[SPARK-4373][MLLIB] fix MLlib maven tests

We want to make sure there is at most one spark context inside the same jvm. JoshRosen

Author: Xiangrui Meng <meng@databricks.com>

Closes #3235 from mengxr/SPARK-4373 and squashes the following commits:

6574b69 [Xiangrui Meng] rename LocalSparkContext to MLlibTestSparkContext
913d48d [Xiangrui Meng] make sure there is at most one spark context inside the same jvm
[SPARK-4370] [Core] Limit number of Netty cores based on executor size

Author: Aaron Davidson <aaron@databricks.com>

Closes #3155 from aarondav/conf and squashes the following commits:

7045e77 [Aaron Davidson] Add mesos comment
4770f6e [Aaron Davidson] [SPARK-4370] [Core] Limit number of Netty cores based on executor size
[SPARK-4256] Make Binary Evaluation Metrics functions defined in cases where there ar...

...e 0 positive or 0 negative examples.

Author: Andrew Bullen <andrew.bullen@workday.com>

Closes #3118 from abull/master and squashes the following commits:

c2bf2b1 [Andrew Bullen] [SPARK-4256] Update Code formatting for BinaryClassificationMetricsSpec
36b0533 [Andrew Bullen] [SYMAN-4256] Extract BinaryClassificationMetricsSuite assertions into private method
4d2f79a [Andrew Bullen] [SPARK-4256] Refactor classification metrics tests - extract comparison functions in test
f411e70 [Andrew Bullen] [SPARK-4256] Define precision as 1.0 when there are no positive examples; update code formatting per pull request comments
d9a09ef [Andrew Bullen] Make Binary Evaluation Metrics functions defined in cases where there are 0 positive or 0 negative examples.
[SPARK-4348] [PySpark] [MLlib] rename random.py to rand.py

This PR rename random.py to rand.py to avoid the side affects of conflict with random module, but still keep the same interface as before.

```
>>> from pyspark.mllib.random import RandomRDDs
```

```
$ pydoc pyspark.mllib.random
Help on module random in pyspark.mllib:
NAME
    random - Python package for random data generation.

FILE
    /Users/davies/work/spark/python/pyspark/mllib/rand.py

CLASSES
    __builtin__.object
        pyspark.mllib.random.RandomRDDs

    class RandomRDDs(__builtin__.object)
     |  Generator methods for creating RDDs comprised of i.i.d samples from
     |  some distribution.
     |
     |  Static methods defined here:
     |
     |  normalRDD(sc, size, numPartitions=None, seed=None)
```

cc mengxr

reference link: http://xion.org.pl/2012/05/06/hacking-python-imports/

Author: Davies Liu <davies@databricks.com>

Closes #3216 from davies/random and squashes the following commits:

7ac4e8b [Davies Liu] rename random.py to rand.py
[SPARK-4378][MLLIB] make ALS more Java-friendly

Add Java-friendly version of `run` and `predict`, and use bulk prediction in Java unit tests. The user guide update will come later (though we may not save many lines of code there). srowen

Author: Xiangrui Meng <meng@databricks.com>

Closes #3240 from mengxr/SPARK-4378 and squashes the following commits:

6581503 [Xiangrui Meng] check number of predictions
6c8bbd1 [Xiangrui Meng] make ALS more Java-friendly
[HOT FIX] make-distribution.sh fails if Yarn shuffle jar DNE

This is introduced in #3147 and is failing builds without the `-Pyarn` profile.

Author: Andrew Or <andrew@databricks.com>

Closes #3250 from andrewor14/fix-yarn-shuffle-build and squashes the following commits:

42b3d37 [Andrew Or] Do not fail fast if Yarn shuffle jar does not exist
[SPARK-4326] fix unidoc

There are two issues:

1. specifying guava 11.0.2 will cause hashInt not found in unidoc (any reason to force the version here?)
2. unidoc doesn't recognize static class defined in a base class

aarondav srowen vanzin

Author: Xiangrui Meng <meng@databricks.com>

Closes #3253 from mengxr/SPARK-4326 and squashes the following commits:

53967bf [Xiangrui Meng] fix unidoc
[SPARK-4372][MLLIB] Make LR and SVM's default parameters consistent in Scala and Python

The current default regParam is 1.0 and regType is claimed to be none in Python (but actually it is l2), while regParam = 0.0 and regType is L2 in Scala. We should make the default values consistent. This PR sets the default regType to L2 and regParam to 0.01. Note that the default regParam value in LIBLINEAR (and hence scikit-learn) is 1.0. However, we use average loss instead of total loss in our formulation. Hence regParam=1.0 is definitely too heavy.

In LinearRegression, we set regParam=0.0 and regType=None, because we have separate classes for Lasso and Ridge, both of which use regParam=0.01 as the default.

davies atalwalkar

Author: Xiangrui Meng <meng@databricks.com>

Closes #3232 from mengxr/SPARK-4372 and squashes the following commits:

9979837 [Xiangrui Meng] update Ridge/Lasso to use default regParam 0.01 cast input arguments
d3ba096 [Xiangrui Meng] change 'none' back to None
1909a6e [Xiangrui Meng] change default regParam to 0.01 and regType to L2 in LR and SVM
[SPARK-4310][WebUI] Sort 'Submitted' column in Stage page by time

Author: zsxwing <zsxwing@gmail.com>

Closes #3179 from zsxwing/SPARK-4310 and squashes the following commits:

b0d29f5 [zsxwing] Sort 'Submitted' column in Stage page by time
[SPARK-3722][Docs]minor improvement and fix in docs

https://issues.apache.org/jira/browse/SPARK-3722

Author: WangTao <barneystinson@aliyun.com>

Closes #2579 from WangTaoTheTonic/docsWork and squashes the following commits:

6f91cec [WangTao] use more wording express
29d22fa [WangTao] delete the specified version link
34cb4ea [WangTao] Update running-on-yarn.md
4ee1a26 [WangTao] minor improvement and fix in docs
[SPARK-4394][SQL] Data Sources API Improvements

This PR adds two features to the data sources API:
 - Support for pushing down `IN` filters
 - The ability for relations to optionally provide information about their `sizeInBytes`.

Author: Michael Armbrust <michael@databricks.com>

Closes #3260 from marmbrus/sourcesImprovements and squashes the following commits:

9a5e171 [Michael Armbrust] Use method instead of configuration directly
99c0e6b [Michael Armbrust] Add support for sizeInBytes.
416f167 [Michael Armbrust] Support for IN in data sources API.
2a04ab3 [Michael Armbrust] Simplify implementation of InSet.
[SPARK-4398][PySpark] specialize sc.parallelize(xrange)

`sc.parallelize(range(1 << 20), 1).count()` may take 15 seconds to finish and the rdd object stores the entire list, making task size very large. This PR adds a specialized version for xrange.

JoshRosen davies

Author: Xiangrui Meng <meng@databricks.com>

Closes #3264 from mengxr/SPARK-4398 and squashes the following commits:

8953c41 [Xiangrui Meng] follow davies' suggestion
cbd58e3 [Xiangrui Meng] specialize sc.parallelize(xrange)
[Spark Core] SPARK-4380 Edit spilling log from MB to B

https://issues.apache.org/jira/browse/SPARK-4380

Author: Hong Shen <hongshen@tencent.com>

Closes #3243 from shenh062326/spark_change and squashes the following commits:

4653378 [Hong Shen] Edit spilling log from MB to B
21ee960 [Hong Shen] Edit spilling log from MB to B
e9145e8 [Hong Shen] Edit spilling log from MB to B
da761c2 [Hong Shen] Edit spilling log from MB to B
946351c [Hong Shen] Edit spilling log from MB to B
SPARK-3663 Document SPARK_LOG_DIR and SPARK_PID_DIR

These descriptions are from the header of spark-daemon.sh

Author: Andrew Ash <andrew@andrewash.com>

Closes #2518 from ash211/SPARK-3663 and squashes the following commits:

058b257 [Andrew Ash] Complete hanging clause in SPARK_PID_DIR description
a17cb4b [Andrew Ash] Update docs for default locations per SPARK-4110
af89096 [Andrew Ash] SPARK-3663 Document SPARK_LOG_DIR and SPARK_PID_DIR
[SPARK-4313][WebUI][Yarn] Fix link issue of the executor thread dump page in yarn-cluster mode

In yarn-cluster mode, the Web UI is running behind a yarn proxy server. Some features(or bugs?) of yarn proxy server will break the links for thread dump.

1. Yarn proxy server will do http redirect internally, so if opening `http://example.com:8088/cluster/app/application_1415344371838_0012/executors`, it will fetch `http://example.com:8088/cluster/app/application_1415344371838_0012/executors/` and return the content but won't change the link in the browser. Then when a user clicks `Thread Dump`, it will jump to `http://example.com:8088/proxy/application_1415344371838_0012/threadDump/?executorId=2`. This is a wrong link. The correct link should be `http://example.com:8088/proxy/application_1415344371838_0012/executors/threadDump/?executorId=2`.

Adding "/" to the tab links will fix it.

2. Yarn proxy server has a bug about the URL encode/decode. When a user accesses `http://example.com:8088/proxy/application_1415344371838_0006/executors/threadDump/?executorId=%3Cdriver%3E`, the yarn proxy server will require `http://example.com:36429/executors/threadDump/?executorId=%25253Cdriver%25253E`. But Spark web server expects `http://example.com:36429/executors/threadDump/?executorId=%3Cdriver%3E`. Related to [YARN-2844](https://issues.apache.org/jira/browse/YARN-2844).

For now, it's a tricky approach to bypass the yarn bug.

![threaddump](https://cloud.githubusercontent.com/assets/1000778/4972567/d1ccba64-68ad-11e4-983e-257530cef35a.png)

Author: zsxwing <zsxwing@gmail.com>

Closes #3183 from zsxwing/SPARK-4313 and squashes the following commits:

3379ca8 [zsxwing] Encode the executor id in the thread dump link and update the comment
abfa063 [zsxwing] Fix link issue of the executor thread dump page in yarn-cluster mode
Update failed assert text to match code in SizeEstimatorSuite

Author: Jeff Hammerbacher <jeff.hammerbacher@gmail.com>

Closes #3242 from hammer/patch-1 and squashes the following commits:

f88d635 [Jeff Hammerbacher] Update failed assert text to match code in SizeEstimatorSuite
[SPARK-4239] [SQL] support view in HiveQl

Currently still not support view like

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

because the text in metastore for this view is like

select \`_c0\` as \`valoo\` from (select upper(\`src\`.\`value\`) from \`default\`.\`src\` where ...) \`view3\`

while catalyst cannot resolve \`_c0\` for this query.
For view without colname definition in parentheses, it works fine.

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

Closes #3131 from adrian-wang/view and squashes the following commits:

8a56fd6 [Daoyuan Wang] michael's comments
e46c056 [Daoyuan Wang] add some golden file
079290a [Daoyuan Wang] remove useless import
88afcad [Daoyuan Wang] support view in HiveQl
[SPARK-4245][SQL] Fix containsNull of the result ArrayType of CreateArray expression.

The `containsNull` of the result `ArrayType` of `CreateArray` should be `true` only if the children is empty or there exists nullable child.

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

Closes #3110 from ueshin/issues/SPARK-4245 and squashes the following commits:

6f64746 [Takuya UESHIN] Move equalsIgnoreNullability method into DataType.
5a90e02 [Takuya UESHIN] Refine InsertIntoHiveType and add some comments.
cbecba8 [Takuya UESHIN] Fix a test title.
884ec37 [Takuya UESHIN] Merge branch 'master' into issues/SPARK-4245
3c5274b [Takuya UESHIN] Add tests to insert data of types ArrayType / MapType / StructType with nullability is false into Hive table.
41a94a9 [Takuya UESHIN] Replace InsertIntoTable with InsertIntoHiveTable if data types ignoring nullability are same.
43e6ef5 [Takuya UESHIN] Fix containsNull for empty array.
778e997 [Takuya UESHIN] Fix containsNull of the result ArrayType of CreateArray expression.
SPARK-4375. no longer require -Pscala-2.10

It seems like the winds might have moved away from this approach, but wanted to post the PR anyway because I got it working and to show what it would look like.

Author: Sandy Ryza <sandy@cloudera.com>

Closes #3239 from sryza/sandy-spark-4375 and squashes the following commits:

0ffbe95 [Sandy Ryza] Enable -Dscala-2.11 in sbt
cd42d94 [Sandy Ryza] Update doc
f6644c3 [Sandy Ryza] SPARK-4375 take 2
[SPARK-4333][SQL]  Correctly log number of iterations in RuleExecutor

When iterator of RuleExecutor breaks, the num of iterator should be (iteration - 1) not (iteration ).Because log looks like "Fixed point reached for batch ${batch.name} after 3 iterations.", but it did 2 iterations really!

Author: DoingDone9 <799203320@qq.com>

Closes #3180 from DoingDone9/issue_01 and squashes the following commits:

571e2ed [DoingDone9] Update RuleExecutor.scala
46514b6 [DoingDone9] When iterator of RuleExecutor breaks, the num of iterator should be iteration - 1 not iteration.