[jira] [Created] (HADOOP-12947) Update documentation Hadoop Groups Mapping to add static group mapping, negative cache

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

Wei-Chiu Chuang created HADOOP-12947:
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             Summary: Update documentation Hadoop Groups Mapping to add static group mapping, negative cache
                 Key: HADOOP-12947
                 URL: https://issues.apache.org/jira/browse/HADOOP-12947
             Project: Hadoop Common
          Issue Type: Improvement
          Components: documentation, security
    Affects Versions: 2.7.2
            Reporter: Wei-Chiu Chuang
            Assignee: Wei-Chiu Chuang
            Priority: Minor


After _Hadoop Group Mapping_ was written, I subsequently found a number of other things that should be added/updated: 

# static group mapping, statically map users to group names (HADOOP-10142)
# negative cache, to avoid spamming NameNode with invalid user names (HADOOP-10755)
# update query pattern for LDAP groups mapping if posix semantics is supported. (HADOOP-9477)



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