Hadoop Windows设置。运行WordCountJob时出错：“任何本地目录中都没有可用空间”

Question

我正在关注这个视频教程，尝试在我的机器上设置hadoop。

• How to Install Hadoop on Windows 10

我成功地设置了它：从sbin目录执行start-all.xml时没有错误。

但是当我试图执行我的WordCount.jar文件时出现错误：

2/23 11:42:59 INFO localizer.ResourceLocalizationService: Created localizer for container_1550911199370_0001_02_000001
19/02/23 11:42:59 INFO localizer.ResourceLocalizationService: Localizer failed
org.apache.hadoop.util.DiskChecker$DiskErrorException: No space available in any of the local directories.
        at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:399)
        at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:151)
        at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:132)
        at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:116)
        at org.apache.hadoop.yarn.server.nodemanager.LocalDirsHandlerService.getLocalPathForWrite(LocalDirsHandlerService.java:545)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService$LocalizerRunner.run(ResourceLocalizationService.java:1142)
19/02/23 11:42:59 ERROR nodemanager.DeletionService: Exception during execution of task in DeletionService
java.lang.NullPointerException: path cannot be null
        at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:204)
        at org.apache.hadoop.fs.FileContext.fixRelativePart(FileContext.java:281)
        at org.apache.hadoop.fs.FileContext.delete(FileContext.java:769)
        at org.apache.hadoop.yarn.server.nodemanager.DeletionService$FileDeletionTask.run(DeletionService.java:273)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
19/02/23 11:42:59 INFO container.ContainerImpl: Container container_1550911199370_0001_02_000001 transitioned from LOCAL

我确信我有足够的空间来处理工作。我的系统全新安装：

配置信息：

这是我的配置文件：

核心的site.xml

<configuration>
   <property>
       <name>fs.defaultFS</name>
       <value>hdfs://localhost:9000</value>
   </property>
</configuration>

HDFS-site.xml中

<configuration>
   <property>
       <name>dfs.replication</name>
       <value>1</value>
   </property>
   <property>
       <name>dfs.namenode.name.dir</name>
       <value>file:///C:/hadoop-2.8.0/data/namenode</value>
   </property>
   <property>
       <name>dfs.datanode.data.dir</name>
       <value>file:///C:/hadoop-2.8.0/data/datanode</value>
   </property>
</configuration>

mapred-site.xml中

<configuration>
   <property>
       <name>mapreduce.framework.name</name>
       <value>yarn</value>
   </property>
</configuration>

纱的site.xml

<configuration>
   <property>
        <name>yarn.nodemanager.aux-services</name>
        <value>mapreduce_shuffle</value>
   </property>
   <property>
        <name>yarn.nodemanager.auxservices.mapreduce.shuffle.class</name>  
    <value>org.apache.hadoop.mapred.ShuffleHandler</value>
   </property>
   <property>
   <name>yarn.nodemanager.disk-health-checker.enable</name>
   <value>false</value>
</property>
</configuration>

这是我执行jar的方式（准备输入/输出dirs）：

hadoop fs -mkdir /top
hadoop fs -mkdir /top/input
hadoop fs -mkdir /top/output
hadoop -put C:/hadoop-2.8.0/wordcount2.txt /top/input
hadoop jar C:/hadoop-2.8.0/WordCount.jar /top/input/wordcount2.txt /top/output/output.txt

Answer 1

主要错误是：

org.apache.hadoop.util.DiskChecker $ DiskErrorException：任何本地目录中都没有可用空间。

要解决此问题，您可以尝试：

(1) Change directory format in Hdfs-site.xml

在hdfs-site.xml文件中，尝试替换以下值：

<configuration>
   <property>
       <name>dfs.replication</name>
       <value>1</value>
   </property>
   <property>
       <name>dfs.namenode.name.dir</name>
       <value>file:///C:/hadoop-2.8.0/data/namenode</value>
   </property>
   <property>
       <name>dfs.datanode.data.dir</name>
       <value>file:///C:/hadoop-2.8.0/data/datanode</value>
   </property>
</configuration>

同

<configuration>
   <property>
       <name>dfs.replication</name>
       <value>1</value>
   </property>
   <property>
       <name>dfs.namenode.name.dir</name>
       <value>C:\hadoop-2.8.0\data\namenode</value>
   </property>
   <property>
       <name>dfs.datanode.data.dir</name>
       <value>C:\hadoop-2.8.0\data\datanode</value>
   </property>
</configuration>

(2) Directories read & write permissions

检查当前用户是否具有读取和写入hadoop目录的权限。

(3) Node manager directories

尝试将以下属性添加到yarn-site.xml文件中：

<property>
<name>yarn.nodemanager.local-dirs</name>
<value>C:/hadoop-2.8.0/yarn/local</value>
</property>
<property>
<name>yarn.nodemanager.log-dirs</name>
<value>C:/hadoop-2.8.0/yarn/logs</value>
</property>

---

更改目录后，尝试格式化namenode。

如果它仍然不起作用，您可以参考以下分步指南在Windows上安装Hadoop，它对我来说很好用：

• Step by step Hadoop 2.8.0 installation on Window 10
• How to Run Hadoop wordcount MapReduce Example on Windows 10

Answer 2

尝试格式化您的名称节点和datanode。