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https://issues.apache.org/jira/browse/HDFS-16756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17600567#comment-17600567
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ASF GitHub Bot commented on HDFS-16756:
---------------------------------------

hadoop-yetus commented on PR #4853:
URL: https://github.com/apache/hadoop/pull/4853#issuecomment-1237627230

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
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   | modules | C: hadoop-hdfs-project/hadoop-hdfs-rbf U: 
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   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
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> RBF proxies the client's user by the login user to enable CacheEntry
> --------------------------------------------------------------------
>
>                 Key: HDFS-16756
>                 URL: https://issues.apache.org/jira/browse/HDFS-16756
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: ZanderXu
>            Assignee: ZanderXu
>            Priority: Major
>              Labels: pull-request-available
>
> RBF just proxies the client's user by the login user for Kerberos 
> authentication. If the cluster uses the SIMPLE authentication method, the RBF 
> will not proxies the client's user by the login user, the downstream 
> namespace will not use the real clientIp, clientPort, clientId and callId 
> even if the namenode configured dfs.namenode.ip-proxy-users.
>  
> And the related code as bellow:
> {code:java}
> UserGroupInformation connUGI = ugi;
> if (UserGroupInformation.isSecurityEnabled()) {
>   UserGroupInformation routerUser = UserGroupInformation.getLoginUser();
>   connUGI = UserGroupInformation.createProxyUser(
>       ugi.getUserName(), routerUser);
> } {code}



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