Hadoop没有看到输入文件夹 [英] Hadoop does not see the input folder

问题描述

我试图在Ubuntu Server 14.04.3 LTS上安装hadoop 2.7.1（独立模式）。继主要的apache教程（ https：// hadoop .apache.org / docs / stable / hadoop-project-dist / hadoop-common / SingleCluster.html ），我可以启动该进程并在端口50070看到dfshealth.html＃tab-datanode。但我可以超越这一点不会超越。我被困在：将输入文件复制到分布式文件系统：（$ bin / hdfs dfs -put etc / hadoop input）该文件在那里，但我收到以下异常：

I'm trying to install hadoop 2.7.1 (standalone mode) on Ubuntu Server 14.04.3 LTS. Following the main apache tutorial (https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-common/SingleCluster.html), I can start the process and see the dfshealth.html#tab-datanode at port 50070. But I can't go through beyond that point. I'm stuck on: "Copy the input files into the distributed filesystem:" ($ bin/hdfs dfs -put etc/hadoop input) The file is there but I'm getting the following exception:

joao @ vmdeb20：〜/ hadoop2_7_1 / hadoop-2.7.1 $ bin / hdfs dfs -put input
$ b $ put：`。'：No这样的文件或目录

joao@vmdeb20:~/hadoop2_7_1/hadoop-2.7.1$ bin/hdfs dfs -put input
put: `.': No such file or directory

推荐答案

这是因为没有找到用户目录。如果未指定输出目录，Hadoop将默认复制输入到用户目录 / user / username 。

This is because the user directory not found. Hadoop will copy the input into the user directory /user/username by default if the output directory does not specified.

创建用户目录在Hadoop中或使用以下命令复制文件

Either create a user directory in Hadoop or copy the file using below command

bin/hdfs dfs -put input /

上述命令将输入​​目录复制到HDFS的根目录（ / ）。

The above command will copy the input directory into root (/) of HDFS.

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