Eclipse 导入 Hadoop 源码

1.准备工作

• jdk：
• eclipse：
• Maven：
• libprotoc ：https://developers.google.com/protocol-buffers/
• hadoop:http://www.apache.org/dyn/closer.cgi/hadoop/common/

---

添加开源中国maven库：http://maven.oschina.net/home.html

mavenconfsettings.xml

<localRepository>path</localRepository>

<localRepository>path</localRepository>
<mirrors>
    <mirror>
        <id>nexus-osc</id>
        <mirrorOf>*</mirrorOf>
        <name>Nexus osc</name>
        <url>http://maven.oschina.net/content/groups/public/</url>
    </mirror>
</mirrors>

2.导入

1. 将hadoop源码解压到一个目录，注意目录层次不要太深，否则可能无法解压。
2. 进入hadoop-maven-plugins文件夹，执行 mvn install 
3. 返回源码根目录，执行 mvn eclipse:eclipse –DskipTests 
4. eclipse在任意目录创建新的WorkSpace
5. eclipse设置Maven：window->preference->maven->{Installations...;user Settings：mavenconfsettings.xml}
6. eclipse：File->inport->Existing Projects into WorkSpace->Hadoop源码根目录

3.错误处理

1. maven下载pom失败->重新操作
2. hadoop-streaming中build path错误->Java Build Path->Source:
   1. 删除...hadoop-yarn-server-resourcemanager/conf
   2. Link Source:源码根目录/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/conf，再随便起个名字；inclusion patterns：capacity-scheduler.xml；exclusion patters：**/*.java
3. org.apache.hadoop.io.serializer.avro.TestAvroSerialization
   
   1. 下载avro-tools-1.7.4.jar：http://archive.apache.org/dist/avro/avro-1.7.4/java/
   2. 进入目录：源码根目录hadoop-common-projecthadoop-commonsrc estavro
   3. java -jar path/to/avro-tools-1.7.4.jar compile schema avroRecord.avsc ..java
   4. eclipse 刷新
4. org.apache.hadoop.ipc.protobuf.TestProtos
   
   1. 进入目录：源码根目录hadoop-common-projecthadoop-commonsrc estproto
   2. protoc --java_out=../java *.proto
   3. eclipse 刷新
5. project->clean..->clean all projects & Build the entire workspace