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This tutorial teaches you how to run a .NET for Apache Spark app using .NET Core on Windows, MacOS, and Ubuntu.
In this tutorial, you learn how to:
- Prepare your environment for .NET for Apache Spark
- Write your first .NET for Apache Spark application
- Build and run your simple .NET for Apache Spark application
Prepare your environment
Before you begin writing your app, you need to set up some prerequisite dependencies. If you can run
dotnet
, java
, mvn
, spark-shell
from your command line environment, then your environment is already prepared and you can skip to the next section. If you cannot run any or all of the commands, do the following steps.1. Install .NET
To start building .NET apps, you need to download and install the .NET SDK (Software Development Kit).
Download and install the .NET Core SDK. Installing the SDK adds the
dotnet
toolchain to your PATH.Once you've installed the .NET Core SDK, open a new command prompt or terminal and run
dotnet
.If the command runs and prints out information about how to use dotnet, can move to the next step. If you receive a
'dotnet' is not recognized as an internal or external command
error, make sure you opened a new command prompt or terminal before running the command.2. Install Java
Install Java 8.1 for Windows and MacOS, or OpenJDK 8 for Ubuntu.
Select the appropriate version for your operating system. For example, select jdk-8u201-windows-x64.exe for a Windows x64 machine (as shown below) or jdk-8u231-macosx-x64.dmg for MacOS. Then, use the command
java
to verify the installation.3. Install compression software
Apache Spark is downloaded as a compressed .tgz file. Use an extraction program, like 7-Zip or WinZip, to extract the file.
4. Install Apache Spark
Download and install Apache Spark. You'll need to select from version 2.3.* or 2.4.0, 2.4.1, 2.4.3, or 2.4.4 (.NET for Apache Spark is not compatible with other versions of Apache Spark).
The commands used in the following steps assume you have downloaded and installed Apache Spark 2.4.1. If you wish to use a different version, replace 2.4.1 with the appropriate version number. Then, extract the .tar file and the Apache Spark files.
To extract the nested .tar file:
- Locate the spark-2.4.1-bin-hadoop2.7.tgz file that you downloaded.
- Right click on the file and select 7-Zip -> Extract here.
- spark-2.4.1-bin-hadoop2.7.tar is created alongside the .tgz file you downloaded.
To extract the Apache Spark files:
- Right click on spark-2.4.1-bin-hadoop2.7.tar and select 7-Zip -> Extract files..
- Enter C:bin in the Extract to field.
- Uncheck the checkbox below the Extract to field.
- Select OK.
- The Apache Spark files are extracted to C:binspark-2.4.1-bin-hadoop2.7
Run the following commands to set the environment variables used to locate Apache Spark on Windows:
Run the following commands to set the environment variables used to locate Apache Spark on MacOS and Ubuntu:
Once you've installed everything and set your environment variables, open a new command prompt or terminal and run the following command:
%SPARK_HOME%binspark-submit --version
If the command runs and prints version information, you can move to the next step.
https://craftrenew484.weebly.com/blog/pirates-bay-os-x-mavericksdmg. If you receive a
'spark-submit' is not recognized as an internal or external command
error, make sure you opened a new command prompt.5. Install .NET for Apache Spark
Download the Microsoft.Spark.Worker release from the .NET for Apache Spark GitHub. For example if you're on a Windows machine and plan to use .NET Core, download the Windows x64 netcoreapp3.1 release.
To extract the Microsoft.Spark.Worker: https://craftrenew484.weebly.com/blog/why-did-sukirti-leave-dmg.
- Locate the Microsoft.Spark.Worker.netcoreapp3.1.win-x64-0.8.0.zip file that you downloaded.
- Right click and select 7-Zip -> Extract files...
- Enter C:bin in the Extract to field.
- Uncheck the checkbox below the Extract to field.
- Select OK.
6. Install WinUtils (Windows only)
.NET for Apache Spark requires WinUtils to be installed alongside Apache Spark. Download winutils.exe. Then, copy WinUtils into C:binspark-2.4.1-bin-hadoop2.7bin.
Note
If you are using a different version of Hadoop, which is annotated at the end of your Spark install folder name, select the version of WinUtils that's compatible with your version of Hadoop.
7. Set DOTNET_WORKER_DIR and check dependencies
Run one of the following commands to set the
DOTNET_WORKER_DIR
Environment Variable, which is used by .NET apps to locate .NET for Apache Spark.On Windows, create a new environment variable
DOTNET_WORKER_DIR
and set it to the directory where you downloaded and extracted the Microsoft.Spark.Worker (for example, C:binMicrosoft.Spark.Worker
).On MacOS, create a new environment variable using
export DOTNET_WORKER_DIR <your_path>
and set it to the directory where you downloaded and extracted the Microsoft.Spark.Worker (for example, ~/bin/Microsoft.Spark.Worker/).On Ubuntu, create a new environment variable
DOTNET_WORKER_DIR
and set it to the directory where you downloaded and extracted the Microsoft.Spark.Worker (for example, ~/bin/Microsoft.Spark.Worker).Finally, double-check that you can run
dotnet
, java
, mvn
, spark-shell
from your command line before you move to the next section.Write a .NET for Apache Spark app
1. Create a console app
![Jdk-8u231-macosx-x64.dmg Jdk-8u231-macosx-x64.dmg](/uploads/1/3/3/9/133947062/406091272.webp)
In your command prompt or terminal, run the following commands to create a new console application:
The
dotnet
command creates a new
application of type console
for you. The -o
parameter creates a directory named mySparkApp where your app is stored and populates it with the required files. The cd mySparkApp
command changes the directory to the app directory you just created.2. Install NuGet package
To use .NET for Apache Spark in an app, install the Microsoft.Spark package. In your command prompt or terminal, run the following command:
dotnet add package Microsoft.Spark --version 0.8.0
3. Code your app
Open Program.cs in Visual Studio Code, or any text editor, and replace all of the code with the following:
Jdk 8u231 Mac Os X X64 Dmg Download
4. Create and add a data file
Open your command prompt or terminal and navigate into your app folder.
Your app processes a file containing lines of text. Create an input.txt file in your mySparkApp directory, containing the following text:
Run your .NET for Apache Spark app
- Run the following command to build your application:
- Run the following command to submit your application to run on Apache Spark:NoteThis command assumes you have downloaded Apache Spark and added it to your PATH environment variable to be able to use
spark-submit
. Otherwise, you'd have to use the full path (for example, C:binapache-sparkbinspark-submit or ~/spark/bin/spark-submit). - When your app runs, the word count data of the input.txt file is written to the console.
Jdk-8u241-macosx-x64.dmg
Congratulations! You successfully authored and ran a .NET for Apache Spark app.
Next steps
In this tutorial, you learned how to:
- Prepare your Windows environment for .NET for Apache Spark
- Write your first .NET for Apache Spark application
- Build and run your simple .NET for Apache Spark application
Jdk 8u221 Windows X64 Download
To see a video explaining the steps above, checkout the .NET for Apache Spark 101 video series.
Check out the resources page to learn more.