SparkStreamingExample | efficiently implement a Lambda Architecture
kandi X-RAY | SparkStreamingExample Summary
kandi X-RAY | SparkStreamingExample Summary
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.
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of SparkStreamingExample
SparkStreamingExample Key Features
SparkStreamingExample Examples and Code Snippets
Community Discussions
Trending Discussions on SparkStreamingExample
QUESTION
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 15:47I think you were almost close
Steps I followed
- Load the JSON as List of Strings in Dataframe
- Created and encoder from the
Bean44
- Parsed the json using
from_json
toBean44
struct type df.select("data.*")
same as you and added.as[Bean44]
to getDataset[Bean44]
QUESTION
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 21:08You 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.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install SparkStreamingExample
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page