Setup Spark and Intellij on Windows to access a remote Hadoop cluster

Preamble

Developing directly on an Hadoop cluster is not the best development environment you would dream for yourself. Of course it makes easy the testing of your code as you can instantly submit it but in worst case your editor will be vi. Obviously what new generation developers want is a clever editor running on their Windows (Linux ?) desktop. By clever editor I mean one having syntax completion, suggesting to import packages when using a procedures, suggesting unused variables if any and so on… Small teasing: Intellij IDEA from JetBrains is a serious contenders nowadays, apparently much better than Eclipse that is more or less dying…

We, at last, improved a bit the editor part by installing VSCode and editing our file with SSH FS plugins. In clear we edit through SSH files located directly on the server and then using a shell terminal (MobaXterm , Putty, …) we are able to submit scripts directly onto our Hadoop cluster. This works if you do Python (even if a PySpark plugin is not available in VSCode) but if you do Scala you also have to run an sbt command, each time, to compile you Scala program. A bit cumbersome…

As said above Intellij IDEA from JetBrains is a very good Scala language editor and the community edition does a pretty decent job. But then difficulties rise as this software lack a remote SSH edition… So it works well for pure Scala script but if you need to access you Hive table you have to work a bit to configure it…

This blog post is all about this: building a productive Scala/PySpark development environment on your Windows desktop and access Hive tables of an Hadoop cluster.

Spark installation and configuration

Before going in small details I have first tried to make raw Spark installation working on my Windows machine. I have started by downloading it on official web site:

spark_installation01
spark_installation01

And unzip it in default D:\spark-2.4.4-bin-hadoop2.7 directory. You must set SPARK_HOME environment variable to the directory you have unzip Spark. For convenience you also need to add D:\spark-2.4.4-bin-hadoop2.7\bin in the path of your Windows account (restart PowerShell after) and confirm it’s all good with:

$env:path

Then issue spark-shell in a PowerShell session, you should get a warning like:

19/11/15 17:15:37 ERROR Shell: Failed to locate the winutils binary in the hadoop binary path
java.io.IOException: Could not locate executable null\bin\winutils.exe in the Hadoop binaries.
        at org.apache.hadoop.util.Shell.getQualifiedBinPath(Shell.java:379)
        at org.apache.hadoop.util.Shell.getWinUtilsPath(Shell.java:394)
        at org.apache.hadoop.util.Shell.<clinit>(Shell.java:387)
        at org.apache.hadoop.util.StringUtils.<clinit>(StringUtils.java:80)
        at org.apache.hadoop.security.SecurityUtil.getAuthenticationMethod(SecurityUtil.java:611)
        at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:273)
        at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:261)
        at org.apache.hadoop.security.UserGroupInformation.loginUserFromSubject(UserGroupInformation.java:791)
        at org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:761)
        at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:634)
        at org.apache.spark.util.Utils$$anonfun$getCurrentUserName$1.apply(Utils.scala:2422)
        at org.apache.spark.util.Utils$$anonfun$getCurrentUserName$1.apply(Utils.scala:2422)
        at scala.Option.getOrElse(Option.scala:121)
        at org.apache.spark.util.Utils$.getCurrentUserName(Utils.scala:2422)
        at org.apache.spark.SecurityManager.<init>(SecurityManager.scala:79)
        at org.apache.spark.deploy.SparkSubmit.secMgr$lzycompute$1(SparkSubmit.scala:348)
        at org.apache.spark.deploy.SparkSubmit.org$apache$spark$deploy$SparkSubmit$$secMgr$1(SparkSubmit.scala:348)
        at org.apache.spark.deploy.SparkSubmit$$anonfun$prepareSubmitEnvironment$7.apply(SparkSubmit.scala:356)
        at org.apache.spark.deploy.SparkSubmit$$anonfun$prepareSubmitEnvironment$7.apply(SparkSubmit.scala:356)
        at scala.Option.map(Option.scala:146)
        at org.apache.spark.deploy.SparkSubmit.prepareSubmitEnvironment(SparkSubmit.scala:355)
        at org.apache.spark.deploy.SparkSubmit.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:774)
        at org.apache.spark.deploy.SparkSubmit.doRunMain$1(SparkSubmit.scala:161)
        at org.apache.spark.deploy.SparkSubmit.submit(SparkSubmit.scala:184)
        at org.apache.spark.deploy.SparkSubmit.doSubmit(SparkSubmit.scala:86)
        at org.apache.spark.deploy.SparkSubmit$$anon$2.doSubmit(SparkSubmit.scala:920)
        at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:929)
        at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)

Take winutils.exe that is Windows binary for Hadoop version at: https://github.com/steveloughran/winutils and put it in D:\spark-2.4.4-bin-hadoop2.7\bin folder.

I have downloaded the one for Hadoop 2.7.1 (linked to my Hadoop cluster). You must also set environment variable HADOOP_HOME to D:\spark-2.4.4-bin-hadoop2.7. Then scala-shell command should execute with no error. You can make the suggested testing right now:

PS D:\> spark-shell
19/11/15 17:29:20 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Using Spark's default log4j profile: org/apache/spark/log4j-defaults.properties
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
Spark context Web UI available at http://client_machine.domain.com:4040
Spark context available as 'sc' (master = local[*], app id = local-1573835367367).
Spark session available as 'spark'.
Welcome to
      ____              __
     / __/__  ___ _____/ /__
    _\ \/ _ \/ _ `/ __/  '_/
   /___/ .__/\_,_/_/ /_/\_\   version 2.4.4
      /_/
 
Using Scala version 2.11.12 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_231)
Type in expressions to have them evaluated.
Type :help for more information.
 
scala> spark
res0: org.apache.spark.sql.SparkSession = org.apache.spark.sql.SparkSession@28532753
 
scala> sc
res1: org.apache.spark.SparkContext = org.apache.spark.SparkContext@44846c76
scala> val textFile = spark.read.textFile("D:/spark-2.4.4-bin-hadoop2.7/README.md")
textFile: org.apache.spark.sql.Dataset[String] = [value: string]
 
scala> textFile.count()
res2: Long = 105
 
scala> textFile.filter(line => line.contains("Spark")).count()
res3: Long = 20

And that’s it you have a local running working Spark environment with all the Spark clients: Spark shell, PySpark, Spark SQL, SparkR… I had to install Python 3.7.5 as it was not working with Python 3.8.0, might be corrected soon:

PS D:\> pyspark
Python 3.7.5 (tags/v3.7.5:5c02a39a0b, Oct 15 2019, 00:11:34) [MSC v.1916 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
19/11/15 17:28:09 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Using Spark's default log4j profile: org/apache/spark/log4j-defaults.properties
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
Welcome to
      ____              __
     / __/__  ___ _____/ /__
    _\ \/ _ \/ _ `/ __/  '_/
   /__ / .__/\_,_/_/ /_/\_\   version 2.4.4
      /_/
 
Using Python version 3.7.5 (tags/v3.7.5:5c02a39a0b, Oct 15 2019 00:11:34)
SparkSession available as 'spark'.
>>> textFile = spark.read.text("D:/spark-2.4.4-bin-hadoop2.7/README.md")
>>> textFile.count()
105

To access Hive running on my cluster I have taken the file called hive-site.xml in /etc/spark2/conf directory of one of my edge node where Spark was installed and put it in D:\spark-2.4.4-bin-hadoop2.7\conf folder. And it worked pretty well:

scala> val databases=spark.sql("show databases")
databases: org.apache.spark.sql.DataFrame = [databaseName: string]
 
scala> databases.show(10,false)
+------------------+
|databaseName      |
+------------------+
|activity          |
|admin             |
|alexandre_c300    |
|audit             |
|big_ews_processing|
|big_ews_raw       |
|big_ews_refined   |
|big_fdc_processing|
|big_fdc_raw       |
|big_fdc_refined   |
+------------------+
only showing top 10 rows

But it failed for a more complex example:

scala> val df01=spark.sql("select * from admin.tbl_concatenate")
df01: org.apache.spark.sql.DataFrame = [id_process: string, date_job_start: string ... 9 more fields]
 
scala> df01.printSchema()
root
 |-- id_process: string (nullable = true)
 |-- date_job_start: string (nullable = true)
 |-- date_job_stop: string (nullable = true)
 |-- action: string (nullable = true)
 |-- database_name: string (nullable = true)
 |-- table_name: string (nullable = true)
 |-- partition_name: string (nullable = true)
 |-- number_files_before: string (nullable = true)
 |-- partition_size_before: string (nullable = true)
 |-- number_files_after: string (nullable = true)
 |-- partition_size_after: string (nullable = true)
 
 
scala> df01.show(10,false)
java.lang.IllegalArgumentException: java.net.UnknownHostException: DataLakeHdfs
  at org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:378)
  at org.apache.hadoop.hdfs.NameNodeProxies.createNonHAProxy(NameNodeProxies.java:310)
  at org.apache.hadoop.hdfs.NameNodeProxies.createProxy(NameNodeProxies.java:176)
  at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:678)
  at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:619)

To solve this I have to copy hdfs-site.xml from /etc/hadoop/conf directory of one of my edge where HDFS Client has been installed and it worked much better:

scala> val df01=spark.sql("select * from admin.tbl_concatenate")
df01: org.apache.spark.sql.DataFrame = [id_process: string, date_job_start: string ... 9 more fields]
 
scala> df01.show(10,false)
19/11/15 17:45:01 WARN DomainSocketFactory: The short-circuit local reads feature cannot be used because UNIX Domain sockets are not available on Windows.
+----------+--------------+--------------+----------+----------------+------------------+----------------------------+-------------------+---------------------+------------------+--------------------+
|id_process|date_job_start|date_job_stop |action    |database_name   |table_name        |partition_name              |number_files_before|partition_size_before|number_files_after|partition_size_after|
+----------+--------------+--------------+----------+----------------+------------------+----------------------------+-------------------+---------------------+------------------+--------------------+
|10468     |20190830103323|20190830103439|compaction|prod_ews_refined|tbl_bin_param_stat|fab=C2WF/lot_partition=Q1111|3                  |1606889              |3                 |1606889             |
|10468     |20190830103859|20190830104224|compaction|prod_ews_refined|tbl_bin_param_stat|fab=C2WF/lot_partition=Q7180|7                  |37136990             |2                 |37130614            |
|10468     |20190830104251|20190830104401|compaction|prod_ews_refined|tbl_bin_param_stat|fab=C2WF/lot_partition=Q7210|4                  |22095872             |3                 |22094910            |
|10468     |20190830104435|20190830104624|compaction|prod_ews_refined|tbl_bin_param_stat|fab=C2WF/lot_partition=Q7250|4                  |73357246             |2                 |73352589            |
|10468     |20190830104659|20190830104759|compaction|prod_ews_refined|tbl_bin_param_stat|fab=C2WF/lot_partition=Q7280|1                  |1696312              |1                 |1696312             |
|10468     |20190830104845|20190830104952|compaction|prod_ews_refined|tbl_bin_param_stat|fab=C2WF/lot_partition=Q7350|3                  |3439184              |3                 |3439184             |
|10468     |20190830105023|20190830105500|compaction|prod_ews_refined|tbl_bin_param_stat|fab=C2WF/lot_partition=Q7371|6                  |62283893             |2                 |62274587            |
|10468     |20190830105532|20190830105718|compaction|prod_ews_refined|tbl_bin_param_stat|fab=C2WF/lot_partition=Q7382|5                  |25501396             |3                 |25497826            |
|10468     |20190830110118|20190830110316|compaction|prod_ews_refined|tbl_bin_param_stat|fab=C2WF/lot_partition=Q8030|3                  |74338924             |3                 |74338924            |
|10468     |20190830110413|20190830110520|compaction|prod_ews_refined|tbl_bin_param_stat|fab=C2WF/lot_partition=Q8039|3                  |5336123              |2                 |5335855             |
+----------+--------------+--------------+----------+----------------+------------------+----------------------------+-------------------+---------------------+------------------+--------------------+
only showing top 10 rows

And that’s it you have built a working local Spark environment able to access your Hadoop cluster figures. Of course your Spark power is limited to your client machine and you cannot use the full power of your cluster but to develop scripts this is more than enough…

Sbt installation and configuration

If you write Scala script the next step to submit them using spark-submit and leave the interactive mode will be to compile them and produce a jar file usable by spark-submit. I have to say this is a drawback versus developing in Python where your PySpark script will be directly usable as-is with this language. The speed is also apparently not a criteria as PySpark has same performance as Scala. The only reason to do Scala, except being hype, is the functionalities that are more in advance in Scala versus Python…

The installation is as simple as downloading it on sbt official web site. I have chosen to take the zip file and uncompressed it in d:\sbt directory. For convenience add d:\sbt\bin in your environment path. I have configured my corporate proxy in sbtconfig.txt file located in d:\sbt\conf as follow:

-Dhttp.proxyHost=proxy.domain.com
-Dhttp.proxyPort=8080
-Dhttp.proxyUser=account
-Dhttp.proxyPassword=password
PS D:\> mkdir foo-build
 
 
    Directory: D:\
 
 
Mode                LastWriteTime         Length Name
----                -------------         ------ ----
d-----       18/11/2019     12:07                foo-build
 
 
PS D:\> cd .\foo-build\
PS D:\foo-build> ni build.sbt
 
 
    Directory: D:\foo-build
 
 
Mode                LastWriteTime         Length Name
----                -------------         ------ ----
-a----       18/11/2019     12:08              0 build.sbt
PS D:\foo-build> sbt
 
[info] Updated file D:\foo-build\project\build.properties: set sbt.version to 1.3.3
[info] Loading project definition from D:\foo-build\project
nov. 18, 2019 12:08:39 PM lmcoursier.internal.shaded.coursier.cache.shaded.org.jline.utils.Log logr
WARNING: Unable to create a system terminal, creating a dumb terminal (enable debug logging for more information)
[info] Updating
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  | => foo-build-build / update 0s
[info] Resolved  dependencies
[warn]
[warn]  Note: Unresolved dependencies path:
[error] sbt.librarymanagement.ResolveException: Error downloading org.scala-sbt:sbt:1.3.3
[error]   Not found
[error]   Not found
[error]   download error: Caught java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required" (Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required") while downloading https://repo1.maven.org/maven2/org/scala-sbt/sbt/1.3.3/sbt-1.3.3.pom
[error]   not found: C:\Users\yjaquier\.ivy2\local\org.scala-sbt\sbt\1.3.3\ivys\ivy.xml
[error]   download error: Caught java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required" (Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required") while downloading https://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/org.scala-sbt/sbt/1.3.3/ivys/ivy.xml
[error]   download error: Caught java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required" (Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required") while downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/sbt/1.3.3/ivys/ivy.xml
[error] Error downloading org.scala-lang:scala-library:2.12.10
[error]   Not found
[error]   Not found
[error]   download error: Caught java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required" (Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required") while downloading https://repo1.maven.org/maven2/org/scala-lang/scala-library/2.12.10/scala-library-2.12.10.pom
[error]   not found: C:\Users\yjaquier\.ivy2\local\org.scala-lang\scala-library\2.12.10\ivys\ivy.xml
[error]   download error: Caught java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required" (Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required") while downloading https://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/org.scala-lang/scala-library/2.12.10/ivys/ivy.xml
[error]   download error: Caught java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required" (Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required") while downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-lang/scala-library/2.12.10/ivys/ivy.xml
[error]         at lmcoursier.CoursierDependencyResolution.unresolvedWarningOrThrow(CoursierDependencyResolution.scala:245)
[error]         at lmcoursier.CoursierDependencyResolution.$anonfun$update$34(CoursierDependencyResolution.scala:214)
[error]         at scala.util.Either$LeftProjection.map(Either.scala:573)
[error]         at lmcoursier.CoursierDependencyResolution.update(CoursierDependencyResolution.scala:214)
[error]         at sbt.librarymanagement.DependencyResolution.update(DependencyResolution.scala:60)
[error]         at sbt.internal.LibraryManagement$.resolve$1(LibraryManagement.scala:52)
[error]         at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$12(LibraryManagement.scala:102)
[error]         at sbt.util.Tracked$.$anonfun$lastOutput$1(Tracked.scala:69)
[error]         at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$20(LibraryManagement.scala:115)
[error]         at scala.util.control.Exception$Catch.apply(Exception.scala:228)
[error]         at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$11(LibraryManagement.scala:115)
[error]         at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$11$adapted(LibraryManagement.scala:96)
[error]         at sbt.util.Tracked$.$anonfun$inputChanged$1(Tracked.scala:150)
[error]         at sbt.internal.LibraryManagement$.cachedUpdate(LibraryManagement.scala:129)
[error]         at sbt.Classpaths$.$anonfun$updateTask0$5(Defaults.scala:2946)
[error]         at scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error]         at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:62)
[error]         at sbt.std.Transform$$anon$4.work(Transform.scala:67)
[error]         at sbt.Execute.$anonfun$submit$2(Execute.scala:281)
[error]         at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:19)
[error]         at sbt.Execute.work(Execute.scala:290)
[error]         at sbt.Execute.$anonfun$submit$1(Execute.scala:281)
[error]         at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:178)
[error]         at sbt.CompletionService$$anon$2.call(CompletionService.scala:37)
[error]         at java.util.concurrent.FutureTask.run(Unknown Source)
[error]         at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
[error]         at java.util.concurrent.FutureTask.run(Unknown Source)
[error]         at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
[error]         at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
[error]         at java.lang.Thread.run(Unknown Source)
[error] (update) sbt.librarymanagement.ResolveException: Error downloading org.scala-sbt:sbt:1.3.3
[error]   Not found
[error]   Not found
[error]   download error: Caught java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required" (Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required") while downloading https://repo1.maven.org/maven2/org/scala-sbt/sbt/1.3.3/sbt-1.3.3.pom
[error]   not found: C:\Users\yjaquier\.ivy2\local\org.scala-sbt\sbt\1.3.3\ivys\ivy.xml
[error]   download error: Caught java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required" (Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required") while downloading https://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/org.scala-sbt/sbt/1.3.3/ivys/ivy.xml
[error]   download error: Caught java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required" (Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required") while downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/sbt/1.3.3/ivys/ivy.xml
[error] Error downloading org.scala-lang:scala-library:2.12.10
[error]   Not found
[error]   Not found
[error]   download error: Caught java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required" (Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required") while downloading https://repo1.maven.org/maven2/org/scala-lang/scala-library/2.12.10/scala-library-2.12.10.pom
[error]   not found: C:\Users\yjaquier\.ivy2\local\org.scala-lang\scala-library\2.12.10\ivys\ivy.xml
[error]   download error: Caught java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required" (Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required") while downloading https://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/org.scala-lang/scala-library/2.12.10/ivys/ivy.xml
[error]   download error: Caught java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required" (Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required") while downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-lang/scala-library/2.12.10/ivys/ivy.xml
Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore? q

For file D:\foo-build\project\build.properties I had to change as follow as apparently there is an issue with sbt 1.3.3 repository:

sbt.version=1.2.8

This time it went well:

PS D:\foo-build> sbt
 
[info] Loading project definition from D:\foo-build\project
[info] Updating ProjectRef(uri("file:/D:/foo-build/project/"), "foo-build-build")...
[info] Done updating.
[info] Loading settings for project foo-build from build.sbt ...
[info] Set current project to foo-build (in build file:/D:/foo-build/)
[info] sbt server started at local:sbt-server-2b55615bd8de0c5ac354
sbt:foo-build>

As suggested in sbt official documentation I have issued:

sbt:foo-build> ~compile
[info] Updating ...
[info] Done updating.
[info] Compiling 1 Scala source to D:\foo-build\target\scala-2.12\classes ...
[info] Done compiling.
[success] Total time: 1 s, completed 18 nov. 2019 12:58:30
1. Waiting for source changes in project foo-build... (press enter to interrupt)

And create the Hello.scala file where suggested that is instantly compiled:

[info] Compiling 1 Scala source to D:\foo-build\target\scala-2.12\classes ...
[info] Done compiling.
[success] Total time: 1 s, completed 18 nov. 2019 12:58:51
2. Waiting for source changes in project foo-build... (press enter to interrupt)

You can run it using:

sbt:foo-build> run
[info] Running example.Hello
Hello
[success] Total time: 1 s, completed 18 nov. 2019 13:06:23

Create a jar file that can be submitted via spark-submit with:

sbt:foo-build> package
[info] Packaging D:\foo-build\target\scala-2.12\foo-build_2.12-0.1.0-SNAPSHOT.jar ...
[info] Done packaging.
[success] Total time: 0 s, completed 18 nov. 2019 16:15:06

Intellij IDEA from JetBrains

Java JDK is a prerequisite, I have personally installed release 1.8.0_231.

Once you have installed Intellij IDEA, the community edition does the job for basics things, the first thing you have to do is to install the Scala plugin (you will have to configure your corporate proxy):

spark_installation02
spark_installation02

Then create your first Scala project with Create New Project:

spark_installation03
spark_installation03

I have chosen Sbt 1.2.8 and Scala 2.12.10 as I had many issues with latest versions:

spark_installation04
spark_installation04

In src/main/scala folder create a new Scala Class (mouse left button click then New/Scala Class) and then select Object to create (for example) a file called scala_testing.scala. As an example:

spark_installation05
spark_installation05

Insert (for example) below Scala code in Scala object script you have just created:

import org.apache.spark.sql.SparkSession

object scala_testing {
  def main(args: Array[String]): Unit = {
    val spark = SparkSession.builder.appName("spark_scala_yannick")
      .master("local[*]")
      .enableHiveSupport()
      .getOrCreate()

    spark.sparkContext.setLogLevel("WARN")

    val databases=spark.sql("show databases")

    databases.show(100,false)
  }
}

In build.sbt file add the following dependencies to have a file looking like:

name := "scala_testing"
 
version := "0.1"
 
scalaVersion := "2.12.10"
 
libraryDependencies += "org.apache.spark" %% "spark-core" % "2.4.4"
libraryDependencies += "org.apache.spark" %% "spark-sql" % "2.4.4"
libraryDependencies += "org.apache.spark" %% "spark-hive" % "2.4.4"

Sbt proxy setting are not inherited (feature has been requested) from Intellij default proxy setting so you have to add the below VM parameters:

spark_installation06
spark_installation06

Remark:
-Dsbt.repository.secure=false is surely not the best idea of the world but I had issue configuring my proxy server in https. -Dsbt.gigahorse=false is to overcome a concurrency issue while downloading multiple packages at same time… Might not be required for you…

Once the build process is completed (dependencies download) if you execute the script you will end up with:

+------------+
|databaseName|
+------------+
|default     |
+------------+

We are still lacking the Hive configuration. To add it go in File/Project Structure and a new Java library

spark_installation07
spark_installation07

Browse to the Spark conf directory we configured in Spark installation and configuration chapter:

spark_installation08
spark_installation08

Choose Class as category:

spark_installation09
spark_installation09

I have finally selected all modules (not fully sure it’s required):

spark_installation10
spark_installation10

If you now re-execute the Sacala script you should now get the complete list of Hive databases of your Hadoop cluster:

+--------------------------+
|databaseName              |
+--------------------------+
|activity                  |
|admin                     |
|audit                     |
|big_processing            |
|big_raw                   |
|big_refined               |
|big_processing            |
.
.

Conclusion

I have also tried to submit directly from Intellij in YARN mode (so onto the Hadoop cluster) but even if I have been able to see my application in Resource Manager of YARN I have never succeeded to make it run normally. The YARN scheduler is taking my request but never satisfy it…

Any inputs are welcome…

References

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