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https://issues.apache.org/jira/browse/HADOOP-15167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16324785#comment-16324785
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Ajay Kumar commented on HADOOP-15167:
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Personally i think if group can't be determined than its better to keep it
blank. There might be valid business scenarios where some operations might be
done based on users group. Having no group at all is a valid case in that.
Welcome any comments/suggestions from others.
> [viewfs] ls will fail when user doesn't exist
> ---------------------------------------------
>
> Key: HADOOP-15167
> URL: https://issues.apache.org/jira/browse/HADOOP-15167
> Project: Hadoop Common
> Issue Type: Bug
> Components: viewfs
> Affects Versions: 2.7.0
> Reporter: Brahma Reddy Battula
> Assignee: Brahma Reddy Battula
> Attachments: HADOOP-15167.patch
>
>
> Have Secure federated cluster with atleast two nameservices
> Configure viewfs related configs
> When we run the {{ls}} cmd in HDFS client ,we will call the method:
> org.apache.hadoop.fs.viewfs.ViewFileSystem.InternalDirOfViewFs#getFileStatus
> it will try to get the group of the kerberos user. If the node has not this
> user, it fails.
> Throws the following and exits.UserGroupInformation#getPrimaryGroupName
> {code}
> if (groups.isEmpty()) {
> throw new IOException("There is no primary group for UGI " + this);
> }
> {code}
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