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https://issues.apache.org/jira/browse/HADOOP-12793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15176677#comment-15176677
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Masatake Iwasaki commented on HADOOP-12793:
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SSL is enable by setting `hadoop.security.group.mapping.ldap` to `true`.
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The configuration key should be {{hadoop.security.group.mapping.ldap.ssl}}?
> Write a new group mapping service guide
> ---------------------------------------
>
> Key: HADOOP-12793
> URL: https://issues.apache.org/jira/browse/HADOOP-12793
> Project: Hadoop Common
> Issue Type: Improvement
> Components: documentation
> Affects Versions: 2.7.2
> Reporter: Wei-Chiu Chuang
> Assignee: Wei-Chiu Chuang
> Labels: ldap, supportability
> Attachments: HADOOP-12791.001.patch, HADOOP-12793.002.patch,
> HADOOP-12793.003.patch, HADOOP-12793.004.patch, HADOOP-12793.005.patch
>
>
> LdapGroupsMapping has lots of configurable properties and is thus fairly
> complex in nature. _HDFS Permissions Guide_ has a minimal introduction to
> LdapGroupsMapping, with reference to "More information on configuring the
> group mapping service is available in the Javadocs."
> However, its Javadoc provides no information about how to configure it.
> Core-default.xml has descriptions for each property, but still lacks a
> comprehensive tutorial. Without a tutorial/guide, these configurable
> properties would be buried under the sea of properties.
> Both Cloudera and HortonWorks has some information regarding LDAP group
> mapping:
> http://www.cloudera.com/documentation/enterprise/latest/topics/cm_sg_ldap_grp_mappings.html
> http://hortonworks.com/blog/hadoop-groupmapping-ldap-integration/
> But neither cover all configurable features, such as using SSL with LDAP, and
> POSIX group semantics.
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