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Date: Wed, 11 Jan 2017 11:12:58 +0000 (UTC)
From: "Yiqun Lin (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Message-ID: <JIRA.13033348.1484047891000.708033.1484133178425@Atlassian.JIRA>
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Subject: [jira] [Updated] (HADOOP-13965) Groups should be consistent in
 using default group mapping class
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archived-at: Wed, 11 Jan 2017 11:13:01 -0000


     [ https://issues.apache.org/jira/browse/HADOOP-13965?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yiqun Lin updated HADOOP-13965:
-------------------------------
    Description: 
{code:title=Groups.java}
      public Groups(Configuration conf, final Timer timer) {
       impl = 
      ReflectionUtils.newInstance(
          conf.getClass(CommonConfigurationKeys.HADOOP_SECURITY_GROUP_MAPPING, 
                        ShellBasedUnixGroupsMapping.class, 
                        GroupMappingServiceProvider.class), 
          conf);
      ...
}
{code}
The default value of setting {{hadoop.security.group.mapping}} is different in code and config file. In file {{core-default.xml}}, it uses the class {{JniBasedUnixGroupsMappingWithFallback}} and this should be the true value.
{code}
<property>
  <name>hadoop.security.group.mapping</name>
  <value>org.apache.hadoop.security.JniBasedUnixGroupsMappingWithFallback</value>
  <description>
    Class for user to group mapping (get groups for a given user) for ACL.
    The default implementation,
    org.apache.hadoop.security.JniBasedUnixGroupsMappingWithFallback,
    will determine if the Java Native Interface (JNI) is available.....
  </description>
</property>
{code}

  was:
{code:title=Groups.java}
      public Groups(Configuration conf, final Timer timer) {
       impl = 
      ReflectionUtils.newInstance(
          conf.getClass(CommonConfigurationKeys.HADOOP_SECURITY_GROUP_MAPPING, 
                        ShellBasedUnixGroupsMapping.class, 
                        GroupMappingServiceProvider.class), 
          conf);
      ...
}
{code}
The default value of setting {{hadoop.security.group.mapping}} is different in code and config file. In file {{core-default.xml}}, it uses the class {{JniBasedUnixGroupsMappingWithFallback}} and this should be the true value.


> Groups should be consistent in using default group mapping class
> ----------------------------------------------------------------
>
>                 Key: HADOOP-13965
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13965
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 3.0.0-alpha2
>            Reporter: Yiqun Lin
>            Assignee: Yiqun Lin
>            Priority: Minor
>         Attachments: HADOOP-13965.001.patch
>
>
> {code:title=Groups.java}
>       public Groups(Configuration conf, final Timer timer) {
>        impl = 
>       ReflectionUtils.newInstance(
>           conf.getClass(CommonConfigurationKeys.HADOOP_SECURITY_GROUP_MAPPING, 
>                         ShellBasedUnixGroupsMapping.class, 
>                         GroupMappingServiceProvider.class), 
>           conf);
>       ...
> }
> {code}
> The default value of setting {{hadoop.security.group.mapping}} is different in code and config file. In file {{core-default.xml}}, it uses the class {{JniBasedUnixGroupsMappingWithFallback}} and this should be the true value.
> {code}
> <property>
>   <name>hadoop.security.group.mapping</name>
>   <value>org.apache.hadoop.security.JniBasedUnixGroupsMappingWithFallback</value>
>   <description>
>     Class for user to group mapping (get groups for a given user) for ACL.
>     The default implementation,
>     org.apache.hadoop.security.JniBasedUnixGroupsMappingWithFallback,
>     will determine if the Java Native Interface (JNI) is available.....
>   </description>
> </property>
> {code}



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