## What changes were proposed in this pull request?
Fix spelling in quick-start doc.
## How was this patch tested?
Doc only.
Author: Shashwat Anand <me@shashwat.me>
Closes#20336 from ashashwat/SPARK-23165.
## What changes were proposed in this pull request?
Like `Parquet`, users can use `ORC` with Apache Spark structured streaming. This PR adds `orc()` to `DataStreamReader`(Scala/Python) in order to support creating streaming dataset with ORC file format more easily like the other file formats. Also, this adds a test coverage for ORC data source and updates the document.
**BEFORE**
```scala
scala> spark.readStream.schema("a int").orc("/tmp/orc_ss").writeStream.format("console").start()
<console>:24: error: value orc is not a member of org.apache.spark.sql.streaming.DataStreamReader
spark.readStream.schema("a int").orc("/tmp/orc_ss").writeStream.format("console").start()
```
**AFTER**
```scala
scala> spark.readStream.schema("a int").orc("/tmp/orc_ss").writeStream.format("console").start()
res0: org.apache.spark.sql.streaming.StreamingQuery = org.apache.spark.sql.execution.streaming.StreamingQueryWrapper678b3746
scala>
-------------------------------------------
Batch: 0
-------------------------------------------
+---+
| a|
+---+
| 1|
+---+
```
## How was this patch tested?
Pass the newly added test cases.
Author: Dongjoon Hyun <dongjoon@apache.org>
Closes#19975 from dongjoon-hyun/SPARK-22781.
## What changes were proposed in this pull request?
Update the line "For example, the data (12:09, cat) is out of order and late, and it falls in windows 12:05 - 12:15 and 12:10 - 12:20." as follow "For example, the data (12:09, cat) is out of order and late, and it falls in windows 12:00 - 12:10 and 12:05 - 12:15." under the programming structured streaming programming guide.
Author: Riccardo Corbella <r.corbella@reply.it>
Closes#19137 from riccardocorbella/bugfix.
## What changes were proposed in this pull request?
Add missing import and missing parentheses to invoke `SparkSession::text()`.
## How was this patch tested?
Built and the code for this application, ran jekyll locally per docs/README.md.
Author: Christiam Camacho <camacho@ncbi.nlm.nih.gov>
Closes#18795 from christiam/master.
## What changes were proposed in this pull request?
SPARK-20979 added a new structured streaming source: Rate source. This patch adds the corresponding documentation to programming guide.
## How was this patch tested?
Tested by running jekyll locally.
Author: Prashant Sharma <prashant@apache.org>
Author: Prashant Sharma <prashsh1@in.ibm.com>
Closes#18562 from ScrapCodes/spark-21069/rate-source-docs.
## What changes were proposed in this pull request?
Few changes to the Structured Streaming documentation
- Clarify that the entire stream input table is not materialized
- Add information for Ganglia
- Add Kafka Sink to the main docs
- Removed a couple of leftover experimental tags
- Added more associated reading material and talk videos.
In addition, https://github.com/apache/spark/pull/16856 broke the link to the RDD programming guide in several places while renaming the page. This PR fixes those sameeragarwal cloud-fan.
- Added a redirection to avoid breaking internal and possible external links.
- Removed unnecessary redirection pages that were there since the separate scala, java, and python programming guides were merged together in 2013 or 2014.
## 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: Tathagata Das <tathagata.das1565@gmail.com>
Closes#18485 from tdas/SPARK-21267.
## What changes were proposed in this pull request?
The description for several options of File Source for structured streaming appeared in the File Sink description instead.
This pull request has two commits: The first includes changes to the version as it appeared in spark 2.1 and the second handled an additional option added for spark 2.2
## How was this patch tested?
Built the documentation by SKIP_API=1 jekyll build and visually inspected the structured streaming programming guide.
The original documentation was written by tdas and lw-lin
Author: assafmendelson <assaf.mendelson@gmail.com>
Closes#18342 from assafmendelson/spark-21123.
## What changes were proposed in this pull request?
`df.groupBy.count()` should be `df.groupBy().count()` , otherwise there is an error :
ambiguous reference to overloaded definition, both method groupBy in class Dataset of type (col1: String, cols: String*) and method groupBy in class Dataset of type (cols: org.apache.spark.sql.Column*)
## How was this patch tested?
```scala
val df = spark.readStream.schema(...).json(...)
val dfCounts = df.groupBy().count()
```
Author: Ziyue Huang <zyhuang94@gmail.com>
Closes#18272 from ZiyueHuang/master.
Now that Structured Streaming has been out for several Spark release and has large production use cases, the `Experimental` label is no longer appropriate. I've left `InterfaceStability.Evolving` however, as I think we may make a few changes to the pluggable Source & Sink API in Spark 2.3.
Author: Michael Armbrust <michael@databricks.com>
Closes#18065 from marmbrus/streamingGA.
## What changes were proposed in this pull request?
Any Dataset/DataFrame batch query with the operation `withWatermark` does not execute because the batch planner does not have any rule to explicitly handle the EventTimeWatermark logical plan.
The right solution is to simply remove the plan node, as the watermark should not affect any batch query in any way.
Changes:
- In this PR, we add a new rule `EliminateEventTimeWatermark` to check if we need to ignore the event time watermark. We will ignore watermark in any batch query.
Depends upon:
- [SPARK-20672](https://issues.apache.org/jira/browse/SPARK-20672). We can not add this rule into analyzer directly, because streaming query will be copied to `triggerLogicalPlan ` in every trigger, and the rule will be applied to `triggerLogicalPlan` mistakenly.
Others:
- A typo fix in example.
## How was this patch tested?
add new unit test.
Author: uncleGen <hustyugm@gmail.com>
Closes#17896 from uncleGen/SPARK-20373.
## What changes were proposed in this pull request?
Add
- R vignettes
- R programming guide
- SS programming guide
- R example
Also disable spark.als in vignettes for now since it's failing (SPARK-20402)
## How was this patch tested?
manually
Author: Felix Cheung <felixcheung_m@hotmail.com>
Closes#17814 from felixcheung/rdocss.
## What changes were proposed in this pull request?
Typos at a couple of place in the docs.
## How was this patch tested?
build including docs
Please review http://spark.apache.org/contributing.html before opening a pull request.
Author: ymahajan <ymahajan@snappydata.io>
Closes#17690 from ymahajan/master.
## What changes were proposed in this pull request?
1. Omitted space between the sentences: `... on static data.The Spark SQL engine will ...` -> `... on static data. The Spark SQL engine will ...`
2. Omitted colon in Output Model section.
## How was this patch tested?
None.
Author: Lee Dongjin <dongjin@apache.org>
Closes#17564 from dongjinleekr/feature/fix-programming-guide.
## What changes were proposed in this pull request?
- Fixed bug in Java API not passing timeout conf to scala API
- Updated markdown docs
- Updated scala docs
- Added scala and Java example
## How was this patch tested?
Manually ran examples.
Author: Tathagata Das <tathagata.das1565@gmail.com>
Closes#17539 from tdas/SPARK-20224.
Fixed a few typos.
There is one more I'm not sure of:
```
Append mode uses watermark to drop old aggregation state. But the output of a
windowed aggregation is delayed the late threshold specified in `withWatermark()` as by
the modes semantics, rows can be added to the Result Table only once after they are
```
Not sure how to change `is delayed the late threshold`.
Author: Seigneurin, Alexis (CONT) <Alexis.Seigneurin@capitalone.com>
Closes#17443 from aseigneurin/typos.
## What changes were proposed in this pull request?
Add backslash for line continuation in python code.
## How was this patch tested?
Jenkins.
Author: uncleGen <hustyugm@gmail.com>
Author: dylon <hustyugm@gmail.com>
Closes#17352 from uncleGen/python-example-doc.
## What changes were proposed in this pull request?
- SS python example: `TypeError: 'xxx' object is not callable`
- some other doc issue.
## How was this patch tested?
Jenkins.
Author: uncleGen <hustyugm@gmail.com>
Closes#17257 from uncleGen/docs-ss-python.
## What changes were proposed in this pull request?
Today, we compare the whole path when deciding if a file is new in the FileSource for structured streaming. However, this would cause false negatives in the case where the path has changed in a cosmetic way (i.e. changing `s3n` to `s3a`).
This patch adds an option `fileNameOnly` that causes the new file check to be based only on the filename (but still store the whole path in the log).
## Usage
```scala
spark
.readStream
.option("fileNameOnly", true)
.text("s3n://bucket/dir1/dir2")
.writeStream
...
```
## How was this patch tested?
Added a test case
Author: Liwei Lin <lwlin7@gmail.com>
Closes#17120 from lw-lin/filename-only.
## What changes were proposed in this pull request?
Minor typo in `even-time`, which is changed to `event-time` and a couple of grammatical errors fix.
## How was this patch tested?
N/A - since this is a doc fix. I did a jekyll build locally though.
Author: Ramkumar Venkataraman <rvenkataraman@paypal.com>
Closes#17037 from ramkumarvenkat/doc-fix.
- Move external/java8-tests tests into core, streaming, sql and remove
- Remove MaxPermGen and related options
- Fix some reflection / TODOs around Java 8+ methods
- Update doc references to 1.7/1.8 differences
- Remove Java 7/8 related build profiles
- Update some plugins for better Java 8 compatibility
- Fix a few Java-related warnings
For the future:
- Update Java 8 examples to fully use Java 8
- Update Java tests to use lambdas for simplicity
- Update Java internal implementations to use lambdas
## How was this patch tested?
Existing tests
Author: Sean Owen <sowen@cloudera.com>
Closes#16871 from srowen/SPARK-19493.
## What changes were proposed in this pull request?
This PR allow update mode for non-aggregation streaming queries. It will be same as the append mode if a query has no aggregations.
## How was this patch tested?
Jenkins
Author: Shixiong Zhu <shixiong@databricks.com>
Closes#16520 from zsxwing/update-without-agg.
## What changes were proposed in this pull request?
There are many locations in the Spark repo where the same word occurs consecutively. Sometimes they are appropriately placed, but many times they are not. This PR removes the inappropriately duplicated words.
## How was this patch tested?
N/A since only docs or comments were updated.
Author: Niranjan Padmanabhan <niranjan.padmanabhan@gmail.com>
Closes#16455 from neurons/np.structure_streaming_doc.
## What changes were proposed in this pull request?
Currently some code snippets in the programming guide just do not compile. We should fix them.
## How was this patch tested?
```
SKIP_API=1 jekyll build
```
## Screenshot from part of the change:
Author: Liwei Lin <lwlin7@gmail.com>
Closes#16442 from lw-lin/ss-pro-guide-.
## What changes were proposed in this pull request?
Update the python section of the Structured Streaming Guide from .builder() to .builder
## How was this patch tested?
Validated documentation and successfully running the test example.
Please review https://cwiki.apache.org/confluence/display/SPARK/Contributing+to+Spark before opening a pull request.
'Builder' object is not callable object hence changed .builder() to
.builder
Author: Denny Lee <dennylee@gallifrey.local>
Closes#15872 from dennyglee/master.
## What changes were proposed in this pull request?
This PR merges multiple lines enumerating items in order to remove the redundant spaces following slashes in [Structured Streaming Programming Guide in 2.0.2-rc1](http://people.apache.org/~pwendell/spark-releases/spark-2.0.2-rc1-docs/structured-streaming-programming-guide.html).
- Before: `Scala/ Java/ Python`
- After: `Scala/Java/Python`
## How was this patch tested?
Manual by the followings because this is documentation update.
```
cd docs
SKIP_API=1 jekyll build
```
Author: Dongjoon Hyun <dongjoon@apache.org>
Closes#15686 from dongjoon-hyun/minor_doc_space.
## What changes were proposed in this pull request?
This PR adds a new project ` external/kafka-0-10-sql` for Structured Streaming Kafka source.
It's based on the design doc: https://docs.google.com/document/d/19t2rWe51x7tq2e5AOfrsM9qb8_m7BRuv9fel9i0PqR8/edit?usp=sharing
tdas did most of work and part of them was inspired by koeninger's work.
### Introduction
The Kafka source is a structured streaming data source to poll data from Kafka. The schema of reading data is as follows:
Column | Type
---- | ----
key | binary
value | binary
topic | string
partition | int
offset | long
timestamp | long
timestampType | int
The source can deal with deleting topics. However, the user should make sure there is no Spark job processing the data when deleting a topic.
### Configuration
The user can use `DataStreamReader.option` to set the following configurations.
Kafka Source's options | value | default | meaning
------ | ------- | ------ | -----
startingOffset | ["earliest", "latest"] | "latest" | The start point when a query is started, either "earliest" which is from the earliest offset, or "latest" which is just from the latest offset. Note: This only applies when a new Streaming query is started, and that resuming will always pick up from where the query left off.
failOnDataLost | [true, false] | true | Whether to fail the query when it's possible that data is lost (e.g., topics are deleted, or offsets are out of range). This may be a false alarm. You can disable it when it doesn't work as you expected.
subscribe | A comma-separated list of topics | (none) | The topic list to subscribe. Only one of "subscribe" and "subscribeParttern" options can be specified for Kafka source.
subscribePattern | Java regex string | (none) | The pattern used to subscribe the topic. Only one of "subscribe" and "subscribeParttern" options can be specified for Kafka source.
kafka.consumer.poll.timeoutMs | long | 512 | The timeout in milliseconds to poll data from Kafka in executors
fetchOffset.numRetries | int | 3 | Number of times to retry before giving up fatch Kafka latest offsets.
fetchOffset.retryIntervalMs | long | 10 | milliseconds to wait before retrying to fetch Kafka offsets
Kafka's own configurations can be set via `DataStreamReader.option` with `kafka.` prefix, e.g, `stream.option("kafka.bootstrap.servers", "host:port")`
### Usage
* Subscribe to 1 topic
```Scala
spark
.readStream
.format("kafka")
.option("kafka.bootstrap.servers", "host:port")
.option("subscribe", "topic1")
.load()
```
* Subscribe to multiple topics
```Scala
spark
.readStream
.format("kafka")
.option("kafka.bootstrap.servers", "host:port")
.option("subscribe", "topic1,topic2")
.load()
```
* Subscribe to a pattern
```Scala
spark
.readStream
.format("kafka")
.option("kafka.bootstrap.servers", "host:port")
.option("subscribePattern", "topic.*")
.load()
```
## How was this patch tested?
The new unit tests.
Author: Shixiong Zhu <shixiong@databricks.com>
Author: Tathagata Das <tathagata.das1565@gmail.com>
Author: Shixiong Zhu <zsxwing@gmail.com>
Author: cody koeninger <cody@koeninger.org>
Closes#15102 from zsxwing/kafka-source.
## What changes were proposed in this pull request?
When reading file stream with non-globbing path, the results return data with all `null`s for the
partitioned columns. E.g.,
case class A(id: Int, value: Int)
val data = spark.createDataset(Seq(
A(1, 1),
A(2, 2),
A(2, 3))
)
val url = "/tmp/test"
data.write.partitionBy("id").parquet(url)
spark.read.parquet(url).show
+-----+---+
|value| id|
+-----+---+
| 2| 2|
| 3| 2|
| 1| 1|
+-----+---+
val s = spark.readStream.schema(spark.read.load(url).schema).parquet(url)
s.writeStream.queryName("test").format("memory").start()
sql("SELECT * FROM test").show
+-----+----+
|value| id|
+-----+----+
| 2|null|
| 3|null|
| 1|null|
+-----+----+
## How was this patch tested?
Jenkins tests.
Author: Liang-Chi Hsieh <simonh@tw.ibm.com>
Author: Liang-Chi Hsieh <viirya@gmail.com>
Closes#14803 from viirya/filestreamsource-option.
## What changes were proposed in this pull request?
Fix minor typos python example code in streaming programming guide
## How was this patch tested?
N/A
Author: Dmitriy Sokolov <silentsokolov@gmail.com>
Closes#14805 from silentsokolov/fix-typos.
## What changes were proposed in this pull request?
When documentation is built is should reference examples from the same build. There are times when the docs have links that point to files in the GitHub head which may not be valid on the current release. Changed that in URLs to make them point to the right tag in git using ```SPARK_VERSION_SHORT```
…from its own release version] [Streaming programming guide]
Author: Jagadeesan <as2@us.ibm.com>
Closes#14596 from jagadeesanas2/SPARK-12370.
## What changes were proposed in this pull request?
Originally this PR was based on #14491 but I realised that fixing examples are more sensible rather than comments.
This PR fixes three things below:
- Fix two wrong examples in `structured-streaming-programming-guide.md`. Loading via `read.load(..)` without `as` will be `Dataset<Row>` not `Dataset<String>` in Java.
- Fix indentation across `structured-streaming-programming-guide.md`. Python has 4 spaces and Scala and Java have double spaces. These are inconsistent across the examples.
- Fix `StructuredNetworkWordCountWindowed` and `StructuredNetworkWordCount` in Java and Scala to initially load `DataFrame` and `Dataset<Row>` to be consistent with the comments and some examples in `structured-streaming-programming-guide.md` and to match Scala and Java to Python one (Python one loads it as `DataFrame` initially).
## How was this patch tested?
N/A
Closes https://github.com/apache/spark/pull/14491
Author: hyukjinkwon <gurwls223@gmail.com>
Author: Ganesh Chand <ganeshchand@Ganeshs-MacBook-Pro-2.local>
Closes#14564 from HyukjinKwon/SPARK-16886.
## What changes were proposed in this pull request?
Fix parquet to csv in a comment to match the input format being read.
## How was this patch tested?
N/A (doc change only)
Author: Holden Karau <holden@us.ibm.com>
Closes#14274 from holdenk/minor-docfix-schema-of-csv-rather-than-parquet.
## What changes were proposed in this pull request?
Minor fixes correcting some typos, punctuations, grammar.
Adding more anchors for easy navigation.
Fixing minor issues with code snippets.
## How was this patch tested?
`jekyll serve`
Author: Ahmed Mahran <ahmed.mahran@mashin.io>
Closes#14234 from ahmed-mahran/b-struct-streaming-docs.
## What changes were proposed in this pull request?
Updated structured streaming programming guide with new windowed example.
## How was this patch tested?
Docs
Author: James Thomas <jamesjoethomas@gmail.com>
Closes#14183 from jjthomas/ss_docs_update.
