[jira] [Created] (HDFS-9511) When rmadmin/dfsadmin -refreshUserToGroupsMappings, it does not reload hadoop.user.group.static.mapping.overrides config.

[KWON BYUNGCHANG (JIRA)]

KWON BYUNGCHANG created HDFS-9511:
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             Summary: When rmadmin/dfsadmin -refreshUserToGroupsMappings, it 
does not reload hadoop.user.group.static.mapping.overrides config.
                 Key: HDFS-9511
                 URL: https://issues.apache.org/jira/browse/HDFS-9511
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: security
    Affects Versions: 2.7.1
            Reporter: KWON BYUNGCHANG
            Priority: Minor


My environment does not allow add user/group.  I can't rely os user/group 
mechanism.
and I don’t want to show below log.

{code}
2015-11-26 13:21:48,486 WARN  security.UserGroupInformation 
(UserGroupInformation.java:getGroupNames(1521)) - No groups available for user 
hello
{code}

I append {{org.apache.hadoop.security.SimpleUserGroupsMapping}}.

It is very simple.  group of some user is user.  user and group are same.

if some users should be another group that is different with user name, use 
{{hadoop.user.group.static.mapping.overrides=user1=group;user2=group}}

problem is when {{hdfs dfsadmin -refreshUserToGroupsMappings}} ,  {{yarn 
rmadmin -refreshUserToGroupsMappings}}, it does not reload that config.

Thank you.




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