[jira] [Created] (HDFS-9296) ShellBasedUnixGroupMapping should support group names with space

["Wei-Chiu Chuang (JIRA)" <ji...@apache.org>]

Wei-Chiu Chuang created HDFS-9296:
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             Summary: ShellBasedUnixGroupMapping should support group names with space
                 Key: HDFS-9296
                 URL: https://issues.apache.org/jira/browse/HDFS-9296
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Wei-Chiu Chuang
            Assignee: Wei-Chiu Chuang


In a typical configuration, group name is obtained from AD through SSSD/LDAP. AD permits group names with space (e.g. "Domain Users").

Unfortunately, the present implementation of ShellBasedUnixGroupMapping parses the output of shell command "id -Gn", and assumes group names are separated by space. 

This could be achieved by using a combination of shell scripts, for example, 

bash -c 'id -G weichiu | tr " " "\n" | xargs -I % getent group "%" | cut -d":" -f1'

But I am still looking for a more compact form, and potentially more efficient one.



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