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EOFError

ConnectionResetError: [Errno 54] Connection reset by peer

(Please fill in changes proposed in this fix)

/pyspark.zip/pyspark/worker.py", line 255, in main
    if read_int(infile) == SpecialLengths.END_OF_STREAM:
  File "/Users/songhao/apps/spark-2.3.1-bin-hadoop2.7/python/lib/pyspark.zip/pyspark/serializers.py", line 683, in read_int
    length = stream.read(4)
ConnectionResetError: [Errno 54] Connection reset by peerenter code here

markdown20180725153615

andrusha and others added 30 commits February 26, 2018 10:29
For some JVM options, like `-XX:+UnlockExperimentalVMOptions` ordering is necessary.

## What changes were proposed in this pull request?

Keep original `extraJavaOptions` ordering, when passing them through environment variables inside the Docker container.

## How was this patch tested?

Ran base branch a couple of times and checked startup command in logs. Ordering differed every time. Added sorting, ordering was consistent to what user had in `extraJavaOptions`.

Author: Andrew Korzhuev <[email protected]>

Closes #20628 from andrusha/patch-2.

(cherry picked from commit 185f5bc)
Signed-off-by: Marcelo Vanzin <[email protected]>
…cutors.

The ExecutorAllocationManager should not adjust the target number of
executors when killing idle executors, as it has already adjusted the
target number down based on the task backlog.

The name `replace` was misleading with DynamicAllocation on, as the target number
of executors is changed outside of the call to `killExecutors`, so I adjusted that name.  Also separated out the logic of `countFailures` as you don't always want that tied to `replace`.

While I was there I made two changes that weren't directly related to this:
1) Fixed `countFailures` in a couple cases where it was getting an incorrect value since it used to be tied to `replace`, eg. when killing executors on a blacklisted node.
2) hard error if you call `sc.killExecutors` with dynamic allocation on, since that's another way the ExecutorAllocationManager and the CoarseGrainedSchedulerBackend would get out of sync.

Added a unit test case which verifies that the calls to ExecutorAllocationClient do not adjust the number of executors.

Author: Imran Rashid <[email protected]>

Closes #20604 from squito/SPARK-23365.

(cherry picked from commit ecb8b38)
Signed-off-by: Marcelo Vanzin <[email protected]>
## What changes were proposed in this pull request?

Clarify JSON and CSV reader behavior in document.

JSON doesn't support partial results for corrupted records.
CSV only supports partial results for the records with more or less tokens.

## How was this patch tested?

Pass existing tests.

Author: Liang-Chi Hsieh <[email protected]>

Closes #20666 from viirya/SPARK-23448-2.

(cherry picked from commit b14993e)
Signed-off-by: hyukjinkwon <[email protected]>
…use oom

… cause oom

## What changes were proposed in this pull request?
blockManagerIdCache in BlockManagerId will not remove old values which may cause oom

`val blockManagerIdCache = new ConcurrentHashMap[BlockManagerId, BlockManagerId]()`
Since whenever we apply a new BlockManagerId, it will put into this map.

This patch will use guava cahce for  blockManagerIdCache instead.

A heap dump show in [SPARK-23508](https://issues.apache.org/jira/browse/SPARK-23508)

## How was this patch tested?
Exist tests.

Author: zhoukang <[email protected]>

Closes #20667 from caneGuy/zhoukang/fix-history.

(cherry picked from commit 6a8abe2)
Signed-off-by: Wenchen Fan <[email protected]>
…the trace from Java side by Py4JJavaError

## What changes were proposed in this pull request?

This PR proposes for `pyspark.util._exception_message` to produce the trace from Java side by `Py4JJavaError`.

Currently, in Python 2, it uses `message` attribute which `Py4JJavaError` didn't happen to have:

```python
>>> from pyspark.util import _exception_message
>>> try:
...     sc._jvm.java.lang.String(None)
... except Exception as e:
...     pass
...
>>> e.message
''
```

Seems we should use `str` instead for now:

 https://github.com/bartdag/py4j/blob/aa6c53b59027925a426eb09b58c453de02c21b7c/py4j-python/src/py4j/protocol.py#L412

but this doesn't address the problem with non-ascii string from Java side -
 `https://github.com/bartdag/py4j/issues/306`

So, we could directly call `__str__()`:

```python
>>> e.__str__()
u'An error occurred while calling None.java.lang.String.\n: java.lang.NullPointerException\n\tat java.lang.String.<init>(String.java:588)\n\tat sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)\n\tat sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)\n\tat sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)\n\tat java.lang.reflect.Constructor.newInstance(Constructor.java:422)\n\tat py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:247)\n\tat py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)\n\tat py4j.Gateway.invoke(Gateway.java:238)\n\tat py4j.commands.ConstructorCommand.invokeConstructor(ConstructorCommand.java:80)\n\tat py4j.commands.ConstructorCommand.execute(ConstructorCommand.java:69)\n\tat py4j.GatewayConnection.run(GatewayConnection.java:214)\n\tat java.lang.Thread.run(Thread.java:745)\n'
```

which doesn't type coerce unicodes to `str` in Python 2.

This can be actually a problem:

```python
from pyspark.sql.functions import udf
spark.conf.set("spark.sql.execution.arrow.enabled", True)
spark.range(1).select(udf(lambda x: [[]])()).toPandas()
```

**Before**

```
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/.../spark/python/pyspark/sql/dataframe.py", line 2009, in toPandas
    raise RuntimeError("%s\n%s" % (_exception_message(e), msg))
RuntimeError:
Note: toPandas attempted Arrow optimization because 'spark.sql.execution.arrow.enabled' is set to true. Please set it to false to disable this.
```

**After**

```
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/.../spark/python/pyspark/sql/dataframe.py", line 2009, in toPandas
    raise RuntimeError("%s\n%s" % (_exception_message(e), msg))
RuntimeError: An error occurred while calling o47.collectAsArrowToPython.
: org.apache.spark.SparkException: Job aborted due to stage failure: Task 7 in stage 0.0 failed 1 times, most recent failure: Lost task 7.0 in stage 0.0 (TID 7, localhost, executor driver): org.apache.spark.api.python.PythonException: Traceback (most recent call last):
  File "/.../spark/python/pyspark/worker.py", line 245, in main
    process()
  File "/.../spark/python/pyspark/worker.py", line 240, in process
...
Note: toPandas attempted Arrow optimization because 'spark.sql.execution.arrow.enabled' is set to true. Please set it to false to disable this.
```

## How was this patch tested?

Manually tested and unit tests were added.

Author: hyukjinkwon <[email protected]>

Closes #20680 from HyukjinKwon/SPARK-23517.

(cherry picked from commit fab563b)
Signed-off-by: hyukjinkwon <[email protected]>
…y from `orc-mapreduce`

## What changes were proposed in this pull request?

This PR aims to prevent `orc-mapreduce` dependency from making IDEs and maven confused.

**BEFORE**
Please note that `2.6.4` at `Spark Project SQL`.
```
$ mvn dependency:tree -Phadoop-2.7 -Dincludes=org.apache.hadoop:hadoop-mapreduce-client-core
...
[INFO] ------------------------------------------------------------------------
[INFO] Building Spark Project Catalyst 2.4.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:3.0.2:tree (default-cli)  spark-catalyst_2.11 ---
[INFO] org.apache.spark:spark-catalyst_2.11:jar:2.4.0-SNAPSHOT
[INFO] \- org.apache.spark:spark-core_2.11:jar:2.4.0-SNAPSHOT:compile
[INFO]    \- org.apache.hadoop:hadoop-client:jar:2.7.3:compile
[INFO]       \- org.apache.hadoop:hadoop-mapreduce-client-core:jar:2.7.3:compile
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Spark Project SQL 2.4.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:3.0.2:tree (default-cli)  spark-sql_2.11 ---
[INFO] org.apache.spark:spark-sql_2.11:jar:2.4.0-SNAPSHOT
[INFO] \- org.apache.orc:orc-mapreduce:jar:nohive:1.4.3:compile
[INFO]    \- org.apache.hadoop:hadoop-mapreduce-client-core:jar:2.6.4:compile
```

**AFTER**
```
$ mvn dependency:tree -Phadoop-2.7 -Dincludes=org.apache.hadoop:hadoop-mapreduce-client-core
...
[INFO] ------------------------------------------------------------------------
[INFO] Building Spark Project Catalyst 2.4.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:3.0.2:tree (default-cli)  spark-catalyst_2.11 ---
[INFO] org.apache.spark:spark-catalyst_2.11:jar:2.4.0-SNAPSHOT
[INFO] \- org.apache.spark:spark-core_2.11:jar:2.4.0-SNAPSHOT:compile
[INFO]    \- org.apache.hadoop:hadoop-client:jar:2.7.3:compile
[INFO]       \- org.apache.hadoop:hadoop-mapreduce-client-core:jar:2.7.3:compile
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Spark Project SQL 2.4.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:3.0.2:tree (default-cli)  spark-sql_2.11 ---
[INFO] org.apache.spark:spark-sql_2.11:jar:2.4.0-SNAPSHOT
[INFO] \- org.apache.spark:spark-core_2.11:jar:2.4.0-SNAPSHOT:compile
[INFO]    \- org.apache.hadoop:hadoop-client:jar:2.7.3:compile
[INFO]       \- org.apache.hadoop:hadoop-mapreduce-client-core:jar:2.7.3:compile
```

## How was this patch tested?

1. Pass the Jenkins with `dev/test-dependencies.sh` with the existing dependencies.
2. Manually do the following and see the change.
```
mvn dependency:tree -Phadoop-2.7 -Dincludes=org.apache.hadoop:hadoop-mapreduce-client-core
```

Author: Dongjoon Hyun <[email protected]>

Closes #20704 from dongjoon-hyun/SPARK-23551.

(cherry picked from commit 34811e0)
Signed-off-by: Marcelo Vanzin <[email protected]>
…to H

## What changes were proposed in this pull request?

Adds structured streaming tests using testTransformer for these suites:
* BinarizerSuite
* BucketedRandomProjectionLSHSuite
* BucketizerSuite
* ChiSqSelectorSuite
* CountVectorizerSuite
* DCTSuite.scala
* ElementwiseProductSuite
* FeatureHasherSuite
* HashingTFSuite

## How was this patch tested?

It tests itself because it is a bunch of tests!

Author: Joseph K. Bradley <[email protected]>

Closes #20111 from jkbradley/SPARK-22883-streaming-featureAM.

(cherry picked from commit 119f6a0)
Signed-off-by: Joseph K. Bradley <[email protected]>
## What changes were proposed in this pull request?

Fix doc link that was changed in 2.3

shivaram

Author: Felix Cheung <[email protected]>

Closes #20711 from felixcheung/rvigmean.

(cherry picked from commit 0b6cead)
Signed-off-by: Felix Cheung <[email protected]>
## What changes were proposed in this pull request?
Add Spark 2.3.0 in HiveExternalCatalogVersionsSuite since Spark 2.3.0 is released for ensuring backward compatibility.

## How was this patch tested?
N/A

Author: gatorsmile <[email protected]>

Closes #20720 from gatorsmile/add2.3.

(cherry picked from commit 487377e)
Signed-off-by: gatorsmile <[email protected]>
## What changes were proposed in this pull request?

It looks like this was incorrectly copied from `XPathFloat` in the class above.

## How was this patch tested?

(Please explain how this patch was tested. E.g. unit tests, integration tests, manual tests)
(If this patch involves UI changes, please attach a screenshot; otherwise, remove this)

Please review http://spark.apache.org/contributing.html before opening a pull request.

Author: Eric Liang <[email protected]>

Closes #20730 from ericl/fix-typo-xpath.

(cherry picked from commit a89cdf5)
Signed-off-by: hyukjinkwon <[email protected]>
…e-annotated functions

## What changes were proposed in this pull request?

Check python version to determine whether to use `inspect.getargspec` or `inspect.getfullargspec` before applying `pandas_udf` core logic to a function. The former is python2.7 (deprecated in python3) and the latter is python3.x. The latter correctly accounts for type annotations, which are syntax errors in python2.x.

## How was this patch tested?

Locally, on python 2.7 and 3.6.

Author: Michael (Stu) Stewart <[email protected]>

Closes #20728 from mstewart141/pandas_udf_fix.

(cherry picked from commit 7965c91)
Signed-off-by: hyukjinkwon <[email protected]>
## What changes were proposed in this pull request?

This PR fixes a broken link as below:

**Before:**

<img width="678" alt="2018-03-05 12 23 58" src="https://user-images.githubusercontent.com/6477701/36957930-6d00ebda-207b-11e8-9ae4-718561b0428c.png">

**After:**

<img width="680" alt="2018-03-05 12 23 20" src="https://user-images.githubusercontent.com/6477701/36957934-6f834ac4-207b-11e8-97b4-18832b2b80cd.png">

Also see https://spark.apache.org/docs/2.3.0/sql-programming-guide.html#compatibility-with-apache-hive

## How was this patch tested?

Manually tested. I checked the same instances in `docs` directory. Seems this is the only one.

Author: hyukjinkwon <[email protected]>

Closes #20733 from HyukjinKwon/minor-link.

(cherry picked from commit 269cd53)
Signed-off-by: gatorsmile <[email protected]>
## What changes were proposed in this pull request?

Provide more details in trigonometric function documentations. Referenced `java.lang.Math` for further details in the descriptions.
## How was this patch tested?

Ran full build, checked generated documentation manually

Author: Mihaly Toth <[email protected]>

Closes #20618 from misutoth/trigonometric-doc.

(cherry picked from commit a366b95)
Signed-off-by: hyukjinkwon <[email protected]>
…ication

## What changes were proposed in this pull request?

adding Structured Streaming tests for all Models/Transformers in spark.ml.classification

## How was this patch tested?

N/A

Author: WeichenXu <[email protected]>

Closes #20121 from WeichenXu123/ml_stream_test_classification.

(cherry picked from commit 98a5c0a)
Signed-off-by: Joseph K. Bradley <[email protected]>
…st in ParquetFileFormat

## What changes were proposed in this pull request?

ParquetFileFormat leaks opened files in some cases. This PR prevents that by registering task completion listers first before initialization.

- [spark-branch-2.3-test-sbt-hadoop-2.7](https://amplab.cs.berkeley.edu/jenkins/view/Spark%20QA%20Test%20(Dashboard)/job/spark-branch-2.3-test-sbt-hadoop-2.7/205/testReport/org.apache.spark.sql/FileBasedDataSourceSuite/_It_is_not_a_test_it_is_a_sbt_testing_SuiteSelector_/)
- [spark-master-test-sbt-hadoop-2.6](https://amplab.cs.berkeley.edu/jenkins/view/Spark%20QA%20Test%20(Dashboard)/job/spark-master-test-sbt-hadoop-2.6/4228/testReport/junit/org.apache.spark.sql.execution.datasources.parquet/ParquetQuerySuite/_It_is_not_a_test_it_is_a_sbt_testing_SuiteSelector_/)

```
Caused by: sbt.ForkMain$ForkError: java.lang.Throwable: null
	at org.apache.spark.DebugFilesystem$.addOpenStream(DebugFilesystem.scala:36)
	at org.apache.spark.DebugFilesystem.open(DebugFilesystem.scala:70)
	at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:769)
	at org.apache.parquet.hadoop.ParquetFileReader.<init>(ParquetFileReader.java:538)
	at org.apache.spark.sql.execution.datasources.parquet.SpecificParquetRecordReaderBase.initialize(SpecificParquetRecordReaderBase.java:149)
	at org.apache.spark.sql.execution.datasources.parquet.VectorizedParquetRecordReader.initialize(VectorizedParquetRecordReader.java:133)
	at org.apache.spark.sql.execution.datasources.parquet.ParquetFileFormat$$anonfun$buildReaderWithPartitionValues$1.apply(ParquetFileFormat.scala:400)
	at
```

## How was this patch tested?

Manual. The following test case generates the same leakage.

```scala
  test("SPARK-23457 Register task completion listeners first in ParquetFileFormat") {
    withSQLConf(SQLConf.PARQUET_VECTORIZED_READER_BATCH_SIZE.key -> s"${Int.MaxValue}") {
      withTempDir { dir =>
        val basePath = dir.getCanonicalPath
        Seq(0).toDF("a").write.format("parquet").save(new Path(basePath, "first").toString)
        Seq(1).toDF("a").write.format("parquet").save(new Path(basePath, "second").toString)
        val df = spark.read.parquet(
          new Path(basePath, "first").toString,
          new Path(basePath, "second").toString)
        val e = intercept[SparkException] {
          df.collect()
        }
        assert(e.getCause.isInstanceOf[OutOfMemoryError])
      }
    }
  }
```

Author: Dongjoon Hyun <[email protected]>

Closes #20714 from dongjoon-hyun/SPARK-23457-2.3.
…ory` for a HDFS file path

## What changes were proposed in this pull request?

In a kerberized cluster, when Spark reads a file path (e.g. `people.json`), it warns with a wrong warning message during looking up `people.json/_spark_metadata`. The root cause of this situation is the difference between `LocalFileSystem` and `DistributedFileSystem`. `LocalFileSystem.exists()` returns `false`, but `DistributedFileSystem.exists` raises `org.apache.hadoop.security.AccessControlException`.

```scala
scala> spark.read.json("file:///usr/hdp/current/spark-client/examples/src/main/resources/people.json").show
+----+-------+
| age|   name|
+----+-------+
|null|Michael|
|  30|   Andy|
|  19| Justin|
+----+-------+

scala> spark.read.json("hdfs:///tmp/people.json")
18/02/15 05:00:48 WARN streaming.FileStreamSink: Error while looking for metadata directory.
18/02/15 05:00:48 WARN streaming.FileStreamSink: Error while looking for metadata directory.
```

After this PR,
```scala
scala> spark.read.json("hdfs:///tmp/people.json").show
+----+-------+
| age|   name|
+----+-------+
|null|Michael|
|  30|   Andy|
|  19| Justin|
+----+-------+
```

## How was this patch tested?

Manual.

Author: Dongjoon Hyun <[email protected]>

Closes #20713 from dongjoon-hyun/SPARK-23434-2.3.
## What changes were proposed in this pull request?

Remove .md5 files from release artifacts

## How was this patch tested?

N/A

Author: Sean Owen <[email protected]>

Closes #20737 from srowen/SPARK-23601.

(cherry picked from commit 8bceb89)
Signed-off-by: Sean Owen <[email protected]>
…rnal hive table

## What changes were proposed in this pull request?

The following query doesn't work as expected:
```
CREATE EXTERNAL TABLE ext_table(a STRING, b INT, c STRING) PARTITIONED BY (d STRING)
LOCATION 'sql/core/spark-warehouse/ext_table';
ALTER TABLE ext_table CHANGE a a STRING COMMENT "new comment";
DESC ext_table;
```
The comment of column `a` is not updated, that's because `HiveExternalCatalog.doAlterTable` ignores table schema changes. To fix the issue, we should call `doAlterTableDataSchema` instead of `doAlterTable`.

## How was this patch tested?

Updated `DDLSuite.testChangeColumn`.

Author: Xingbo Jiang <[email protected]>

Closes #20696 from jiangxb1987/alterColumnComment.

(cherry picked from commit ac76eff)
Signed-off-by: Wenchen Fan <[email protected]>
…uncher test.

First the bad news: there's an unfixable race in the launcher code.
(By unfixable I mean it would take a lot more effort than this change
to fix it.) The good news is that it should only affect super short
lived applications, such as the one run by the flaky test, so it's
possible to work around it in our test.

The fix also uncovered an issue with the recently added "closeAndWait()"
method; closing the connection would still possibly cause data loss,
so this change waits a while for the connection to finish itself, and
closes the socket if that times out. The existing connection timeout
is reused so that if desired it's possible to control how long to wait.

As part of that I also restored the old behavior that disconnect() would
force a disconnection from the child app; the "wait for data to arrive"
approach is only taken when disposing of the handle.

I tested this by inserting a bunch of sleeps in the test and the socket
handling code in the launcher library; with those I was able to reproduce
the error from the jenkins jobs. With the changes, even with all the
sleeps still in place, all tests pass.

Author: Marcelo Vanzin <[email protected]>

Closes #20743 from vanzin/SPARK-23020.
…uption.

## What changes were proposed in this pull request?

In current code, all local blocks will be checked for corruption no matter it's big or not.  The reasons are as below:

Size in FetchResult for local block is set to be 0 (https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/storage/ShuffleBlockFetcherIterator.scala#L327)
SPARK-4105 meant to only check the small blocks(size<maxBytesInFlight/3), but for reason 1, below check will be invalid. https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/storage/ShuffleBlockFetcherIterator.scala#L420

We can fix this and avoid the OOM.

## How was this patch tested?

UT added

Author: jx158167 <[email protected]>

Closes #20685 from jinxing64/SPARK-23524.

(cherry picked from commit 77c91cc)
Signed-off-by: Wenchen Fan <[email protected]>
…table in CreateTable

Backport #20660 to branch 2.3
=====================================
## What changes were proposed in this pull request?

For CreateTable with Append mode, we should check if `storage.locationUri` is the same with existing table in `PreprocessTableCreation`

In the current code, there is only a simple exception if the `storage.locationUri` is different with existing table:
`org.apache.spark.sql.AnalysisException: Table or view not found:`

which can be improved.

## How was this patch tested?

Unit test

Author: Wang Gengliang <[email protected]>

Closes #20766 from gengliangwang/backport_20660_to_2.3.
This is a backport of #20598.

## What changes were proposed in this pull request?

Solved two bugs to enable stream-stream self joins.

### Incorrect analysis due to missing MultiInstanceRelation trait
Streaming leaf nodes did not extend MultiInstanceRelation, which is necessary for the catalyst analyzer to convert the self-join logical plan DAG into a tree (by creating new instances of the leaf relations). This was causing the error `Failure when resolving conflicting references in Join:` (see JIRA for details).

### Incorrect attribute rewrite when splicing batch plans in MicroBatchExecution
When splicing the source's batch plan into the streaming plan (by replacing the StreamingExecutionPlan), we were rewriting the attribute reference in the streaming plan with the new attribute references from the batch plan. This was incorrectly handling the scenario when multiple StreamingExecutionRelation point to the same source, and therefore eventually point to the same batch plan returned by the source. Here is an example query, and its corresponding plan transformations.
```
val df = input.toDF
val join =
      df.select('value % 5 as "key", 'value).join(
        df.select('value % 5 as "key", 'value), "key")
```
Streaming logical plan before splicing the batch plan
```
Project [key#6, value#1, value#12]
+- Join Inner, (key#6 = key#9)
   :- Project [(value#1 % 5) AS key#6, value#1]
   :  +- StreamingExecutionRelation Memory[#1], value#1
   +- Project [(value#12 % 5) AS key#9, value#12]
      +- StreamingExecutionRelation Memory[#1], value#12  // two different leaves pointing to same source
```
Batch logical plan after splicing the batch plan and before rewriting
```
Project [key#6, value#1, value#12]
+- Join Inner, (key#6 = key#9)
   :- Project [(value#1 % 5) AS key#6, value#1]
   :  +- LocalRelation [value#66]           // replaces StreamingExecutionRelation Memory[#1], value#1
   +- Project [(value#12 % 5) AS key#9, value#12]
      +- LocalRelation [value#66]           // replaces StreamingExecutionRelation Memory[#1], value#12
```
Batch logical plan after rewriting the attributes. Specifically, for spliced, the new output attributes (value#66) replace the earlier output attributes (value#12, and value#1, one for each StreamingExecutionRelation).
```
Project [key#6, value#66, value#66]       // both value#1 and value#12 replaces by value#66
+- Join Inner, (key#6 = key#9)
   :- Project [(value#66 % 5) AS key#6, value#66]
   :  +- LocalRelation [value#66]
   +- Project [(value#66 % 5) AS key#9, value#66]
      +- LocalRelation [value#66]
```
This causes the optimizer to eliminate value#66 from one side of the join.
```
Project [key#6, value#66, value#66]
+- Join Inner, (key#6 = key#9)
   :- Project [(value#66 % 5) AS key#6, value#66]
   :  +- LocalRelation [value#66]
   +- Project [(value#66 % 5) AS key#9]   // this does not generate value, incorrect join results
      +- LocalRelation [value#66]
```

**Solution**: Instead of rewriting attributes, use a Project to introduce aliases between the output attribute references and the new reference generated by the spliced plans. The analyzer and optimizer will take care of the rest.
```
Project [key#6, value#1, value#12]
+- Join Inner, (key#6 = key#9)
   :- Project [(value#1 % 5) AS key#6, value#1]
   :  +- Project [value#66 AS value#1]   // solution: project with aliases
   :     +- LocalRelation [value#66]
   +- Project [(value#12 % 5) AS key#9, value#12]
      +- Project [value#66 AS value#12]    // solution: project with aliases
         +- LocalRelation [value#66]
```

## How was this patch tested?
New unit test

Author: Tathagata Das <[email protected]>

Closes #20765 from tdas/SPARK-23406-2.3.
…an be casted to Date

This PR is to backport #20621 to branch 2.3�

---
## What changes were proposed in this pull request?

Before the patch, Spark could infer as Date a partition value which cannot be casted to Date (this can happen when there are extra characters after a valid date, like `2018-02-15AAA`).

When this happens and the input format has metadata which define the schema of the table, then `null` is returned as a value for the partition column, because the `cast` operator used in (`PartitioningAwareFileIndex.inferPartitioning`) is unable to convert the value.

The PR checks in the partition inference that values can be casted to Date and Timestamp, in order to infer that datatype to them.

## How was this patch tested?

added UT

Author: Marco Gaido <[email protected]>

Closes #20764 from gatorsmile/backport23436.
…ffect.

This change restores functionality that was inadvertently removed as part
of the fix for SPARK-22372.

Also modified an existing unit test to make sure the feature works as intended.

Author: Marcelo Vanzin <[email protected]>

Closes #20776 from vanzin/SPARK-23630.

(cherry picked from commit 2c36736)
Signed-off-by: Marcelo Vanzin <[email protected]>
…rn 1 + num of expressions

## What changes were proposed in this pull request?

Backport of ea48099 to branch 2.3.

## How was this patch tested?

added UT

cc cloud-fan hvanhovell

Author: Marco Gaido <[email protected]>

Closes #20783 from mgaido91/SPARK-23628_2.3.
…data from JSON

## What changes were proposed in this pull request?

The from_json() function accepts an additional parameter, where the user might specify the schema. The issue is that the specified schema might not be compatible with data. In particular, the JSON data might be missing data for fields declared as non-nullable in the schema. The from_json() function does not verify the data against such errors. When data with missing fields is sent to the parquet encoder, there is no verification either. The end results is a corrupt parquet file.

To avoid corruptions, make sure that all fields in the user-specified schema are set to be nullable.
Since this changes the behavior of a public function, we need to include it in release notes.
The behavior can be reverted by setting `spark.sql.fromJsonForceNullableSchema=false`

## How was this patch tested?

Added two new tests.

Author: Michał Świtakowski <[email protected]>

Closes #20694 from mswit-databricks/SPARK-23173.

(cherry picked from commit 2ca9bb0)
Signed-off-by: gatorsmile <[email protected]>
## What changes were proposed in this pull request?

Revise doc of method pushFilters in SupportsPushDownFilters/SupportsPushDownCatalystFilters

In `FileSourceStrategy`, except `partitionKeyFilters`(the references of which is subset of partition keys), all filters needs to be evaluated after scanning. Otherwise, Spark will get wrong result from data sources like Orc/Parquet.

This PR is to improve the doc.

Author: Wang Gengliang <[email protected]>

Closes #20769 from gengliangwang/revise_pushdown_doc.

(cherry picked from commit 10b0657)
Signed-off-by: gatorsmile <[email protected]>
Signed-off-by: DylanGuedes <djmgguedesgmail.com>

## What changes were proposed in this pull request?

Changes variable name conflict: [input is a built-in python function](https://stackoverflow.com/questions/20670732/is-input-a-keyword-in-python).

## How was this patch tested?

I runned the example and it works fine.

Author: DylanGuedes <[email protected]>

Closes #20775 from DylanGuedes/input_variable.

(cherry picked from commit b6f837c)
Signed-off-by: hyukjinkwon <[email protected]>
## What changes were proposed in this pull request?

The error message ```s"""Field "$name" does not exist."""``` is thrown when looking up an unknown field in StructType. In the error message, we should also contain the information about which columns/fields exist in this struct.

## How was this patch tested?

Added new unit tests.

Note: I created a new `StructTypeSuite.scala` as I couldn't find an existing suite that's suitable to place these tests. I may be missing something so feel free to propose new locations.

Please review http://spark.apache.org/contributing.html before opening a pull request.

Author: Xiayun Sun <[email protected]>

Closes #20649 from xysun/SPARK-23462.

(cherry picked from commit b304e07)
Signed-off-by: hyukjinkwon <[email protected]>
…he rule OptimizeMetadataOnlyQuery

This PR is to backport #20684 and #20693 to Spark 2.3 branch

---

## What changes were proposed in this pull request?
```Scala
val tablePath = new File(s"${path.getCanonicalPath}/cOl3=c/cOl1=a/cOl5=e")
 Seq(("a", "b", "c", "d", "e")).toDF("cOl1", "cOl2", "cOl3", "cOl4", "cOl5")
 .write.json(tablePath.getCanonicalPath)
 val df = spark.read.json(path.getCanonicalPath).select("CoL1", "CoL5", "CoL3").distinct()
 df.show()
```

It generates a wrong result.
```
[c,e,a]
```

We have a bug in the rule `OptimizeMetadataOnlyQuery `. We should respect the attribute order in the original leaf node. This PR is to fix it.

## How was this patch tested?
Added a test case

Author: Xingbo Jiang <[email protected]>
Author: gatorsmile <[email protected]>

Closes #20763 from gatorsmile/backport23523.
jiangxb1987 and others added 17 commits July 30, 2018 09:58
…hedulerImplSuite

## What changes were proposed in this pull request?

In the `afterEach()` method of both `TastSetManagerSuite` and `TaskSchedulerImplSuite`, `super.afterEach()` shall be called at the end, because it shall stop the SparkContext.

https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/93706/testReport/org.apache.spark.scheduler/TaskSchedulerImplSuite/_It_is_not_a_test_it_is_a_sbt_testing_SuiteSelector_/
The test failure is caused by the above reason, the newly added `barrierCoordinator` required `rpcEnv` which has been stopped before `TaskSchedulerImpl` doing cleanup.

## How was this patch tested?
Existing tests.

Author: Xingbo Jiang <[email protected]>

Closes #21908 from jiangxb1987/afterEach.

(cherry picked from commit 3695ba5)
Signed-off-by: hyukjinkwon <[email protected]>
…r bounds for in-memory partition pruning

## What changes were proposed in this pull request?

Looks we intentionally set `null` for upper/lower bounds for complex types and don't use it. However, these look used in in-memory partition pruning, which ends up with incorrect results.

This PR proposes to explicitly whitelist the supported types.

```scala
val df = Seq(Array("a", "b"), Array("c", "d")).toDF("arrayCol")
df.cache().filter("arrayCol > array('a', 'b')").show()
```

```scala
val df = sql("select cast('a' as binary) as a")
df.cache().filter("a == cast('a' as binary)").show()
```

**Before:**

```
+--------+
|arrayCol|
+--------+
+--------+
```

```
+---+
|  a|
+---+
+---+
```

**After:**

```
+--------+
|arrayCol|
+--------+
|  [c, d]|
+--------+
```

```
+----+
|   a|
+----+
|[61]|
+----+
```

## How was this patch tested?

Unit tests were added and manually tested.

Author: hyukjinkwon <[email protected]>

Closes #21882 from HyukjinKwon/stats-filter.

(cherry picked from commit bfe60fc)
Signed-off-by: Wenchen Fan <[email protected]>
…ns wrong result

## What changes were proposed in this pull request?

When we do an average, the result is computed dividing the sum of the values by their count. In the case the result is a DecimalType, the way we are casting/managing the precision and scale is not really optimized and it is not coherent with what we do normally.

In particular, a problem can happen when the `Divide` operand returns a result which contains a precision and scale different by the ones which are expected as output of the `Divide` operand. In the case reported in the JIRA, for instance, the result of the `Divide` operand is a `Decimal(38, 36)`, while the output data type for `Divide` is 38, 22. This is not an issue when the `Divide` is followed by a `CheckOverflow` or a `Cast` to the right data type, as these operations return a decimal with the defined precision and scale. Despite in the `Average` operator we do have a `Cast`, this may be bypassed if the result of `Divide` is the same type which it is casted to, hence the issue reported in the JIRA may arise.

The PR proposes to use the normal rules/handling of the arithmetic operators with Decimal data type, so we both reuse the existing code (having a single logic for operations between decimals) and we fix this problem as the result is always guarded by `CheckOverflow`.

## How was this patch tested?

added UT

Author: Marco Gaido <[email protected]>

Closes #21910 from mgaido91/SPARK-24957.

(cherry picked from commit 85505fc)
Signed-off-by: Wenchen Fan <[email protected]>
It proposes a version in which nullable expressions are not valid in the limit clause

It was tested with unit and e2e tests.

Please review http://spark.apache.org/contributing.html before opening a pull request.

Author: Mauro Palsgraaf <[email protected]>

Closes #21807 from mauropalsgraaf/SPARK-24536.

(cherry picked from commit 4ac2126)
Signed-off-by: Xiao Li <[email protected]>
…c to PyArrow 0.9.0)

## What changes were proposed in this pull request?

See [ARROW-2432](https://jira.apache.org/jira/browse/ARROW-2432). Seems using `from_pandas` to convert decimals fails if encounters a value of `None`:

```python
import pyarrow as pa
import pandas as pd
from decimal import Decimal

pa.Array.from_pandas(pd.Series([Decimal('3.14'), None]), type=pa.decimal128(3, 2))
```

**Arrow 0.8.0**

```
<pyarrow.lib.Decimal128Array object at 0x10a572c58>
[
  Decimal('3.14'),
  NA
]
```

**Arrow 0.9.0**

```
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "array.pxi", line 383, in pyarrow.lib.Array.from_pandas
  File "array.pxi", line 177, in pyarrow.lib.array
  File "error.pxi", line 77, in pyarrow.lib.check_status
  File "error.pxi", line 77, in pyarrow.lib.check_status
pyarrow.lib.ArrowInvalid: Error converting from Python objects to Decimal: Got Python object of type NoneType but can only handle these types: decimal.Decimal
```

This PR propose to work around this via Decimal NaN:

```python
pa.Array.from_pandas(pd.Series([Decimal('3.14'), Decimal('NaN')]), type=pa.decimal128(3, 2))
```

```
<pyarrow.lib.Decimal128Array object at 0x10ffd2e68>
[
  Decimal('3.14'),
  NA
]
```

## How was this patch tested?

Manually tested:

```bash
SPARK_TESTING=1 ./bin/pyspark pyspark.sql.tests ScalarPandasUDFTests
```

**Before**

```
Traceback (most recent call last):
  File "/.../spark/python/pyspark/sql/tests.py", line 4672, in test_vectorized_udf_null_decimal
    self.assertEquals(df.collect(), res.collect())
  File "/.../spark/python/pyspark/sql/dataframe.py", line 533, in collect
    sock_info = self._jdf.collectToPython()
  File "/.../spark/python/lib/py4j-0.10.7-src.zip/py4j/java_gateway.py", line 1257, in __call__
    answer, self.gateway_client, self.target_id, self.name)
  File "/.../spark/python/pyspark/sql/utils.py", line 63, in deco
    return f(*a, **kw)
  File "/.../spark/python/lib/py4j-0.10.7-src.zip/py4j/protocol.py", line 328, in get_return_value
    format(target_id, ".", name), value)
Py4JJavaError: An error occurred while calling o51.collectToPython.
: org.apache.spark.SparkException: Job aborted due to stage failure: Task 3 in stage 1.0 failed 1 times, most recent failure: Lost task 3.0 in stage 1.0 (TID 7, localhost, executor driver): org.apache.spark.api.python.PythonException: Traceback (most recent call last):
  File "/.../spark/python/pyspark/worker.py", line 320, in main
    process()
  File "/.../spark/python/pyspark/worker.py", line 315, in process
    serializer.dump_stream(func(split_index, iterator), outfile)
  File "/.../spark/python/pyspark/serializers.py", line 274, in dump_stream
    batch = _create_batch(series, self._timezone)
  File "/.../spark/python/pyspark/serializers.py", line 243, in _create_batch
    arrs = [create_array(s, t) for s, t in series]
  File "/.../spark/python/pyspark/serializers.py", line 241, in create_array
    return pa.Array.from_pandas(s, mask=mask, type=t)
  File "array.pxi", line 383, in pyarrow.lib.Array.from_pandas
  File "array.pxi", line 177, in pyarrow.lib.array
  File "error.pxi", line 77, in pyarrow.lib.check_status
  File "error.pxi", line 77, in pyarrow.lib.check_status
ArrowInvalid: Error converting from Python objects to Decimal: Got Python object of type NoneType but can only handle these types: decimal.Decimal
```

**After**

```
Running tests...
----------------------------------------------------------------------
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
.......S.............................
----------------------------------------------------------------------
Ran 37 tests in 21.980s
```

Author: hyukjinkwon <[email protected]>

Closes #21928 from HyukjinKwon/SPARK-24976.

(cherry picked from commit f4772fd)
Signed-off-by: Bryan Cutler <[email protected]>
(cherry picked from commit 15fc237)
…opicPartition

## What changes were proposed in this pull request?

This small fix adds a `consumer.release()` call to `KafkaSourceRDD` in the case where we've retrieved offsets from Kafka, but the `fromOffset` is equal to the `lastOffset`, meaning there is no new data to read for a particular topic partition. Up until now, we'd just return an empty iterator without closing the consumer which would cause a FD leak.

If accepted, this pull request should be merged into master as well.

## How was this patch tested?

Haven't ran any specific tests, would love help on how to test methods running inside `RDD.compute`.

Author: Yuval Itzchakov <[email protected]>

Closes #21997 from YuvalItzchakov/master.

(cherry picked from commit b7fdf8e)
Signed-off-by: cody koeninger <[email protected]>
## What changes were proposed in this pull request?

Update Hadoop 2.7 to 2.7.7 to pull in bug and security fixes.

## How was this patch tested?

Existing tests.

Author: Sean Owen <[email protected]>

Closes #21987 from srowen/SPARK-25015.

(cherry picked from commit 5f9633d)
Signed-off-by: Sean Owen <[email protected]>
… the file system

## What changes were proposed in this pull request?

In `SparkHadoopUtil. checkAccessPermission`,  we consider only basic permissions in order to check whether a user can access a file or not. This is not a complete check, as it ignores ACLs and other policies a file system may apply in its internal. So this can result in returning wrongly that a user cannot access a file (despite he actually can).

The PR proposes to delegate to the filesystem the check whether a file is accessible or not, in order to return the right result. A caching layer is added for performance reasons.

## How was this patch tested?

added UT

Author: Marco Gaido <[email protected]>

Closes #22021 from mgaido91/SPARK-24948_2.3.
Update Jetty to 9.3.24.v20180605 to pick up security fix

Existing tests.

Closes #22055 from srowen/Jetty9324.

Authored-by: Sean Owen <[email protected]>
Signed-off-by: Sean Owen <[email protected]>
(cherry picked from commit eb9a696)
Signed-off-by: Sean Owen <[email protected]>
…rkSession

## What changes were proposed in this pull request?

When a `SparkSession` is stopped, `SQLConf.get` should use the fallback conf to avoid weird issues like
```
sbt.ForkMain$ForkError: java.lang.IllegalStateException: LiveListenerBus is stopped.
	at org.apache.spark.scheduler.LiveListenerBus.addToQueue(LiveListenerBus.scala:97)
	at org.apache.spark.scheduler.LiveListenerBus.addToStatusQueue(LiveListenerBus.scala:80)
	at org.apache.spark.sql.internal.SharedState.<init>(SharedState.scala:93)
	at org.apache.spark.sql.SparkSession$$anonfun$sharedState$1.apply(SparkSession.scala:120)
	at org.apache.spark.sql.SparkSession$$anonfun$sharedState$1.apply(SparkSession.scala:120)
	at scala.Option.getOrElse(Option.scala:121)
...
```

## How was this patch tested?

a new test suite

Closes #22056 from cloud-fan/session.

Authored-by: Wenchen Fan <[email protected]>
Signed-off-by: Xiao Li <[email protected]>
(cherry picked from commit fec67ed)
Signed-off-by: Xiao Li <[email protected]>
…ails w/java 8 181-b13

## What changes were proposed in this pull request?

- Update DateTimeUtilsSuite so that when testing roundtripping in daysToMillis and millisToDays multiple skipdates can be specified.
- Updated test so that both new years eve 2014 and new years day 2015 are skipped for kiribati time zones.  This is necessary as java versions pre 181-b13 considered new years day 2015 to be skipped while susequent versions corrected this to new years eve.

## How was this patch tested?
Unit tests

Author: Chris Martin <[email protected]>

Closes #21901 from d80tb7/SPARK-24950_datetimeUtilsSuite_failures.

(cherry picked from commit c5b8d54)
Signed-off-by: Sean Owen <[email protected]>
…crypto.html

Add ECCN notice required by http://www.apache.org/dev/crypto.html
See https://issues.apache.org/jira/browse/LEGAL-398

This should probably be backported to 2.3, 2.2, as that's when the key dep (commons crypto) turned up. BC is actually unused, but still there.

N/A

Closes #22064 from srowen/ECCN.

Authored-by: Sean Owen <[email protected]>
Signed-off-by: Sean Owen <[email protected]>
(cherry picked from commit 91cdab5)
Signed-off-by: Sean Owen <[email protected]>
…access released memory page

## What changes were proposed in this pull request?

This issue is pretty similar to [SPARK-21907](https://issues.apache.org/jira/browse/SPARK-21907).

"allocateArray" in [ShuffleInMemorySorter.reset](https://github.com/apache/spark/blob/9b8521e53e56a53b44c02366a99f8a8ee1307bbf/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorter.java#L99) may trigger a spill and cause ShuffleInMemorySorter access the released `array`. Another task may get the same memory page from the pool. This will cause two tasks access the same memory page. When a task reads memory written by another task, many types of failures may happen. Here are some examples I  have seen:

- JVM crash. (This is easy to reproduce in a unit test as we fill newly allocated and deallocated memory with 0xa5 and 0x5a bytes which usually points to an invalid memory address)
- java.lang.IllegalArgumentException: Comparison method violates its general contract!
- java.lang.NullPointerException at org.apache.spark.memory.TaskMemoryManager.getPage(TaskMemoryManager.java:384)
- java.lang.UnsupportedOperationException: Cannot grow BufferHolder by size -536870912 because the size after growing exceeds size limitation 2147483632

This PR resets states in `ShuffleInMemorySorter.reset` before calling `allocateArray` to fix the issue.

## How was this patch tested?

The new unit test will make JVM crash without the fix.

Closes #22062 from zsxwing/SPARK-25081.

Authored-by: Shixiong Zhu <[email protected]>
Signed-off-by: Shixiong Zhu <[email protected]>
(cherry picked from commit f5aba65)
Signed-off-by: Shixiong Zhu <[email protected]>
## What changes were proposed in this pull request?

during my travails in porting spark builds to run on our centos worker, i managed to recreate (as best i could) the centos environment on our new ubuntu-testing machine.

while running my initial builds, lintr was crashing on some extraneous spaces in test_basic.R (see:  https://amplab.cs.berkeley.edu/jenkins/job/spark-master-test-sbt-hadoop-2.6-ubuntu-test/862/console)

after removing those spaces, the ubuntu build happily passed the lintr tests.

## How was this patch tested?

i then tested this against a modified spark-master-test-sbt-hadoop-2.6 build (see https://amplab.cs.berkeley.edu/jenkins/view/RISELab%20Infra/job/testing-spark-master-test-with-updated-R-crap/4/), which scp'ed a copy of test_basic.R in to the repo after the git clone.  everything seems to be working happily.

Author: shane knapp <[email protected]>

Closes #21864 from shaneknapp/fixing-R-lint-spacing.

(cherry picked from commit 3efdf35)
Signed-off-by: Sean Owen <[email protected]>
@srowen
Copy link
Member

srowen commented Aug 10, 2018

Close this @lovezeropython

LantaoJin and others added 9 commits August 13, 2018 08:51
…wrap in brackets) may lead to codegen issue

## What changes were proposed in this pull request?

Backport #22066 to branch-2.3

Use different API in 2.3 here
```scala
|${ctx.JAVA_INT} $childResult = 0;
```

"distribute by" on multiple columns (wrap in brackets) may lead to codegen issue.

Simple way to reproduce:

```scala
  val df = spark.range(1000)
  val columns = (0 until 400).map{ i => s"id as id$i" }
  val distributeExprs = (0 until 100).map(c => s"id$c").mkString(",")
  df.selectExpr(columns : _*).createTempView("test")
  spark.sql(s"select * from test distribute by ($distributeExprs)").count()
```

## How was this patch tested?

UT in Jenkins

Closes #22077 from LantaoJin/SPARK-25084_2.3.

Authored-by: LantaoJin <[email protected]>
Signed-off-by: Wenchen Fan <[email protected]>
## What changes were proposed in this pull request?

`ANALYZE TABLE ... PARTITION(...) COMPUTE STATISTICS` can fail with a NPE if a partition column contains a NULL value.

The PR avoids the NPE, replacing the `NULL` values with the default partition placeholder.

## How was this patch tested?

added UT

Closes #22036 from mgaido91/SPARK-25028.

Authored-by: Marco Gaido <[email protected]>
Signed-off-by: Wenchen Fan <[email protected]>
(cherry picked from commit c220cc4)
Signed-off-by: Wenchen Fan <[email protected]>
## What changes were proposed in this pull request?

This PR fixes the an example for `to_json` in doc and function description.

- http://spark.apache.org/docs/2.3.0/api/sql/#to_json
- `describe function extended`

## How was this patch tested?

Pass the Jenkins with the updated test.

Closes #22096 from dongjoon-hyun/minor_json.

Authored-by: Dongjoon Hyun <[email protected]>
Signed-off-by: hyukjinkwon <[email protected]>
(cherry picked from commit e2ab7de)
Signed-off-by: hyukjinkwon <[email protected]>
## What changes were proposed in this pull request?

The introduction of `AnalysisBarrier` prevented `FixNullability` to go through all the nodes. This introduced a bug, which can lead to wrong results, as the nullability of the output attributes of an outer join can be wrong.

The PR makes `FixNullability` going through the `AnalysisBarrier`s.

## How was this patch tested?

added UT

Author: Marco Gaido <[email protected]>

Closes #22102 from mgaido91/SPARK-25051.
## What changes were proposed in this pull request?

Put annotation args in one line, or API doc generation will fail.

~~~
[error] /Users/meng/src/spark/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala:1559: annotation argument needs to be a constant; found: "_FUNC_(expr) - Returns the character length of string data or number of bytes of ".+("binary data. The length of string data includes the trailing spaces. The length of binary ").+("data includes binary zeros.")
[error]     "binary data. The length of string data includes the trailing spaces. The length of binary " +
[error]                                                                                                  ^
[info] No documentation generated with unsuccessful compiler run
[error] one error found
[error] (catalyst/compile:doc) Scaladoc generation failed
[error] Total time: 27 s, completed Aug 17, 2018 3:20:08 PM
~~~

## How was this patch tested?

sbt catalyst/compile:doc passed

Closes #22137 from mengxr/minor-doc-fix.

Authored-by: Xiangrui Meng <[email protected]>
Signed-off-by: hyukjinkwon <[email protected]>
(cherry picked from commit f454d52)
Signed-off-by: hyukjinkwon <[email protected]>
## What changes were proposed in this pull request?

[SPARK-25144](https://issues.apache.org/jira/browse/SPARK-25144) reports memory leaks on Apache Spark 2.0.2 ~ 2.3.2-RC5.

```scala
scala> case class Foo(bar: Option[String])
scala> val ds = List(Foo(Some("bar"))).toDS
scala> val result = ds.flatMap(_.bar).distinct
scala> result.rdd.isEmpty
18/08/19 23:01:54 WARN Executor: Managed memory leak detected; size = 8650752 bytes, TID = 125
res0: Boolean = false
```

This is a backport of cloud-fan 's #21738 which is a single commit among 3 commits of SPARK-21743. In addition, I added a test case to prevent regressions in branch-2.3 and branch-2.2. Although SPARK-21743 is reverted due to regression, this subpatch can go to branch-2.3 and branch-2.2. This will be merged as cloud-fan 's commit.

## How was this patch tested?

Pass the jenkins with a newly added test case.

Closes #22150 from dongjoon-hyun/SPARK-25144.

Lead-authored-by: Wenchen Fan <[email protected]>
Co-authored-by: Dongjoon Hyun <[email protected]>
Signed-off-by: hyukjinkwon <[email protected]>
When j is 0, log(j+1) will be 0, and this leads to division by 0 issue.

## What changes were proposed in this pull request?

(Please fill in changes proposed in this fix)

## How was this patch tested?

(Please explain how this patch was tested. E.g. unit tests, integration tests, manual tests)
(If this patch involves UI changes, please attach a screenshot; otherwise, remove this)

Please review http://spark.apache.org/contributing.html before opening a pull request.

Closes #22090 from yueguoguo/patch-1.

Authored-by: Zhang Le <[email protected]>
Signed-off-by: Sean Owen <[email protected]>
(cherry picked from commit 219ed7b)
Signed-off-by: Sean Owen <[email protected]>
@srowen srowen mentioned this pull request Aug 20, 2018
…en two words is divisible by Integer.MAX_VALUE.

#22079 (comment) It is possible for two objects to be unequal and yet we consider them as equal with this code, if the long values are separated by Int.MaxValue.
This PR fixes the issue.

Add new test cases in `RecordBinaryComparatorSuite`.

Closes #22101 from jiangxb1987/fix-rbc.

Authored-by: Xingbo Jiang <[email protected]>
Signed-off-by: Xiao Li <[email protected]>
(cherry picked from commit 4fb96e5)
Signed-off-by: Xiao Li <[email protected]>
@asfgit asfgit closed this in b8788b3 Aug 21, 2018
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