Hadoop无法连接到Map/Reduce位置: localhost

Question

我正在尝试创建新的DFSLocation，但无法连接

下面是错误消息。请有人推荐我。

“无法连接到映射/还原位置:对localhost /127.0.0.1的localhost调用失败:连接异常: java.net.ConnectException:连接被拒绝:没有更多信息”

Answer 1

朋友们，我是Rahul Tyagi，我也遇到了同样的问题。

$ vim /usr/local/hadoop/etc/hadoop/core-site.xml

打开终端并粘贴给定的地址。将打开属性文件夹，然后添加：

<property>
    <name>hadoop.tmp.dir</name>
    <value>/app/hadoop/tmp</value>
    <description>A base for other temporary directories.</description>
</property>

<property>
    <name>fs.default.name</name>
    <value>hdfs://localhost:54310</value>
    <description>
       The name of the default file system.  A URI whose
       scheme and authority determine the FileSystem implementation.  
       The uri's scheme determines the config property (fs.SCHEME.impl) 
       naming the FileSystem implementation class.  The uri's
       authority is used to determine the host, port, etc.
       for a filesystem.
    </description>
</property>

现在第二步：

$ vim /usr/local/hadoop/etc/hadoop/mapred-site.xml

<property>
    <name>mapred.job.tracker</name>
    <value>localhost:54311</value>
    <description>The host and port that the MapReduce job tracker runs
            at.  If "local", then jobs are run in-process as a single map
            and reduce task.
    </description>
</property>

就这样。