Windows搭建HDFS 2.6.0(附加搭建Hadoop)

1. 环境

• 操作系统: Windows 7
• JDK版本: 1.8.0_221
• Hadoop版本: 2.6.0

2. 下载

Hadoop官网下载

image.png

image.png

3. 前期准备

3.1. 配置JAVA环境变量

image.png

image.png

4. 安装部署

4.1. 解压，提示报有错误发生不影响

image.png

4.2. 更改配置文件

• hadoop-env.cmd - 添加JAVA_HOME环境变量

排坑: Windows环境下，配置文件中Program Files中存在空格，会造成引用失败，使用PROGRA~1替换Program Files。
解决办法详见: Windows格式化namenode报错 - Error: JAVA_HOME is incorrectly set. Please update F:\hadoop\conf\hadoop-e...

set JAVA_HOME=C:\PROGRA~1\Java\jdk1.8.0_221

• .\etc\hadoop\core-site.xml

排坑: Windows下URI路径前要加/，例如:/E:/soft_work/hadoop-2.6.0/data/hdfs
解决办法详见: Windows格式化namenode报错 - ERROR namenode.NameNode: Failed to start namenode.

  
    fs.defaultFS
    hdfs://127.0.0.1:8020
  
  
    hadoop.tmp.dir
    /E:/soft_work/hadoop-2.6.0/data/hdfs
  

• .\etc\hadoop\hdfs-site.xml

  
    dfs.replication
    1
  

4.3. 格式化namenode

.\bin\hdfs.cmd namenode -format

下面是成功信息，出现 has been successfully formatted.

2020-10-14 13:10:51,919 INFO common.Storage: Storage directory E:\soft_work\hado
op-2.6.0\data\hdfs\dfs\name has been successfully formatted.
2020-10-14 13:10:51,930 INFO namenode.FSImageFormatProtobuf: Saving image file E
:\soft_work\hadoop-2.6.0\data\hdfs\dfs\name\current\fsimage.ckpt_000000000000000
0000 using no compression
2020-10-14 13:10:52,043 INFO namenode.FSImageFormatProtobuf: Image file E:\soft_
work\hadoop-2.6.0\data\hdfs\dfs\name\current\fsimage.ckpt_0000000000000000000 of
 size 389 bytes saved in 0 seconds.
2020-10-14 13:10:52,060 INFO namenode.NNStorageRetentionManager: Going to retain
 1 images with txid >= 0
2020-10-14 13:10:52,066 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at jfp/172.18.16.29
************************************************************/

4.4. 启动HDFS

.\sbin\start-dfs.cmd

排坑: 启动hdfs时出现找不到文件hadoop
解决办法详见: Windows启动HDFS报错 - 系统找不到文件 hadoop。
报错信息如下:

image.png

排坑: 启动报错Could not locate Hadoop executable: E:\soft_work\hadoop-2.6.0\bin\winutils.exe
解决办法详见: Windows启动HDFS报错 - Could not locate Hadoop executable: E:\soft_work\hadoop-2.6.0\bin\winutils.exe
报错信息如下:

Caused by: java.io.FileNotFoundException: Could not locate Hadoop executable: E:\soft_work\hadoop-2.6.0\bin\winutils.exe
        at org.apache.hadoop.util.Shell.getQualifiedBinInner(Shell.java:605)
        at org.apache.hadoop.util.Shell.getQualifiedBin(Shell.java:578)
        at org.apache.hadoop.util.Shell.(Shell.java:675)
        at org.apache.hadoop.util.StringUtils.(StringUtils.java:78)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:2871)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:2896)

排坑: 启动报错org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Ljava/lang/String;I)Z
解决办法详见: Windows启动HDFS报错 - org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Ljava/lang/String;I)Z
报错信息如下:

2020-10-14 13:33:09,920 ERROR namenode.NameNode: Failed to start namenode.
java.lang.UnsatisfiedLinkError: org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Ljava/lang/String;I)Z
        at org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Native Method)
        at org.apache.hadoop.io.nativeio.NativeIO$Windows.access(NativeIO.java:606)
        at org.apache.hadoop.fs.FileUtil.canWrite(FileUtil.java:971)
        at org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.analyzeStorage(Storage.java:613)
        at org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.analyzeStorage(Storage.java:573)
        at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverStorageDirs(FSImage.java:365)
        at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:221)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:1072)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:704)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:665)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:727)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.(NameNode.java:950)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.(NameNode.java:929)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1653)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1720)

• 排坑之后 启动完成 namenode 和 datanode 均启动成功

image.png

4.5. 查看UI界面 启动成功

http://localhost:9870/

image.png

5. 拓展

5.1 通过jps查看 namenode 和 datanode进程

Windows环境需要特殊配置，详见: Windows中jps命令无法查看java进程问题

C:\Users\user>jps
5968 Jps
6776 NameNode
9816 DataNode

6. 安装启动HADOOP

如果想同时启动HDFS，Yarn，MapReduce，执行以下步骤：

6.1修改配置文件

• .\etc\hadoop\yarn-site.xml

  
    yarn.nodemanager.aux-services
    mapreduce_shuffle
  
  
    yarn.resourcemanager.hostname
    localhost
  

• .\etc\hadoop\mapred-site.xml

  
    mapreduce.framework.name
    yarn
  

6.2 启动全部

.\sbin\start-all.cmd

6.3 查看启动进程

启动成功

C:\Users\user>jps
10096 NodeManager
10304 Jps
11240 NameNode
14856 ResourceManager
12892 DataNode

6.4 查看yarn Web-UI

http://localhost:8088

image.png