java - SparkSession 初始化抛出 ExceptionInInitializerError
问题描述
我正在尝试运行一个简单的 Spark Structured Streaming 作业,但在调用时出现getOrCreate()
错误SparkSession
...
我创建SparkSession
这样的:
SparkSession spark = SparkSession
.builder()
.appName("CountryCount")
.master("local[*]")
.getOrCreate();
使用这个pom.xml
:
<?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">
<artifactId>spark-streaming</artifactId>
<version>1.0</version>
<packaging>jar</packaging>
<properties>
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
<spark.version>3.0.0</spark.version>
<mvn-shade.version>3.2.4</mvn-shade.version>
<slf4j.version>1.7.30</slf4j.version>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>${mvn-shade.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-log4j12 -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.spark/spark-core -->
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-core_2.12</artifactId>
<version>${spark.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.spark/spark-streaming -->
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-streaming_2.12</artifactId>
<version>${spark.version}</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.spark/spark-sql -->
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-sql_2.12</artifactId>
<version>${spark.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.spark/spark-streaming-kafka-0-10 -->
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-streaming-kafka-0-10_2.12</artifactId>
<version>${spark.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>${mvn-shade.version}</version>
<executions>
<execution>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
但是,我得到以下异常:
Exception in thread "main" java.lang.ExceptionInInitializerError
at org.apache.spark.storage.BlockManagerMasterEndpoint.<init>(BlockManagerMasterEndpoint.scala:93)
at org.apache.spark.SparkEnv$.$anonfun$create$9(SparkEnv.scala:370)
at org.apache.spark.SparkEnv$.registerOrLookupEndpoint$1(SparkEnv.scala:311)
at org.apache.spark.SparkEnv$.create(SparkEnv.scala:359)
at org.apache.spark.SparkEnv$.createDriverEnv(SparkEnv.scala:189)
at org.apache.spark.SparkContext.createSparkEnv(SparkContext.scala:267)
at org.apache.spark.SparkContext.<init>(SparkContext.scala:442)
at org.apache.spark.SparkContext$.getOrCreate(SparkContext.scala:2555)
at org.apache.spark.sql.SparkSession$Builder.$anonfun$getOrCreate$1(SparkSession.scala:930)
at scala.Option.getOrElse(Option.scala:189)
at org.apache.spark.sql.SparkSession$Builder.getOrCreate(SparkSession.scala:921)
at JobCountryCount.createJob(JobCountryCount.java:43)
at JobCountryCount.<init>(JobCountryCount.java:27)
at JobCountryCount.main(JobCountryCount.java:21)
Caused by: java.lang.NullPointerException
at org.apache.commons.lang3.SystemUtils.isJavaVersionAtLeast(SystemUtils.java:1654)
at org.apache.spark.storage.StorageUtils$.<init>(StorageUtils.scala:207)
at org.apache.spark.storage.StorageUtils$.<clinit>(StorageUtils.scala)
... 14 more
先感谢您!
解决方案
看起来您的类路径上的 Apache commons-lang 库版本低于 3.8,不支持 JDK11。请参阅https://issues.apache.org/jira/browse/LANG-1384。
由于 Apache Spark 3.0.0 使用的是3.9,我的预感是您的环境可能也有旧的 Spark(或 Hadoop)版本。您可以打印classOf[org.apache.commons.lang3.SystemUtils].getResource("SystemUtils.class")
您的代码。它会告诉你这个类是从哪里来的。
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