连接到远程Spark Master-Java/Scala

Question

/* SimpleApp.scala */
import org.apache.spark.SparkContext
import org.apache.spark.SparkContext._
import org.apache.spark.SparkConf

object SimpleApp {
  def main(args: Array[String]) {
    val logFile = "/usr/local/spark/README.md" // Should be some file on your system
    val conf = new SparkConf().setAppName("Simple Application").setMaster("spark://ec2-54-245-111-320.compute-1.amazonaws.com:7077")
    val sc = new SparkContext(conf)
    val logData = sc.textFile(logFile, 2).cache()
    val numAs = logData.filter(line => line.contains("a")).count()
    val numBs = logData.filter(line => line.contains("b")).count()
    println(s"Lines with a: $numAs, Lines with b: $numBs")
    sc.stop()
  }
}

Spark Master at spark://ip-171-13-22-125.ec2.internal:7077
URL: spark://ip-171-13-22-125.ec2.internal:7077
REST URL: spark://ip-171-13-22-125.ec2.internal:6066 (cluster mode)

因此，当我从本地计算机执行simpleapp.scala时，它无法连接到spark master:

2017-02-04 19:59:44,074 INFO  [appclient-register-master-threadpool-0] client.StandaloneAppClient$ClientEndpoint (Logging.scala:54)  [] - Connecting to master spark://ec2-54-245-111-320.compute-1.amazonaws.com:7077...
2017-02-04 19:59:44,166 WARN  [appclient-register-master-threadpool-0] client.StandaloneAppClient$ClientEndpoint (Logging.scala:87)  [] - Failed to connect to spark://ec2-54-245-111-320.compute-1.amazonaws.com:7077
org.apache.spark.SparkException: Exception thrown in awaitResult
    at org.apache.spark.rpc.RpcTimeout$$anonfun$1.applyOrElse(RpcTimeout.scala:77) ~[spark-core_2.10-2.0.2.jar:2.0.2]
    at org.apache.spark.rpc.RpcTimeout$$anonfun$1.applyOrElse(RpcTimeout.scala:75) ~[spark-core_2.10-2.0.2.jar:2.0.2]
    at scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:33) ~[scala-library-2.10.0.jar:?]
    at org.apache.spark.rpc.RpcTimeout$$anonfun$addMessageIfTimeout$1.applyOrElse(RpcTimeout.scala:59) ~[spark-core_2.10-2.0.2.jar:2.0.2]

但是，我知道如果我将主程序设置为local，它就会起作用，因为这样它就会在本地运行。但是，我想让我的客户端连接到这个远程主机。我怎么才能做到？Apache配置看起来是文件。我甚至可以远程登录到该公共DNS和端口，我还为每个EC2实例配置了/etc/hosts公共DNS和主机名。我希望能够向这个远程主机提交作业，我错过了什么？

Answer 1

要绑定主主机名/IP，请转到spark安装conf目录(spark-2.0.2-bin-hadoop2.7/conf)，并使用以下命令创建spark-env.sh文件。

cp spark-env.sh.template spark-env.sh

在vi编辑器中打开spark-env.sh文件，并在下面添加主机名/ip。

SPARK_MASTER_HOST=ec2-54-245-111-320.compute-1.amazonaws.com

使用stop-all.sh和start-all.sh停止和启动Spark。现在您可以使用它连接远程主机，使用

val spark = SparkSession.builder()
  .appName("SparkSample")
  .master("spark://ec2-54-245-111-320.compute-1.amazonaws.com:7077")
  .getOrCreate()