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我是Spark的新手,我試圖從我的應用程序提交「快速啓動」作業。我嘗試通過在本地主機上啓動master和slave來模擬獨立模式。Spark獨立模式:以編程方式提交作業
object SimpleApp {
def main(args: Array[String]): Unit = {
val logFile = "/opt/spark-2.0.0-bin-hadoop2.7/README.md"
val conf = new SparkConf().setAppName("SimpleApp")
conf.setMaster("spark://10.49.30.77:7077")
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("Lines with a: %s , lines with b: %s".format(numAs,numBs))
}
}
我在我的IDE(IntelliJ)中運行我的Spark應用程序。
看着日誌(在workernode中的日誌),看起來spark沒有找到job class。
16/09/15 17:50:58 INFO MemoryStore: Block broadcast_1_piece0 stored as bytes in memory (estimated size 1912.0 B, free 366.3 MB)
16/09/15 17:50:58 INFO TorrentBroadcast: Reading broadcast variable 1 took 137 ms
16/09/15 17:50:58 INFO MemoryStore: Block broadcast_1 stored as values in memory (estimated size 3.1 KB, free 366.3 MB)
16/09/15 17:50:58 ERROR Executor: Exception in task 0.0 in stage 0.0 (TID 0)
java.lang.ClassNotFoundException: SimpleApp$$anonfun$1
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:270)
1.這是否意味着作業資源(類)不會傳輸到從節點?
2.對於獨立模式,我必須使用「spark-submit」CLI提交作業?如果是這樣,如何從應用程序提交火花作業(例如web應用程序)
3.也是無關的問題:我在日誌中看到,DriverProgram啓動一個服務器(端口4040)。這是什麼目的? DriveProgram是客戶端,它爲什麼啓動這項服務?
16/09/15 17:50:52 INFO SparkEnv: Registering OutputCommitCoordinator
16/09/15 17:50:53 INFO Utils: Successfully started service 'SparkUI' on port 4040.
16/09/15 17:50:53 INFO SparkUI: Bound SparkUI to 0.0.0.0, and started at http://10.49.30.77:4040