Dataproc集群中的Scala Spark作业返回java.util.NoSuchElementException:None.get
我得到了错误Dataproc集群中的Scala Spark作业返回java.util.NoSuchElementException:None.get,scala,apache-spark,google-cloud-dataproc,Scala,Apache Spark,Google Cloud Dataproc,我得到了错误 ERROR org.apache.spark.executor.Executor: Exception in task 0.0 in stage 0.0 (TID 0) java.util.NoSuchElementException: None.get 当我使用Dataproc集群运行我的作业时,当我在本地运行它时,它运行得非常好。我使用下面的玩具示例重新创建了这个问题 package com.deequ_unit_tests import org.apache.log4j.
ERROR org.apache.spark.executor.Executor: Exception in task 0.0 in stage 0.0 (TID 0)
java.util.NoSuchElementException: None.get
当我使用Dataproc集群运行我的作业时,当我在本地运行它时,它运行得非常好。我使用下面的玩具示例重新创建了这个问题
package com.deequ_unit_tests
import org.apache.log4j.{Level, Logger}
import org.apache.spark.sql.SparkSession
object reduce_by_key_example {def main(args: Array[String]): Unit = {
// Set the log level to only print errors
Logger.getLogger("org").setLevel(Level.ERROR)
val spark: SparkSession = SparkSession.builder()
.master("local[1]")
.appName("SparkByExamples.com")
.getOrCreate()
println("Step 1")
val data = Seq(("Project", 1),
("Gutenberg’s", 1),
("Alice’s", 1),
("Adventures", 1),
("in", 1),
("Wonderland", 1),
("Project", 1),
("Gutenberg’s", 1),
("Adventures", 1),
("in", 1),
("Wonderland", 1),
("Project", 1),
("Gutenberg’s", 1))
println("Step 2")
val rdd = spark.sparkContext.parallelize(data)
println("Step 3")
val rdd2 = rdd.reduceByKey(_ + _)
println("Step 4")
rdd2.foreach(println)
}
}
在Dataproc中运行此作业时,在执行该行时会出现此错误
rdd2.foreach(println)
作为补充信息,我必须说,在我公司的Dataproc集群中应用了一些更改之前,我没有收到这个错误。对于使用PySpark的同事,使用上面示例的PySpark中的等效版本,更改
sc = SparkContext('local')
到
我做到了,但在Spark Scala中找不到等效的解决方案。你知道是什么导致了这个问题吗?欢迎任何帮助
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>stackOverFlowGcp</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-core_2.11</artifactId>
<version>2.2.3</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-sql_2.11</artifactId>
<version>2.2.3</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.typesafe</groupId>
<artifactId>config</artifactId>
<version>1.4.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<!-- Maven Plugin -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>8</source>
<target>8</target>
</configuration>
</plugin>
<!-- assembly Maven Plugin -->
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>mainPackage.mainObject</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
不要忘记关闭集群或在完成后将其删除;) 创建spark会话时不要设置master,SparkSession.builder().appName(“SparkByExamples.com”).getOrCreate()它适用于玩具示例(但在rdd2.foreach(println)时不打印)。尽管如此,在我正在处理的实际案例中,没有添加master会使流程在中断之前返回此错误。master added:WARN org.apache.spark.scheduler.TaskSetManager:0.0阶段中丢失的任务0.0(TID 0,dataproc-managed-w-91.c.wf-gcp-us-ae-dataproc-prod.internal,executor 2):java.io.InvalidClassException:com.google.cloud.spark.bigquery.SparkBigQueryConfig;本地类不兼容:stream classdesc serialVersionUID=2964184825620630609,本地类serialVersionUID=-3988734315685039601由于不进行转换就无法打印rdd行(rdd的不变性),只需兼容地检查不同的版本,我还有一个问题,您是在VM dataproc上运行齐柏林飞艇笔记本上的代码,还是使用jar?玩具示例取自这里。少了什么吗?它可以在本地完美运行并打印所需的输出。无论如何,这个例子只是为了说明我所面临的问题。我不明白你所说的本地(在你的机器中)是什么意思。在dataproc中,你能分享你的代码吗!
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>stackOverFlowGcp</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-core_2.11</artifactId>
<version>2.2.3</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-sql_2.11</artifactId>
<version>2.2.3</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.typesafe</groupId>
<artifactId>config</artifactId>
<version>1.4.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<!-- Maven Plugin -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>8</source>
<target>8</target>
</configuration>
</plugin>
<!-- assembly Maven Plugin -->
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>mainPackage.mainObject</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
package mainPackage
import org.apache.spark.sql.SparkSession
object mainObject {
def main(args: Array[String]): Unit = {
val spark: SparkSession = SparkSession.builder()
//.master("local[*]")
.appName("SparkByExamples")
.getOrCreate()
spark.sparkContext.setLogLevel("ERROR")
println("Step 1")
val data = Seq(("Project", 1),
("Gutenberg’s", 1),
("Alice’s", 1),
("Adventures", 1),
("in", 1),
("Wonderland", 1),
("Project", 1),
("Gutenberg’s", 1),
("Adventures", 1),
("in", 1),
("Wonderland", 1),
("Project", 1),
("Gutenberg’s", 1))
println("Step 2")
val rdd = spark.sparkContext.parallelize(data)
println("Step 3")
val rdd2 = rdd.reduceByKey(_ + _)
println("Step 4")
rdd2.foreach(println)
}
}