000的和 |序号|语言|关键点| |---|---|---| |1|JavaScript|不再有回调地狱，变异步为顺序化思维，程序更加可读| |2|Go|高并发调度，通道让异步编程更简单| |3|Scala|(1) 简洁的异步编程(2) AKKA: 分布式计算框架| |4|Java|(1) fork/join(2) CompletableFuture(3) 反应式编程（Reactive Programming）| Println(sum) } next: ## Scala 关键点：(1)简洁的异步编程 (2) AKKA：分布式计算框架  ## 创建异步任务就是这么简洁 import scala.concurrent.ExecutionContext ExecutionContext.Implicits.global import scala.concurrent.Future import scala.io.StdIn import scala.util.Random object ExampleSimpleFuture extends App { // 创建一个异步任务 val future1 = Future { // 模拟异步任务执行

Kyuubi is compiled and pre-built against Spark 3 and Scala 2.12 You will probably meet runtime exceptions if you use Spark 2 or Spark with unsupported Scala versions. To install Spark, you need to unpack the session type SQL is refactored to INTERACTIVE, because Kyuubi supports not only SQL session, but also SCALA and PYTHON sessions. User need to use INTERACTIVE sessionType to look up the session event. - Since ExecuteStatement.scala:802022/03/08 12:03:5373 ms2/24hasNext at FetchIterator.scala:972022/03/08

Kyuubi is compiled and pre-built against Spark 3 and Scala 2.12 You will probably meet runtime exceptions if you use Spark 2 or Spark with unsupported Scala versions. To install Spark, you need to unpack the session type SQL is refactored to INTERACTIVE, because Kyuubi supports not only SQL session, but also SCALA and PYTHON sessions. User need to use INTERACTIVE sessionType to look up the session event. • Since i-spark-authz_${{scala.binary.version}}-${project.version}.jar • The least transitive dependencies needed, which are under ./extensions/spark/kyuubi-spark-authz/target/scala-${scala.binary.version}/jars

Kyuubi is compiled and pre-built against Spark 3 and Scala 2.12 You will probably meet runtime exceptions if you use Spark 2 or Spark with unsupported Scala versions. To install Spark, you need to unpack the session type SQL is refactored to INTERACTIVE, because Kyuubi supports not only SQL session, but also SCALA and PYTHON sessions. User need to use INTERACTIVE sessionType to look up the session event. - Since ExecuteStatement.scala:802022/03/08 12:03:5373 ms2/24hasNext at FetchIterator.scala:972022/03/08

Kyuubi is compiled and pre-built against Spark 3 and Scala 2.12 You will probably meet runtime exceptions if you use Spark 2 or Spark with unsupported Scala versions. To install Spark, you need to unpack the session type SQL is refactored to INTERACTIVE, because Kyuubi supports not only SQL session, but also SCALA and PYTHON sessions. User need to use INTERACTIVE sessionType to look up the session event. • Since i-spark-authz_${{scala.binary.version}}-${project.version}.jar • The least transitive dependencies needed, which are under ./extensions/spark/kyuubi-spark-authz/target/scala-${scala.binary.version}/jars

SparkContext: Starting job: collect at →ExecuteStatement.scala:49 2020-11-02 20:51:50.129 INFO scheduler.DAGScheduler: Job 0 finished: collect at →ExecuteStatement.scala:49, took 0.503838 s 2020-11-02 20:51:50.151 (d80a2664-342d-4f38-baaa-82e88e68a43b)select timestamp '2018-11-17' collect at ExecuteStatement.scala:492020/11/02 20:51:490.5 s1/11/1scala:424) at org.apache.spark.sql.execution.datasources.InsertIntoDataSourceCommand. →run(InsertIntoDataSourceCommand.scala:42) at org.apache.spark.sql.execution

SparkContext: Starting job: collect at →ExecuteStatement.scala:49 2020-11-02 20:51:50.129 INFO scheduler.DAGScheduler: Job 0 finished: collect at →ExecuteStatement.scala:49, took 0.503838 s 2020-11-02 20:51:50.151 (d80a2664-342d-4f38-baaa-82e88e68a43b)select timestamp '2018-11-17' collect at ExecuteStatement.scala:492020/11/02 20:51:490.5 s1/11/1scala:424) at org.apache.spark.sql.execution.datasources.InsertIntoDataSourceCommand. →run(InsertIntoDataSourceCommand.scala:42) at org.apache.spark.sql.execution

Kyuubi is compiled and pre-built against Spark 3 and Scala 2.12 You will probably meet runtime exceptions if you use Spark 2 or Spark with unsupported Scala versions. To install Spark, you need to unpack the session type SQL is refactored to INTERACTIVE, because Kyuubi supports not only SQL session, but also SCALA and PYTHON sessions. User need to use INTERACTIVE sessionType to look up the session event. • Since i-spark-authz_${{scala.binary.version}}-${project.version}.jar • The least transitive dependencies needed, which are under ./extensions/spark/kyuubi-spark-authz/target/scala-${scala.binary.version}/jars

Kyuubi is compiled and pre-built against Spark 3 and Scala 2.12 You will probably meet runtime exceptions if you use Spark 2 or Spark with unsupported Scala versions. To install Spark, you need to unpack the session type SQL is refactored to INTERACTIVE, because Kyuubi supports not only SQL session, but also SCALA and PYTHON sessions. User need to use INTERACTIVE sessionType to look up the session event. • Since i-spark-authz_${{scala.binary.version}}-${project.version}.jar • The least transitive dependencies needed, which are under ./extensions/spark/kyuubi-spark-authz/target/scala-${scala.binary.version}/jars

Kyuubi is compiled and pre-built against Spark 3 and Scala 2.12 You will probably meet runtime exceptions if you use Spark 2 or Spark with unsupported Scala versions. To install Spark, you need to unpack the session type SQL is refactored to INTERACTIVE, because Kyuubi supports not only SQL session, but also SCALA and PYTHON sessions. User need to use INTERACTIVE sessionType to look up the session event. • Since i-spark-authz_${{scala.binary.version}}-${project.version}.jar • The least transitive dependencies needed, which are under ./extensions/spark/kyuubi-spark-authz/target/scala-${scala.binary.version}/jars