itr.map(data => { val yourActualResult = // do something with your data and conn here if(itr.isEmpty) conn.close // close the connection yourActualResult }) }) 一开始我认为这是一个 Spark 问题,但实际上是一个 scala 问题。http://www.scala-lang.org/api/2.12.0/scala/collection/Iterato...
您好 我正在尝试下载spark-core,spark-streaming,twitter4j, 和spark-streaming-twitter在下面的 build.sbt 文件中: name := "hello" version := "1.0" scalaVersion := "2.11.8" libraryDependencies += "org.apache.spark" %% "spark-core" % "1.6.1" libraryDependencies += "org.apache.spark" % "sp...
Solved: hi cloudera, I need to use Spark on a host that is not part of the Cloudera cluster to run Spark jobs - 382633
This will provide the environment to deploy examples of both Python and Scala examples to the Spark cluster using spark-submit command. If you are new to Apache Spark or want to learn more, you are encouraged to check out theSpark with Scala tutorialsorSpark with Python tutorials. Table of ...
logical plan and send processed data to apply filters, thus reducing the total load on processing. The logical query is optimized in such a way that there’s always a predicate pushdown for optimal execution of the next part of the query. We usedApache Sparkwith scala API for this use ...
If you use Scala as the development language, you can compile the SparkLauncher class by referring to the following code: def main(args: Array[String]) { println(s"com.huawei.bigdata.spark.examples.SparkLauncherExample <mode> <jarParh> <app_main_class> <appArgs>") val launcher = new ...
Spark is a lightweight web framework written in Scala and supported for the Java programming language. Spark aims to provide a simple, fast, and flexible way to develop web applications. The advantages of the Spark framework include: 1. Easy to use: Spark provides a concise and easy to unde...
To sink metrics to Prometheus, you can use this third-party library:https://github.com/banzaicloud/spark-metrics. The last step is to instantiate the source and register it with SparkEnv: %scala val source: MySource = new MySource SparkEnv.get.metricsSystem.registerSource(source) ...
java -version; javac -version; scala -version; git --version The output displays the OpenJDK, Scala, and Git versions. Download Apache Spark on Ubuntu You can download the latest version of Spark from theApache website. For this tutorial, we will use Spark 3.5.3 withHadoop 3, the lates...
abID is the Oracle database ID identifying the specific instance you want to connect Spark with. Oracle df1 is the DataFrame, which contains data loaded from the Oracle database table. Example 4: Using Scala to Load Data from an Oracle Database With Wallet from OCI Object Storage Utilizing...