色调：无法访问文件系统根目录

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问题描述

我在Hadoop 2.6.2群集中使用Hue 3.9。电脑都有Ubuntu 14.04。我能够成功安装Hue，但从Web UI查看色调时确实出现了一些错误。我试图一次解决这些问题，所以我真的只关心现在的第一个问题：

  hadoop.hdfs_clusters.default.webhdfs_url当前值：http：// localhost：50070 / webhdfs / v1 
无法访问文件系统根目录

您有两个选择来解决问题：
*授权您的HUE用户使用ACL访问所有HDFS路径（例如，让服务用户拥有HDFS中对象的所有权。
*或更好：确保使用可以通过添加

$ b $来模拟此用户b

 <属性> 
<名称> hadoop.proxyuser.hue.hosts< / name> 
<值> *<< ; /值> 
< / property> 
<属性> 
<名称> hadoop.proxyuser.hue.groups< / name> 
<值> *< ; / value> 
< / property>

到hdfs-site.xml

I'm using Hue 3.9 with a Hadoop 2.6.2 cluster. The computers all have Ubuntu 14.04. I was able to successfully install Hue, but it does appear to have a few errors when viewing hue from the web UI. I'm trying to solve these issues one at a time, so I'm really only concerned with the first issue for right now:

hadoop.hdfs_clusters.default.webhdfs_url    Current value: http://localhost:50070/webhdfs/v1
                                            Failed to access filesystem root

Here is a picture of Hue and the errors associated

I've been looking this error up for a while and I cannot figure out why it fails to access. I'm thinking the solution might show itself in the hue.ini configuration file, but I've yet to find anything of use in the file. I specified the user "hduser" in the file as well and hduser is a member of sudoers on the machine.

Any help is appreciated!

解决方案

HDFS is using ACLs to access the filesystem. If you perform a "HDFS DFS -LS" on your cluster, you will see owners and access rights similar to a Linux file system.

The Hue service is executed with a service user. Per default, this user is called "hue". This can be changed in the hue.ini. Comments on the configuration are self-explanatory. Look for "# Webserver runs as this" user (https://github.com/cloudera/hue/blob/master/desktop/conf.dist/hue.ini

You have two options to solve the problem:* Authorise your HUE user to access all HDFS paths with ACLs (e.g. give the service user ownership over the objects in HDFS.* Or better: Make sure that use can impersonate this users by adding

 <property>
      <name>hadoop.proxyuser.hue.hosts</name>
      <value>*</value>
 </property>
 <property>
      <name>hadoop.proxyuser.hue.groups</name>
      <value>*</value>
 </property>

to hdfs-site.xml

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