如何使用MVN構建hortonworks/simple-yarn-app

Question

我是Hadoop的新手。最近我正在研究Hadoop2.6.0（Yarn）。現在，我想學習一個簡單的紗線應用程序。我發現this simple yarn app。 但可悲的是，當我運行mvn package，它顯示了這樣的錯誤：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.0.2:compile (default-compile) on project simple-yarn-app: Compilation failure: Compilation failure: 
[ERROR] /home/user/simple-yarn-app/src/main/java/com/hortonworks/simpleyarnapp/ApplicationMaster.java:[30,14] error: generics are not supported in -source 1.3 
[ERROR] 
[ERROR] (use -source 5 or higher to enable generics) 
[ERROR] /home/user/simple-yarn-app/src/main/java/com/hortonworks/simpleyarnapp/ApplicationMaster.java:[64,33] error: enhanced for loops are not supported in -source 1.3 
[ERROR] 
[ERROR] (use -source 5 or higher to enable for-each loops) 
[ERROR] /home/user/simple-yarn-app/src/main/java/com/hortonworks/simpleyarnapp/Client.java:[72,7] error: generics are not supported in -source 1.3 
[ERROR] 
[ERROR] (use -source 5 or higher to enable generics) 
[ERROR] /home/user/simple-yarn-app/src/main/java/com/hortonworks/simpleyarnapp/Client.java:[121,18] error: enhanced for loops are not supported in -source 1.3 
[ERROR] 
[ERROR] (use -source 5 or higher to enable for-each loops) 
[ERROR] /home/user/simple-yarn-app/src/main/java/com/hortonworks/simpleyarnapp/ApplicationMasterAsync.java:[35,42] error: generics are not supported in -source 1.3 
[ERROR] 
[ERROR] (use -source 5 or higher to enable generics) 
[ERROR] /home/user/simple-yarn-app/src/main/java/com/hortonworks/simpleyarnapp/ApplicationMasterAsync.java:[36,33] error: enhanced for loops are not supported in -source 1.3 

而我MVN的版本是：

Apache Maven 3.0.5 
Maven home: /usr/share/maven 
Java version: 1.8.0_31, vendor: Oracle Corporation 
Java home: /usr/lib/jvm/jdk1.8.0_31/jre 
Default locale: en_US, platform encoding: UTF-8 
OS name: "linux", version: "3.13.0-45-generic", arch: "amd64", family: "unix" 

的pom.xml的是在這裏：

<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/maven-v4_0_0.xsd"> 
    <modelVersion>4.0.0</modelVersion> 
    <groupId>com.hortonworks</groupId> 
    <artifactId>simple-yarn-app</artifactId> 
    <version>1.1.0</version> 
    <name>simple-yarn-app</name> 

    <url>https://github.com/hortonworks/simple-yarn-app</url> 

    <dependencies> 
    <dependency> 
     <groupId>org.apache.hadoop</groupId> 
     <artifactId>hadoop-yarn-client</artifactId> 
     <version>2.6.0</version> 
    </dependency> 
    <dependency> 
     <groupId>org.apache.hadoop</groupId> 
     <artifactId>hadoop-common</artifactId> 
     <version>2.6.0</version> 
    </dependency> 
    </dependencies> 
</project> 

我該如何解決這個問題？

Answer 1

最後，我找到了解決辦法。構建錯誤是由於maven泛型，這是一個流行的谷歌搜索問題。 你需要添加到您的pom.xml：

<project ...> 
 
    <dependencies> 
 
    ... 
 
    </dependencies> 
 
    <build> 
 
    <plugins> 
 
     <plugin> 
 
      <groupId>org.apache.maven.plugins</groupId> 
 
      <artifactId>maven-compiler-plugin</artifactId> 
 
      <version>2.3.1</version> 
 
      <configuration> 
 
       <source>1.5</source> 
 
       <target>1.5</target> 
 
      </configuration> 
 
     </plugin> 
 
    </plugins> 
 
    </build> 
 
</project>

這裏是一個鏈接：maven generics

謝謝！