连接到远程Spark主站-Java / Scala
我Apache Spark
在AWS中创建了一个3节点(1个主节点,2个工作人员)集群。我可以将作业从主服务器提交到群集,但是我无法使其在远程工作。
/* 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: $numBs")
sc.stop()
}
}
我可以从主人那里看到:
Spark Master at spark://ip-171-13-22-125.ec2.internal:7077URL: spark://ip-171-13-22-125.ec2.internal:7077
REST URL: spark://ip-171-13-22-125.ec2.internal:6066 (cluster mode)
因此,当我SimpleApp.scala
从本地计算机执行时,它无法连接到Spark Master
:
2017-02-04 19:59:44,074 INFO [appclient-register-master-threadpool-0] client.StandaloneAppClient$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,我知道如果将master设置为local
,它会起作用,因为那样它将在本地运行。但是,我希望客户端连接到该远程主服务器。我该怎么做?Apache配置外观文件。我什至可以远程登录到该公共DNS和端口,还/etc/hosts
为每个EC2
实例配置了公共DNS和主机名。我希望能够向该远程主服务器提交作业,我还缺少什么?
回答:
要绑定主主机名/ IP,请转到您的spark安装conf目录(spark-2.0.2-bin-hadoop2.7 /
conf),然后使用以下命令创建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,并在下面添加带有主服务器主机名/ IP的行。
SPARK_MASTER_HOST=ec2-54-245-111-320.compute-1.amazonaws.com
使用stop-all.sh和start-all.sh停止并启动Spark。现在您可以使用它来连接远程主机
val spark = SparkSession.builder() .appName("SparkSample")
.master("spark://ec2-54-245-111-320.compute-1.amazonaws.com:7077")
.getOrCreate()
有关设置环境变量的更多信息,请检查http://spark.apache.org/docs/latest/spark-
standalone.html#cluster-launch-
scripts
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