snaillup 2019-07-01
在配置spark环境的时候出现两个问题:
<?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>com.spark.zwh</groupId> <artifactId>spark-test</artifactId> <version>1.0-SNAPSHOT</version> <properties> <spark.version>2.4.0</spark.version> <scala.version>2.11</scala.version> </properties> <dependencies> <dependency> <groupId>org.apache.spark</groupId> <artifactId>spark-core_${scala.version}</artifactId> <version>${spark.version}</version> </dependency> <dependency> <groupId>org.apache.spark</groupId> <artifactId>spark-streaming_${scala.version}</artifactId> <version>${spark.version}</version> </dependency> <dependency> <groupId>org.apache.spark</groupId> <artifactId>spark-sql_${scala.version}</artifactId> <version>${spark.version}</version> </dependency> <dependency> <groupId>org.apache.spark</groupId> <artifactId>spark-hive_${scala.version}</artifactId> <version>${spark.version}</version> </dependency> <dependency> <groupId>org.apache.spark</groupId> <artifactId>spark-mllib_${scala.version}</artifactId> <version>${spark.version}</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.scala-tools</groupId> <artifactId>maven-scala-plugin</artifactId> <version>2.15.2</version> <executions> <execution> <goals> <goal>compile</goal> <goal>testCompile</goal> </goals> </execution> </executions> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.6.0</version> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <version>2.19</version> <configuration> <skip>true</skip> </configuration> </plugin> </plugins> </build>
</project>
其中<spark.version>2.4.0</spark.version>
<scala.version>2.11</scala.version>
在http://spark.apache.org/downl...:
groupId: org.apache.spark
artifactId: spark-core_2.11
version: 2.4.0
其中2.11为scala版本,2.4.0为spark版本,只有相互对应的版本才能正确编译,否则会出现各种奇怪问题。
右键项目-》add frameworks support->scala->ok。现在有scala class选项了。