SparkStreamingExample | efficiently implement a Lambda Architecture

 by   gwenshap Scala Version: Current License: No License

kandi X-RAY | SparkStreamingExample Summary

kandi X-RAY | SparkStreamingExample Summary

SparkStreamingExample is a Scala library typically used in Big Data, Kafka, Spark, Hadoop applications. SparkStreamingExample has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

This project is intended to show an example of how Spark can be used to efficiently implement a Lambda Architecture. Lambda Architectures typically share some of the business logic between the batch layer and speed layer. When each layer is implemented in a different language or framework, this leads to code duplication, painful maintenance and errors. On the other hand, if Spark is used to implement the batch layer and SparkStreaming for the speed layer, they can share common functions, reducing code duplication and the associated maintenance overhead. This project is intended as an example of how this can be done. It contains two packages for counting errors in logs. One for batch use and the other for streaming. ##Build mvn clean package. java -cp SparkStreamingLambda-1.0-SNAPSHOT.jar: /lib/spark-assembly-1.0.2-hadoop2.2.0.jar cloudera.fun.sparklambda.etl.BatchErrorCount. java -cp SparkStreamingLambda-1.0-SNAPSHOT.jar: /lib/spark-assembly-1.0.2-hadoop2.2.0.jar cloudera.fun.sparklambda.streaming.StreamingErrorCount localhost. to send data to the streaming example, use: nc -lk.
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              SparkStreamingExample has a low active ecosystem.
              It has 55 star(s) with 39 fork(s). There are 3 watchers for this library.
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              It had no major release in the last 6 months.
              There are 1 open issues and 0 have been closed. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of SparkStreamingExample is current.

            kandi-Quality Quality

              SparkStreamingExample has no bugs reported.

            kandi-Security Security

              SparkStreamingExample has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              SparkStreamingExample does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
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              Without a license, all rights are reserved, and you cannot use the library in your applications.

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              SparkStreamingExample releases are not available. You will need to build from source code and install.

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            SparkStreamingExample Key Features

            No Key Features are available at this moment for SparkStreamingExample.

            SparkStreamingExample Examples and Code Snippets

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            Community Discussions

            QUESTION

            from_json is not converting json to DF in spark structured streaming
            Asked 2020-Jun-18 at 15:47

            Hi I am new to spark streaming.I am trying to implement a streaming solution that will read the json message from kafka and store it in Cassandra.The problem I am facing is from_json is not converting the json to Case class.

            Here is my Json:

            ...

            ANSWER

            Answered 2020-Jun-18 at 15:47

            I think you were almost close

            Steps I followed

            1. Load the JSON as List of Strings in Dataframe
            2. Created and encoder from the Bean44
            3. Parsed the json using from_json to Bean44 struct type
            4. df.select("data.*") same as you and added .as[Bean44] to get Dataset[Bean44]

            Source https://stackoverflow.com/questions/62447642

            QUESTION

            How do you properly set up Scala Spark libraryDependencies with the correct version of Scala?
            Asked 2018-Sep-26 at 21:08

            I'm new to Scala Spark and I'm trying to create an example project using Intellij. During Project creation I choose Scala and Sbt with Scala version 2.12 but When I tried adding spark-streaming version 2.3.2 if kept erroring out so I Google'd around and on Apache's website I found the sbt config shown below and I'm still getting the same error.

            ...

            ANSWER

            Answered 2018-Sep-26 at 21:08

            You can see the version of Scala that is supported by Spark in the Spark documentation.

            As of this writing, the documentation says:

            Spark runs on Java 8+, Python 2.7+/3.4+ and R 3.1+. For the Scala API, Spark 2.3.2 uses Scala 2.11. You will need to use a compatible Scala version (2.11.x).

            Notice that only Scala 2.11.x is supported.

            Source https://stackoverflow.com/questions/52526002

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install SparkStreamingExample

            You can download it from GitHub.

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            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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            gh repo clone gwenshap/SparkStreamingExample

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            git@github.com:gwenshap/SparkStreamingExample.git

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