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https://issues.apache.org/jira/browse/FLINK-3929?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15395805#comment-15395805
 ] 

ASF GitHub Bot commented on FLINK-3929:
---------------------------------------

Github user mxm commented on a diff in the pull request:

    https://github.com/apache/flink/pull/2275#discussion_r72456165
  
    --- Diff: 
flink-yarn/src/main/java/org/apache/flink/yarn/YarnApplicationMasterRunner.java 
---
    @@ -125,29 +124,35 @@ protected int run(String[] args) {
                try {
                        LOG.debug("All environment variables: {}", ENV);
     
    -                   final String yarnClientUsername = 
ENV.get(YarnConfigKeys.ENV_CLIENT_USERNAME);
    +                   final String yarnClientUsername = 
ENV.get(YarnConfigKeys.ENV_HADOOP_USER_NAME);
                        require(yarnClientUsername != null, "YARN client user 
name environment variable {} not set",
    -                           YarnConfigKeys.ENV_CLIENT_USERNAME);
    +                           YarnConfigKeys.ENV_HADOOP_USER_NAME);
     
    -                   final UserGroupInformation currentUser;
    -                   try {
    -                           currentUser = 
UserGroupInformation.getCurrentUser();
    -                   } catch (Throwable t) {
    -                           throw new Exception("Cannot access 
UserGroupInformation information for current user", t);
    -                   }
    +                   final String currDir = ENV.get(Environment.PWD.key());
    +                   require(currDir != null, "Current working directory 
variable (%s) not set", Environment.PWD.key());
    +                   LOG.debug("Current working Directory: {}", currDir);
     
    -                   LOG.info("YARN daemon runs as user {}. Running Flink 
Application Master/JobManager as user {}",
    --- End diff --
    
    Could we keep this log output which prints out the user?


> Support for Kerberos Authentication with Keytab Credential
> ----------------------------------------------------------
>
>                 Key: FLINK-3929
>                 URL: https://issues.apache.org/jira/browse/FLINK-3929
>             Project: Flink
>          Issue Type: New Feature
>            Reporter: Eron Wright 
>            Assignee: Vijay Srinivasaraghavan
>              Labels: kerberos, security
>   Original Estimate: 672h
>  Remaining Estimate: 672h
>
> _This issue is part of a series of improvements detailed in the [Secure Data 
> Access|https://docs.google.com/document/d/1-GQB6uVOyoaXGwtqwqLV8BHDxWiMO2WnVzBoJ8oPaAs/edit?usp=sharing]
>  design doc._
> Add support for a keytab credential to be associated with the Flink cluster, 
> to facilitate:
> - Kerberos-authenticated data access for connectors
> - Kerberos-authenticated ZooKeeper access
> Support both the standalone and YARN deployment modes.
>  



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