[jira] [Commented] (HIVE-13532) Mapjoin should set realuser's username

[feiwei (JIRA)]

    [ 
https://issues.apache.org/jira/browse/HIVE-13532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16128399#comment-16128399
 ] 

feiwei commented on HIVE-13532:
-------------------------------

you can do this in MapredLocalTask.java

      UserGroupInformation ug = Utils.getUGI().getRealUser();
      String endUserName = "";
      if(ug == null){
          endUserName = Utils.getUGI().getShortUserName();
      }
      else{
          endUserName = ug.getShortUserName();
      }


or 

String endUserName = "";
UserGroupInformation ug1 = Utils.getUGI();
      if (ug1.getAuthenticationMethod().equals(AuthenticationMethod.PROXY)){
          endUserName = ug.getRealUser().getShortUserName();
      }
      else{
          endUserName = ug.getShortUserName();
      }

because when  getAuthenticationMethod() return is not PROXY, getRealUser() will 
return null.

> Mapjoin should set realuser's username
> --------------------------------------
>
>                 Key: HIVE-13532
>                 URL: https://issues.apache.org/jira/browse/HIVE-13532
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 1.1.0
>         Environment: HADOOP_PROXY_USER is set.
>            Reporter: Zhiwen Sun
>
> Map join set HADOOP_USER_NAME should be realuser's username.
> Current, hive set HADOOP_USER_NAME env for mapjoin local process according:
> {quote}
>    String endUserName = Utils.getUGI().getShortUserName();
> {quote}
> suppose set HADOOP_PROXY_USER=abc in shell.
> map join local job will have following env:
> {quote}
> HADOOP_USER_NAME=abc
> HADOOP_PROXY_NAME=abc
> {quote}
> this will cause such exception:
> {quote}
> java.io.IOException: 
> org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.authorize.AuthorizationException):
>  User: abc is not allowed to impersonate 
> {quote}
> I think we should set HADOOP_USER_NAME to realuser:
> {quote}
>    String endUserName = Utils.getUGI().getRealUser().getShortUserName();
> {quote}



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