Author: baishuo <vc_java@hotmail.com>

Closes #3526 from baishuo/master-trycatch and squashes the following commits:

d446e14 [baishuo] correct the code style
b36bf96 [baishuo] correct the code style
ae0e447 [baishuo] add finally to avoid resource leak

Spark SQL has embeded sqrt and abs but DSL doesn't support those functions.

Author: Kousuke Saruta <sarutak@oss.nttdata.co.jp>

Closes #3401 from sarutak/dsl-missing-operator and squashes the following commits:

07700cf [Kousuke Saruta] Modified Literal(null, NullType) to Literal(null) in DslQuerySuite
8f366f8 [Kousuke Saruta] Merge branch 'master' of git://git.apache.org/spark into dsl-missing-operator
1b88e2e [Kousuke Saruta] Merge branch 'master' of git://git.apache.org/spark into dsl-missing-operator
0396f89 [Kousuke Saruta] Added sqrt and abs to Spark SQL DSL

A very small nit update.

Author: Reynold Xin <rxin@databricks.com>

Closes #3552 from rxin/license-header and squashes the following commits:

df8d1a4 [Reynold Xin] Indent license header properly for interfaces.scala.

The link points to the old scala programming guide; it should point to the submitting applications page.

This should be backported to 1.1.2 (it's been broken as of 1.0).

Author: Kay Ousterhout <kayousterhout@gmail.com>

Closes #3542 from kayousterhout/SPARK-4686 and squashes the following commits:

a8fc43b [Kay Ousterhout] [SPARK-4686] Link to allowed master URLs is broken

This PR cleans up `import SparkContext._` in core for SPARK-4397(#3262) to prove it really works well.

Author: zsxwing <zsxwing@gmail.com>

Closes #3530 from zsxwing/SPARK-4397-cleanup and squashes the following commits:

04e2273 [zsxwing] Cleanup 'import SparkContext._' in core

The vector norm in breeze is implemented by `activeIterator` which is known to be very slow.
In this PR, an efficient vector norm is implemented, and with this API, `Normalizer` and
`k-means` have big performance improvement.

Here is the benchmark against mnist8m dataset.

a) `Normalizer`
Before
DenseVector: 68.25secs
SparseVector: 17.01secs

With this PR
DenseVector: 12.71secs
SparseVector: 2.73secs

b) `k-means`
Before
DenseVector: 83.46secs
SparseVector: 61.60secs

With this PR
DenseVector: 70.04secs
SparseVector: 59.05secs

Author: DB Tsai <dbtsai@alpinenow.com>

Closes #3462 from dbtsai/norm and squashes the following commits:

63c7165 [DB Tsai] typo
0c3637f [DB Tsai] add import org.apache.spark.SparkContext._ back
6fa616c [DB Tsai] address feedback
9b7cb56 [DB Tsai] move norm to static method
0b632e6 [DB Tsai] kmeans
dbed124 [DB Tsai] style
c1a877c [DB Tsai] first commit

This commit exists to close the following pull requests on Github:

Closes #1612 (close requested by 'marmbrus')
Closes #2723 (close requested by 'marmbrus')
Closes #1737 (close requested by 'marmbrus')
Closes #2252 (close requested by 'marmbrus')
Closes #2029 (close requested by 'marmbrus')
Closes #2386 (close requested by 'marmbrus')
Closes #2997 (close requested by 'marmbrus')

In addition, using `s.isEmpty` to eliminate the string comparison.

Author: zsxwing <zsxwing@gmail.com>

Closes #3132 from zsxwing/SPARK-4268 and squashes the following commits:

358e235 [zsxwing] Improvement of allCaseVersions

Support view definition like

CREATE VIEW view3(valoo)
TBLPROPERTIES ("fear" = "factor")
AS SELECT upper(value) FROM src WHERE key=86;

[valoo as the alias of upper(value)]. This is missing part of SPARK-4239, for a fully view support.

Author: Daoyuan Wang <daoyuan.wang@intel.com>

Closes #3396 from adrian-wang/viewcolumn and squashes the following commits:

4d001d0 [Daoyuan Wang] support view with column alias

Author: Daoyuan Wang <daoyuan.wang@intel.com>

Closes #3535 from adrian-wang/datedoc and squashes the following commits:

18ff1ed [Daoyuan Wang] [DOC] Date type

Author: wangfei <wangfei1@huawei.com>

Closes #3533 from scwf/sql-doc1 and squashes the following commits:

962910b [wangfei] doc and comment fix

Author: ravipesala <ravindra.pesala@huawei.com>

Closes #3516 from ravipesala/ddl_doc and squashes the following commits:

d101fdf [ravipesala] Style issues fixed
d2238cd [ravipesala] Corrected documentation

[SPARK-4650][SQL] Supporting multi column support in countDistinct function like count(distinct c1,c2..) in Spark SQL

Supporting multi column support in countDistinct function like count(distinct c1,c2..) in Spark SQL

Author: ravipesala <ravindra.pesala@huawei.com>
Author: Michael Armbrust <michael@databricks.com>

Closes #3511 from ravipesala/countdistinct and squashes the following commits:

cc4dbb1 [ravipesala] style
070e12a [ravipesala] Supporting multi column support in count(distinct c1,c2..) in Spark SQL

Remove hardcoding max and min values for types. Let BigDecimal do checking type compatibility.

Author: Liang-Chi Hsieh <viirya@gmail.com>

Closes #3208 from viirya/more_numericLit and squashes the following commits:

e9834b4 [Liang-Chi Hsieh] Remove byte and short types for number literal.
1bd1825 [Liang-Chi Hsieh] Fix Indentation and make the modification clearer.
cf1a997 [Liang-Chi Hsieh] Modified for comment to add a rule of analysis that adds a cast.
91fe489 [Liang-Chi Hsieh] add Byte and Short.
1bdc69d [Liang-Chi Hsieh] Let BigDecimal do checking type compatibility.

group tab is missing for scaladoc

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

Closes #3458 from jackylk/patch-7 and squashes the following commits:

0121a70 [Jacky Li] add @group tab in limit() and count()

Documents `spark.sql.parquet.filterPushdown`, explains why it's turned off by default and when it's safe to be turned on.

<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/apache/spark/3440)
<!-- Reviewable:end -->

Author: Cheng Lian <lian@databricks.com>

Closes #3440 from liancheng/parquet-filter-pushdown-doc and squashes the following commits:

2104311 [Cheng Lian] Documents spark.sql.parquet.filterPushdown

Author: Madhu Siddalingaiah <madhu@madhu.com>

Closes #3390 from msiddalingaiah/master and squashes the following commits:

cbccbfe [Madhu Siddalingaiah] Documentation: replace <b> with <code> (again)
332f7a2 [Madhu Siddalingaiah] Documentation: replace <b> with <code>
cd2b05a [Madhu Siddalingaiah] Merge remote-tracking branch 'upstream/master'
0fc12d7 [Madhu Siddalingaiah] Documentation: add description for repartitionAndSortWithinPartitions

Author: zsxwing <zsxwing@gmail.com>

Closes #3521 from zsxwing/SPARK-4661 and squashes the following commits:

03cbe3f [zsxwing] Minor code and docs cleanup

If `spark.akka.frameSize` > 2047, it will overflow and become negative. Should have some assertion in `maxFrameSizeBytes` to warn people.

Author: zsxwing <zsxwing@gmail.com>

Closes #3527 from zsxwing/SPARK-4664 and squashes the following commits:

0089c7a [zsxwing] Throw an exception when spark.akka.frameSize > 2047

Simply, add data/ to distributions. This adds about 291KB (compressed) to the tarball, FYI.

Author: Sean Owen <sowen@cloudera.com>

Closes #3480 from srowen/SPARK-2192 and squashes the following commits:

47688f1 [Sean Owen] Add data/ to distributions

In .gitignore, there is an entry for spark-*-bin.tar.gz but considering make-distribution.sh, the name pattern should be spark-*-bin-*.tgz.

This change is really small so I don't open issue in JIRA. If it's needed, please let me know.

Author: Kousuke Saruta <sarutak@oss.nttdata.co.jp>

Closes #3529 from sarutak/fix-wrong-tgz-pattern and squashes the following commits:

de3c70a [Kousuke Saruta] Fixed wrong file name pattern in .gitignore

Author: Prabeesh K <prabsmails@gmail.com>

Closes #3495 from prabeesh/master and squashes the following commits:

ab03d50 [Prabeesh K] Update pom.xml
8c6437e [Prabeesh K] Revert
e10b40a [Prabeesh K] version update
dbac9eb [Prabeesh K] Revert
ec0b1c3 [Prabeesh K] [SPARK-4632] version update
a835505 [Prabeesh K] [SPARK-4632] version update
831391b [Prabeesh K]  [SPARK-4632] version update

This commit exists to close the following pull requests on Github:

Closes #2915 (close requested by 'JoshRosen')
Closes #3140 (close requested by 'JoshRosen')
Closes #3366 (close requested by 'JoshRosen')

<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/apache/spark/3498)
<!-- Reviewable:end -->

Author: Cheng Lian <lian@databricks.com>

Closes #3498 from liancheng/fix-sql-doc-typo and squashes the following commits:

865ecd7 [Cheng Lian] Fixes formatting typo in SQL programming guide

Grammatical error in Programming Guide document

Author: lewuathe <lewuathe@me.com>

Closes #3412 from Lewuathe/typo-programming-guide and squashes the following commits:

a3e2f00 [lewuathe] Typo in Programming Guide markdown

If using spark-sql in yarn-cluster mode, print an error infomation just as the spark shell in yarn-cluster mode.

Author: carlmartin <carlmartinmax@gmail.com>
Author: huangzhaowei <carlmartinmax@gmail.com>

Closes #3479 from SaintBacchus/sparkSqlShell and squashes the following commits:

35829a9 [carlmartin] improve the description of comment
e6c1eb7 [carlmartin] add a comment in bin/spark-sql to remind user who wants to change the class
f1c5c8d [carlmartin] Merge branch 'master' into sparkSqlShell
8e112c5 [huangzhaowei] singular form
ec957bc [carlmartin] Add the some error infomation if using spark-sql in yarn-cluster mode
7bcecc2 [carlmartin] Merge branch 'master' of https://github.com/apache/spark into codereview
4fad75a [carlmartin] Add the Error infomation using spark-sql in yarn-cluster mode

This PR adds the Spark version number to the UI footer; this is how it looks:

![screen shot 2014-11-21 at 22 58 40](https://cloud.githubusercontent.com/assets/822522/5157738/f4822094-7316-11e4-98f1-333a535fdcfa.png)

Author: Sean Owen <sowen@cloudera.com>

Closes #3410 from srowen/SPARK-2143 and squashes the following commits:

e9b3a7a [Sean Owen] Add Spark version to footer

To build with Scala 2.11, we have to execute `change-version-to-2.11.sh` before Maven execute, otherwise inter-module dependencies are broken.

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

Closes #3361 from ueshin/docs/building-spark_2.11 and squashes the following commits:

1d29126 [Takuya UESHIN] Add instruction to use change-version-to-2.11.sh in 'Building for Scala 2.11'.

This will fix SPARK-4507.

For pull requests that reference multiple JIRAs in their titles, it would be helpful if the PR merge script offered to close all of them.

Author: Takayuki Hasegawa <takayuki.hasegawa0311@gmail.com>

Closes #3428 from hase1031/SPARK-4507 and squashes the following commits:

bf6d64b [Takayuki Hasegawa] SPARK-4507: try to resolve issue when no JIRAs in title
401224c [Takayuki Hasegawa] SPARK-4507: moved codes as before
ce89021 [Takayuki Hasegawa] SPARK-4507: PR merge script should support closing multiple JIRA tickets

Added a ClassTag parameter to CompactBuffer. So CompactBuffer[T] can create primitive arrays for primitive types. It will reduce the memory usage for primitive types significantly and only pay minor performance lost.

Here is my test code:
```Scala
  // Call org.apache.spark.util.SizeEstimator.estimate
  def estimateSize(obj: AnyRef): Long = {
    val c = Class.forName("org.apache.spark.util.SizeEstimator$")
    val f = c.getField("MODULE$")
    val o = f.get(c)
    val m = c.getMethod("estimate", classOf[Object])
    m.setAccessible(true)
    m.invoke(o, obj).asInstanceOf[Long]
  }

  sc.parallelize(1 to 10000).groupBy(_ => 1).foreach {
    case (k, v) =>
      println(v.getClass() + " size: " + estimateSize(v))
  }
```

Using the previous CompactBuffer outputed
```
class org.apache.spark.util.collection.CompactBuffer size: 313358
```

Using the new CompactBuffer outputed
```
class org.apache.spark.util.collection.CompactBuffer size: 65712
```

In this case, the new `CompactBuffer` only used 20% memory of the previous one. It's really helpful for `groupByKey` when using a primitive value.

Author: zsxwing <zsxwing@gmail.com>

Closes #3378 from zsxwing/SPARK-4505 and squashes the following commits:

4abdbba [zsxwing] Add a ClassTag parameter to reduce the memory usage of CompactBuffer[T] when T is a primitive type

In -launch-lib.bash, -Xdebug option is used for debugging. We should use -agentlib option for Java 6+.

Author: Kousuke Saruta <sarutak@oss.nttdata.co.jp>

Closes #2904 from sarutak/SPARK-4057 and squashes the following commits:

39b5320 [Kousuke Saruta] Merge branch 'master' of git://git.apache.org/spark into SPARK-4057
26b4af8 [Kousuke Saruta] Improved java option for debugging

Admittedly a really small tweak.

Author: Stephen Haberman <stephen@exigencecorp.com>

Closes #3514 from stephenh/include-key-name-in-npe and squashes the following commits:

937740a [Stephen Haberman] Include the key name when failing on an invalid value.

This PR re-introduces [0e648bc](https://github.com/apache/spark/commit/0e648bc2bedcbeb55fce5efac04f6dbad9f063b4) from PR #2339, which somehow never made it into the codebase.

Additionally, it removes a now-unnecessary linear backoff on the SSH checks since we are blocking on EC2 status checks before testing SSH.

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

Closes #3195 from nchammas/remove-ec2-ssh-backoff and squashes the following commits:

efb29e1 [Nicholas Chammas] Revert "Remove linear backoff."
ef3ca99 [Nicholas Chammas] reuse conn
adb4eaa [Nicholas Chammas] Remove linear backoff.
55caa24 [Nicholas Chammas] Check EC2 status checks before SSH.

This commit exists to close the following pull requests on Github:

Closes #3451 (close requested by 'pwendell')
Closes #1310 (close requested by 'pwendell')
Closes #3207 (close requested by 'JoshRosen')

`File.exists()` and `File.mkdirs()` only throw `SecurityException` instead of `IOException`. Then, when an exception is thrown, `dir` should be reset too.

Author: Liang-Chi Hsieh <viirya@gmail.com>

Closes #3449 from viirya/fix_createtempdir and squashes the following commits:

36cacbd [Liang-Chi Hsieh] Use proper exception and reset variable.

This looks like a one-liner, so I took a shot at it. There can be no fixed default availability zone since the names are different per region. But the default behavior can be documented:

```
    if opts.zone == "":
        opts.zone = random.choice(conn.get_all_zones()).name
```

Author: Sean Owen <sowen@cloudera.com>

Closes #3454 from srowen/SPARK-1450 and squashes the following commits:

9193cf3 [Sean Owen] Document that --zone defaults to a single random zone

The security manager adds a lot of overhead to the runtime of the
app, and causes a severe performance regression. Even stubbing out
all unneeded methods (all except checkExit()) does not help.

So, instead, penalize users who do an explicit System.exit() by leaving
them in "undefined behavior" territory: if they do that, the Yarn
backend won't be able to report the final app status to the RM.
The result is that the final status of the application might not match
the user's expectations.

One side-effect of the change is that users who do an explicit
System.exit() will lose the AM retry functionality. Since there is
no way to know if the exit was because of success or failure, the
AM right now errs on the side of it being a successful exit.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #3484 from vanzin/SPARK-4584 and squashes the following commits:

21f2502 [Marcelo Vanzin] Do not retry apps that use System.exit().
4198b3b [Marcelo Vanzin] [SPARK-4584] [yarn] Remove security manager from Yarn AM.

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

Closes #3058 from ueshin/issues/SPARK-4193 and squashes the following commits:

e096bb1 [Takuya UESHIN] Add a plugin declaration to pluginManagement.
6762ec2 [Takuya UESHIN] Fix usage of -Xdoclint javadoc option.
fdb280a [Takuya UESHIN] Fix Javadoc errors.
4745f3c [Takuya UESHIN] Merge branch 'master' into issues/SPARK-4193
923e2f0 [Takuya UESHIN] Use doclint option `-missing` instead of `none`.
30d6718 [Takuya UESHIN] Fix Javadoc errors.
b548017 [Takuya UESHIN] Disable doclint in Java 8 to prevent from build error.

The old location will return a 404.

Author: Daoyuan Wang <daoyuan.wang@intel.com>

Closes #3504 from adrian-wang/repo and squashes the following commits:

f604e05 [Daoyuan Wang] already in maven central, remove at all
f494fac [Daoyuan Wang] spark staging repo outdated

when building spark by sbt, the function “runAlternateBoot" in sbt/sbt-launch-lib.bash is not used. And this function is not used by spark code. So I think this function is not necessary. And the option of "sbt.boot.properties" can be configured in the command line when building spark, eg:
sbt/sbt assembly -Dsbt.boot.properties=$bootpropsfile.

The file from https://github.com/sbt/sbt-launcher-package is changed. And the function “runAlternateBoot" is deleted in upstream project. I think spark project should delete this function in file sbt/sbt-launch-lib.bash. Thanks.

Author: KaiXinXiaoLei <huleilei1@huawei.com>

Closes #3224 from KaiXinXiaoLei/deleteFunction and squashes the following commits:

e8eac49 [KaiXinXiaoLei] Delete blank lines.
efe36d4 [KaiXinXiaoLei] Delete unnecessary function