readme

The issue is discussed in https://issues.apache.org/jira/browse/SPARK-5669. Replacing all JBLAS usage by netlib-java gives us a simpler dependency tree and less license issues to worry about. I didn't touch the test scope in this PR. The user guide is not modified to avoid merge conflicts with branch-1.3. srowen ankurdave pwendell

Author: Xiangrui Meng <meng@databricks.com>

Closes #4699 from mengxr/SPARK-5814 and squashes the following commits:

48635c6 [Xiangrui Meng] move netlib-java version to parent pom
ca21c74 [Xiangrui Meng] remove jblas from ml-guide
5f7767a [Xiangrui Meng] Merge remote-tracking branch 'apache/master' into SPARK-5814
c5c4183 [Xiangrui Meng] merge master
0f20cad [Xiangrui Meng] add mima excludes
e53e9f4 [Xiangrui Meng] remove jblas from mllib runtime
ceaa14d [Xiangrui Meng] replace jblas by netlib-java in graphx
fa7c2ca [Xiangrui Meng] move jblas to test scope

The Thread.interrupt() can not terminate the thread in some cases, so we should not wait for the writerThread of PythonRDD.

This PR also ignore some exception during clean up.

cc JoshRosen mengxr

Author: Davies Liu <davies@databricks.com>

Closes #4987 from davies/fix_take and squashes the following commits:

4488f1a [Davies Liu] fix hang when call take() in JVM on PythonRDD

Author: Volodymyr Lyubinets <vlyubin@gmail.com>

Closes #4988 from vlyubin/columncomp and squashes the following commits:

92d7c8f [Volodymyr Lyubinets] Added equals to Column

Updates to the documentation are as follows:

- Added information on Kafka Direct API and Kafka Python API
- Added joins to the main streaming guide
- Improved details on the fault-tolerance semantics

Generated docs located here
http://people.apache.org/~tdas/spark-1.3.0-temp-docs/streaming-programming-guide.html#fault-tolerance-semantics

More things to add:
- Configuration for Kafka receive rate
- May be add concurrentJobs

Author: Tathagata Das <tathagata.das1565@gmail.com>

Closes #4956 from tdas/streaming-guide-update-1.3 and squashes the following commits:

819408c [Tathagata Das] Minor fixes.
debe484 [Tathagata Das] Added DataFrames and MLlib
380cf8d [Tathagata Das] Fix link
04167a6 [Tathagata Das] Merge remote-tracking branch 'apache-github/master' into streaming-guide-update-1.3
0b77486 [Tathagata Das] Updates based on Josh's comments.
86c4c2a [Tathagata Das] Updated streaming guides
82de92a [Tathagata Das] Add Kafka to Python api docs

Added Scala, Java and Python streaming examples showing DataFrame and SQL operations within streaming.

Author: Tathagata Das <tathagata.das1565@gmail.com>

Closes #4975 from tdas/streaming-sql-examples and squashes the following commits:

705cba1 [Tathagata Das] Fixed python lint error
75a3fad [Tathagata Das] Fixed python lint error
5fbf789 [Tathagata Das] Removed empty lines at the end
874b943 [Tathagata Das] Added examples streaming + sql examples.

Avoid `UnsupportedOperationException` from JsonRDD.inferSchema on empty RDD.

Not sure if this is supposed to be an error (but a better one), but it seems like this case can come up if the input is down-sampled so much that nothing is sampled.

Now stuff like this:
```
sqlContext.jsonRDD(sc.parallelize(List[String]()))
```
just results in
```
org.apache.spark.sql.DataFrame = []
```

Author: Sean Owen <sowen@cloudera.com>

Closes #4971 from srowen/SPARK-6245 and squashes the following commits:

3699964 [Sean Owen] Set() -> Set.empty
3c619e1 [Sean Owen] Avoid UnsupportedOperationException from JsonRDD.inferSchema on empty RDD

Author: Sandy Ryza <sandy@cloudera.com>

Closes #2490 from sryza/sandy-spark-3642 and squashes the following commits:

aae3340 [Sandy Ryza] SPARK-3642. Document the nuances of broadcast variables

[SPARK-4423] Improve foreach() documentation to avoid confusion between local- and cluster-mode behavior

Hi all - I've added a writeup on how closures work within Spark to help clarify the general case for this problem and similar problems. I hope this addresses the issue and would love any feedback.

Author: Ilya Ganelin <ilya.ganelin@capitalone.com>

Closes #4696 from ilganeli/SPARK-4423 and squashes the following commits:

c5dc498 [Ilya Ganelin] Fixed typo
07b78e8 [Ilya Ganelin] Updated to fix capitalization
48c1983 [Ilya Ganelin] Updated to fix capitalization and clarify wording
2fd2a07 [Ilya Ganelin] Incoporated a few more minor fixes. Fixed a bug in python code. Added semicolons for java
4772f99 [Ilya Ganelin] Incorporated latest feedback
448bd79 [Ilya Ganelin] Updated some verbage and added section links
5dbbda5 [Ilya Ganelin] Improved some wording
d374d3a [Ilya Ganelin] Merge remote-tracking branch 'upstream/master' into SPARK-4423
2600668 [Ilya Ganelin] Minor edits
c768ab2 [Ilya Ganelin] Updated documentation to add a section on closures. This helps understand confusing behavior of foreach and map functions when attempting to modify variables outside of the scope of an RDD action or transformation

.../common.

No code changes. Left the shuffle-related files in the shuffle module.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #4953 from vanzin/SPARK-6228 and squashes the following commits:

664ef30 [Marcelo Vanzin] [SPARK-6228] [network] Move SASL classes from network/shuffle to network/common.

Resolve javac, scalac warnings of various types -- deprecations, Scala lang, unchecked cast, etc.

Author: Sean Owen <sowen@cloudera.com>

Closes #4950 from srowen/SPARK-6225 and squashes the following commits:

3080972 [Sean Owen] Ordered imports: Java, Scala, 3rd party, Spark
c67985b [Sean Owen] Resolve javac, scalac warnings of various types -- deprecations, Scala lang, unchecked cast, etc.

In KafkaRDD.scala, Miss expressions flag "s" at logging string
In logging file, it print `Beginning offset $
{part.fromOffset}
is the same as ending offset ` but not `Beginning offset 111 is the same as ending offset `.

Author: zzcclp <xm_zzc@sina.com>

Closes #4979 from zzcclp/SPARK-6279 and squashes the following commits:

768f88e [zzcclp] Miss expressions flag "s"

Removed an repeated "from" in the comments.

Author: Hongbo Liu <liuhb86@gmail.com>

Closes #4976 from liuhb86/mine and squashes the following commits:

e280e7c [Hongbo Liu] [SQL][Minor] fix typo in comments

Fix map -> mapToPair in Java example. (And zap some unneeded "throws Exception" while here)

Author: Sean Owen <sowen@cloudera.com>

Closes #4967 from srowen/MapToPairFix and squashes the following commits:

ded2bc0 [Sean Owen] Fix map -> mapToPair in Java example. (And zap some unneeded "throws Exception" while here)

This change encapsulates all the logic involved in launching a Spark job
into a small Java library that can be easily embedded into other applications.

The overall goal of this change is twofold, as described in the bug:

- Provide a public API for launching Spark processes. This is a common request
  from users and currently there's no good answer for it.

- Remove a lot of the duplicated code and other coupling that exists in the
  different parts of Spark that deal with launching processes.

A lot of the duplication was due to different code needed to build an
application's classpath (and the bootstrapper needed to run the driver in
certain situations), and also different code needed to parse spark-submit
command line options in different contexts. The change centralizes those
as much as possible so that all code paths can rely on the library for
handling those appropriately.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #3916 from vanzin/SPARK-4924 and squashes the following commits:

18c7e4d [Marcelo Vanzin] Fix make-distribution.sh.
2ce741f [Marcelo Vanzin] Add lots of quotes.
3b28a75 [Marcelo Vanzin] Update new pom.
a1b8af1 [Marcelo Vanzin] Merge branch 'master' into SPARK-4924
897141f [Marcelo Vanzin] Review feedback.
e2367d2 [Marcelo Vanzin] Merge branch 'master' into SPARK-4924
28cd35e [Marcelo Vanzin] Remove stale comment.
b1d86b0 [Marcelo Vanzin] Merge branch 'master' into SPARK-4924
00505f9 [Marcelo Vanzin] Add blurb about new API in the programming guide.
5f4ddcc [Marcelo Vanzin] Better usage messages.
92a9cfb [Marcelo Vanzin] Fix Win32 launcher, usage.
6184c07 [Marcelo Vanzin] Rename field.
4c19196 [Marcelo Vanzin] Update comment.
7e66c18 [Marcelo Vanzin] Fix pyspark tests.
0031a8e [Marcelo Vanzin] Review feedback.
c12d84b [Marcelo Vanzin] Review feedback. And fix spark-submit on Windows.
e2d4d71 [Marcelo Vanzin] Simplify some code used to launch pyspark.
43008a7 [Marcelo Vanzin] Don't make builder extend SparkLauncher.
b4d6912 [Marcelo Vanzin] Use spark-submit script in SparkLauncher.
28b1434 [Marcelo Vanzin] Add a comment.
304333a [Marcelo Vanzin] Fix propagation of properties file arg.
bb67b93 [Marcelo Vanzin] Remove unrelated Yarn change (that is also wrong).
8ec0243 [Marcelo Vanzin] Add missing newline.
95ddfa8 [Marcelo Vanzin] Fix handling of --help for spark-class command builder.
72da7ec [Marcelo Vanzin] Rename SparkClassLauncher.
62978e4 [Marcelo Vanzin] Minor cleanup of Windows code path.
9cd5b44 [Marcelo Vanzin] Make all non-public APIs package-private.
e4c80b6 [Marcelo Vanzin] Reorganize the code so that only SparkLauncher is public.
e50dc5e [Marcelo Vanzin] Merge branch 'master' into SPARK-4924
de81da2 [Marcelo Vanzin] Fix CommandUtils.
86a87bf [Marcelo Vanzin] Merge branch 'master' into SPARK-4924
2061967 [Marcelo Vanzin] Merge branch 'master' into SPARK-4924
46d46da [Marcelo Vanzin] Clean up a test and make it more future-proof.
b93692a [Marcelo Vanzin] Merge branch 'master' into SPARK-4924
ad03c48 [Marcelo Vanzin] Revert "Fix a thread-safety issue in "local" mode."
0b509d0 [Marcelo Vanzin] Merge branch 'master' into SPARK-4924
23aa2a9 [Marcelo Vanzin] Read java-opts from conf dir, not spark home.
7cff919 [Marcelo Vanzin] Javadoc updates.
eae4d8e [Marcelo Vanzin] Fix new unit tests on Windows.
e570fb5 [Marcelo Vanzin] Merge branch 'master' into SPARK-4924
44cd5f7 [Marcelo Vanzin] Add package-info.java, clean up javadocs.
f7cacff [Marcelo Vanzin] Remove "launch Spark in new thread" feature.
7ed8859 [Marcelo Vanzin] Some more feedback.
54cd4fd [Marcelo Vanzin] Merge branch 'master' into SPARK-4924
61919df [Marcelo Vanzin] Clean leftover debug statement.
aae5897 [Marcelo Vanzin] Use launcher classes instead of jars in non-release mode.
e584fc3 [Marcelo Vanzin] Rework command building a little bit.
525ef5b [Marcelo Vanzin] Rework Unix spark-class to handle argument with newlines.
8ac4e92 [Marcelo Vanzin] Minor test cleanup.
e946a99 [Marcelo Vanzin] Merge PySparkLauncher into SparkSubmitCliLauncher.
c617539 [Marcelo Vanzin] Review feedback round 1.
fc6a3e2 [Marcelo Vanzin] Merge branch 'master' into SPARK-4924
f26556b [Marcelo Vanzin] Fix a thread-safety issue in "local" mode.
2f4e8b4 [Marcelo Vanzin] Changes needed to make this work with SPARK-4048.
799fc20 [Marcelo Vanzin] Merge branch 'master' into SPARK-4924
bb5d324 [Marcelo Vanzin] Merge branch 'master' into SPARK-4924
53faef1 [Marcelo Vanzin] Merge branch 'master' into SPARK-4924
a7936ef [Marcelo Vanzin] Fix pyspark tests.
656374e [Marcelo Vanzin] Mima fixes.
4d511e7 [Marcelo Vanzin] Fix tools search code.
7a01e4a [Marcelo Vanzin] Fix pyspark on Yarn.
1b3f6e9 [Marcelo Vanzin] Call SparkSubmit from spark-class launcher for unknown classes.
25c5ae6 [Marcelo Vanzin] Centralize SparkSubmit command line parsing.
27be98a [Marcelo Vanzin] Modify Spark to use launcher lib.
6f70eea [Marcelo Vanzin] [SPARK-4924] Add a library for launching Spark jobs programatically.

This PR adds save/load for K-means as described in SPARK-5986. Python version will be added in another PR.

Author: Xusen Yin <yinxusen@gmail.com>

Closes #4951 from yinxusen/SPARK-5986 and squashes the following commits:

6dd74a0 [Xusen Yin] rewrite some functions and classes
cd390fd [Xusen Yin] add indexed point
b144216 [Xusen Yin] remove invalid comments
dce7055 [Xusen Yin] add save/load for k-means for SPARK-5986

Author: Michael Armbrust <michael@databricks.com>

Closes #4958 from marmbrus/sqlDocs and squashes the following commits:

9351dbc [Michael Armbrust] fix parquet example
6877e13 [Michael Armbrust] add sql examples
d81b7e7 [Michael Armbrust] rxins comments
e393528 [Michael Armbrust] fix order
19c2735 [Michael Armbrust] more on data source load/store
00d5914 [Michael Armbrust] Update SQL Docs with JDBC and Migration Guide

The extra blank line is preventing the first lines from showing up in the package summary page.

Author: Reynold Xin <rxin@databricks.com>

Closes #4955 from rxin/datatype-docs and squashes the following commits:

1621114 [Reynold Xin] Minor doc: Remove the extra blank line in data types javadoc.

This PR comes from Tachyon community to solve the issue:
https://tachyon.atlassian.net/browse/TACHYON-11

An accompanying PR is in mesos/spark-ec2:
https://github.com/mesos/spark-ec2/pull/101

Author: cheng chang <myairia@gmail.com>

Closes #4901 from uronce-cc/master and squashes the following commits:

313aa36 [cheng chang] minor re-wording
fd2a48e [cheng chang] Remove Tachyon when deploying through git hash
1d53c5c [cheng chang] add default value to --tachyon-version
6f8887e [cheng chang] make tachyon version configurable

Right now we have a method to specifically download boto. This PR generalizes it so it's easy to download additional libraries if we want.

For example, adding new external libraries for spark-ec2 is now as simple as:

```python
external_libs = [
    {
         "name": "boto",
         "version": "2.34.0",
         "md5": "5556223d2d0cc4d06dd4829e671dcecd"
    },
    {
        "name": "PyYAML",
        "version": "3.11",
        "md5": "f50e08ef0fe55178479d3a618efe21db"
    },
    {
        "name": "argparse",
        "version": "1.3.0",
        "md5": "9bcf7f612190885c8c85e30ba41db3c7"
    }
]
```
Likely use cases:
* Downloading PyYAML to allow spark-ec2 configs to be persisted as a YAML file. ([SPARK-925](https://issues.apache.org/jira/browse/SPARK-925))
* Downloading argparse to clean up / modernize our option parsing.

First run output, with PyYAML and argparse added just for demonstration purposes:

```shell
$ ./spark-ec2 --version
Downloading external libraries that spark-ec2 needs from PyPI to /path/to/spark/ec2/lib...
This should be a one-time operation.
 - Downloading boto...
 - Finished downloading boto.
 - Downloading PyYAML...
 - Finished downloading PyYAML.
 - Downloading argparse...
 - Finished downloading argparse.
spark-ec2 1.2.1
```

Output thereafter:

```shell
$ ./spark-ec2 --version
spark-ec2 1.2.1
```

Author: Nicholas Chammas <nicholas.chammas@gmail.com>

Closes #4919 from nchammas/setup-ec2-libs and squashes the following commits:

a077955 [Nicholas Chammas] print default region
c95fb7d [Nicholas Chammas] to docstring
5448845 [Nicholas Chammas] remove libs added for demo purposes
60d8c23 [Nicholas Chammas] generalize ability to download libs

A simple try-catch wrapping KryoException to be more informative.

Author: Lev Khomich <levkhomich@gmail.com>

Closes #4947 from levkhomich/master and squashes the following commits:

0f7a947 [Lev Khomich] [SPARK-6087][CORE] Provide actionable exception if Kryo buffer is not large enough

JIRA: https://issues.apache.org/jira/browse/SPARK-6177
Add comment to introduce coalesce to LDA example to avoid the possible massive partitions from `sc.textFile`.

sc.textFile will create RDD with one partition for each file, and the possible massive partitions downgrades LDA performance.

Author: Yuhao Yang <hhbyyh@gmail.com>

Closes #4899 from hhbyyh/adjustPartition and squashes the following commits:

a499630 [Yuhao Yang] update comment
9a2d7b6 [Yuhao Yang] move to comment
f7fd5d4 [Yuhao Yang] Merge remote-tracking branch 'upstream/master' into adjustPartition
26a564a [Yuhao Yang] add coalesce to LDAExample

Because circular reference between JavaObject and JavaMember, an Java object can not be released until Python GC kick in, then it will cause memory leak in collect(), which may consume lots of memory in JVM.

This PR change the way we sending collected data back into Python from local file to socket, which could avoid any disk IO during collect, also avoid any referrers of Java object in Python.

cc JoshRosen

Author: Davies Liu <davies@databricks.com>

Closes #4923 from davies/fix_collect and squashes the following commits:

d730286 [Davies Liu] address comments
24c92a4 [Davies Liu] fix style
ba54614 [Davies Liu] use socket to transfer data from JVM
9517c8f [Davies Liu] fix memory leak in collect()

Author: Reynold Xin <rxin@databricks.com>

Closes #4954 from rxin/df-docs and squashes the following commits:

c592c70 [Reynold Xin] [SPARK-5310][Doc] Update SQL Programming Guide to include DataFrames.

Author: Reynold Xin <rxin@databricks.com>

Closes #4952 from rxin/schemardd-df-reference and squashes the following commits:

b2b1dbe [Reynold Xin] [Docs] Replace references to SchemaRDD with DataFrame

As described in https://issues.apache.org/jira/browse/SPARK-6188 and discovered in https://issues.apache.org/jira/browse/SPARK-5838.

When re-starting a cluster, if the user does not provide the instance types, which is the recommended behavior in the docs currently, the instance will be assigned the default type m1.large. This then affects the setup of the machines.

This solves this by getting the instance types from the existing instances, and overwriting the default options.

EDIT: Further clarification of the issue:

In short, while the instances themselves are the same as launched, their setup is done assuming the default instance type, m1.large.

This means that the machines are assumed to have 2 disks, and that leads to problems that are described in in issue [5838](https://issues.apache.org/jira/browse/SPARK-5838), where machines that have one disk end up having shuffle spills in the in the small (8GB) snapshot partitions that quickly fills up and results in failing jobs due to "No space left on device" errors.

Other instance specific settings that are set in the spark_ec2.py script are likely to be wrong as well.

Author: Theodore Vasiloudis <thvasilo@users.noreply.github.com>
Author: Theodore Vasiloudis <tvas@sics.se>

Closes #4916 from thvasilo/SPARK-6188]-Instance-types-can-be-mislabeled-when-re-starting-cluster-with-default-arguments and squashes the following commits:

6705b98 [Theodore Vasiloudis] Added comment to clarify setting master instance type to the empty string.
a3d29fe [Theodore Vasiloudis] More trailing whitespace
7b32429 [Theodore Vasiloudis] Removed trailing whitespace
3ebd52a [Theodore Vasiloudis] Make sure that the instance type is correct when relaunching a cluster.

1. Removed unnecessary import
2. Modified usage print since user must specify the --numEPart parameter as it is required in Analytics.main

Author: Jacky Li <jacky.likun@huawei.com>

Closes #4917 from jackylk/import and squashes the following commits:

6c07682 [Jacky Li] fix comment
c0df8f2 [Jacky Li] fix scalastyle
b6235e6 [Jacky Li] fix for comment
87be83b [Jacky Li] remove default value description
5caae76 [Jacky Li] remove import and modify usage

Add xml-apis to core test deps to work aroudn UISeleniumSuite classpath issue

Author: Sean Owen <sowen@cloudera.com>

Closes #4933 from srowen/SPARK-6205 and squashes the following commits:

ddd4d32 [Sean Owen] Add xml-apis to core test deps to work aroudn UISeleniumSuite classpath issue

When looking for a cluster, spark-ec2 currently pulls down [info for all instances](https://github.com/apache/spark/blob/eb48fd6e9d55fb034c00e61374bb9c2a86a82fb8/ec2/spark_ec2.py#L620) and filters locally. When working on an AWS account with hundreds of active instances, this step alone can take over 10 seconds.

This PR improves how spark-ec2 searches for clusters by pushing the filter up to EC2.

Basically, the problem (and solution) look like this:

```python
>>> timeit.timeit('blah = conn.get_all_reservations()', setup='from __main__ import conn', number=10)
116.96390509605408
>>> timeit.timeit('blah = conn.get_all_reservations(filters={"instance.group-name": ["my-cluster-master"]})', setup='from __main__ import conn', number=10)
4.629754066467285
```

Translated to a user-visible action, this looks like (against an AWS account with ~200 active instances):

```shell
# master
$ python -m timeit -n 3 --setup 'import subprocess' 'subprocess.call("./spark-ec2 get-master my-cluster --region us-west-2", shell=True)'
...
3 loops, best of 3: 9.83 sec per loop

# this PR
$ python -m timeit -n 3 --setup 'import subprocess' 'subprocess.call("./spark-ec2 get-master my-cluster --region us-west-2", shell=True)'
...
3 loops, best of 3: 1.47 sec per loop
```

This PR also refactors `get_existing_cluster()` to make it, I hope, simpler.

Finally, this PR fixes some minor grammar issues related to printing status to the user.  

Author: Nicholas Chammas <nicholas.chammas@gmail.com>

Closes #4922 from nchammas/get-existing-cluster-faster and squashes the following commits:

18802f1 [Nicholas Chammas] ignore shutting-down
f2a5b9f [Nicholas Chammas] fix grammar
d96a489 [Nicholas Chammas] push group filter up to EC2

Give users an easy way to rcp a directory structure to the master's / as part of the cluster launch, at a useful point in the workflow (before setup.sh is called on the master).

This is an alternative approach to meeting requirements discussed in https://github.com/apache/spark/pull/4487

Author: Florian Verhein <florian.verhein@gmail.com>

Closes #4583 from florianverhein/master and squashes the following commits:

49dee88 [Florian Verhein] removed addition of trailing / in rsync to give user this option, added documentation in help
7b8e3d8 [Florian Verhein] remove unused args
87d922c [Florian Verhein] [SPARK-5641] [EC2] implement --deploy-root-dir

Found it by accident. I'm not gonna file jira for this as it is a very tiny fix.

Author: WangTaoTheTonic <wangtao111@huawei.com>

Closes #4936 from WangTaoTheTonic/wrongdesc and squashes the following commits:

fb8a8ec [WangTaoTheTonic] fix the wrong description
aca5596 [WangTaoTheTonic] fix the wrong description

The PR reorders some print statements slightly on cluster termination so that they read better.

For example, from this:

```
Are you sure you want to destroy the cluster spark-cluster-test?
The following instances will be terminated:
Searching for existing cluster spark-cluster-test in region us-west-2...
Found 1 master(s), 2 slaves
> ...
ALL DATA ON ALL NODES WILL BE LOST!!
Destroy cluster spark-cluster-test (y/N):
```

To this:

```
Searching for existing cluster spark-cluster-test in region us-west-2...
Found 1 master(s), 2 slaves
The following instances will be terminated:
> ...
ALL DATA ON ALL NODES WILL BE LOST!!
Are you sure you want to destroy the cluster spark-cluster-test? (y/N)
```

Author: Nicholas Chammas <nicholas.chammas@gmail.com>

Closes #4932 from nchammas/termination-print-order and squashes the following commits:

c23711d [Nicholas Chammas] reorder prints on termination

Author: RobertZK <technoguyrob@gmail.com>
Author: Robert Krzyzanowski <technoguyrob@gmail.com>

Closes #4840 from robertzk/patch-1 and squashes the following commits:

d286215 [RobertZK] lambda fix per @laserson
5937989 [Robert Krzyzanowski] Fix python typo

Author: Vinod K C <vinod.kchuawei.com>

Author: Vinod K C <vinod.kc@huawei.com>

Closes #4900 from vinodkc/unused_imports and squashes the following commits:

5373456 [Vinod K C] Removed empty lines
9da7438 [Vinod K C] Changed order of import
594d471 [Vinod K C] Removed unused imports

Resolve sbt warnings:

```
[warn] spark/streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogManager.scala:155: postfix operator second should be enabled
[warn] by making the implicit value scala.language.postfixOps visible.
[warn] This can be achieved by adding the import clause 'import scala.language.postfixOps'
[warn] or by setting the compiler option -language:postfixOps.
[warn] See the Scala docs for value scala.language.postfixOps for a discussion
[warn] why the feature should be explicitly enabled.
[warn]         Await.ready(f, 1 second)
[warn]                          ^
```

Author: GuoQiang Li <witgo@qq.com>

Closes #4908 from witgo/sbt_warnings and squashes the following commits:

0629af4 [GuoQiang Li] Resolve sbt warnings: postfix operator second should be enabled

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #4921 from vanzin/utils-suite and squashes the following commits:

7795dd4 [Marcelo Vanzin] [core] [minor] Don't pollute source directory when running UtilsSuite.

The help message for starting `worker` is `Usage: Worker [options] <master>`. While in `start-slaves.sh`, the format is not align with that, it is confusing for the fist glance.

Author: Zhang, Liye <liye.zhang@intel.com>

Closes #4924 from liyezhang556520/startSlaves and squashes the following commits:

7fd5deb [Zhang, Liye] align arguments order with docs of worker