HADOOP-12568. Update core-default.xml to describe posixGroups support. 
Contributed by Wei-Chiu Chuang.

(cherry picked from commit 4a3b8f1ed20aaa6c9503a2888339a0ec8a6fefc1)


Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/faf87ddf
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/faf87ddf
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/faf87ddf

Branch: refs/heads/branch-2.7
Commit: faf87ddf78e326300d2683fd1748915bae44bf88
Parents: 3630c07
Author: Akira Ajisaka <aajis...@apache.org>
Authored: Wed Nov 18 17:23:00 2015 +0900
Committer: Konstantin V Shvachko <s...@apache.org>
Committed: Wed Feb 14 14:02:59 2018 -0800

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 hadoop-common-project/hadoop-common/CHANGES.txt             | 3 +++
 .../hadoop-common/src/main/resources/core-default.xml       | 9 ++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)
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http://git-wip-us.apache.org/repos/asf/hadoop/blob/faf87ddf/hadoop-common-project/hadoop-common/CHANGES.txt
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diff --git a/hadoop-common-project/hadoop-common/CHANGES.txt 
b/hadoop-common-project/hadoop-common/CHANGES.txt
index 6e6e248..b85b6a5 100644
--- a/hadoop-common-project/hadoop-common/CHANGES.txt
+++ b/hadoop-common-project/hadoop-common/CHANGES.txt
@@ -21,6 +21,9 @@ Release 2.7.6 - UNRELEASED
     HADOOP-9477. Add posixGroups support for LDAP groups mapping service.
     (Dapeng Sun via Yongjun Zhang)
 
+    HADOOP-12568. Update core-default.xml to describe posixGroups support.
+    (Wei-Chiu Chuang via aajisaka)
+
   OPTIMIZATIONS
 
   BUG FIXES

http://git-wip-us.apache.org/repos/asf/hadoop/blob/faf87ddf/hadoop-common-project/hadoop-common/src/main/resources/core-default.xml
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diff --git 
a/hadoop-common-project/hadoop-common/src/main/resources/core-default.xml 
b/hadoop-common-project/hadoop-common/src/main/resources/core-default.xml
index cd81325..4e7675d 100644
--- a/hadoop-common-project/hadoop-common/src/main/resources/core-default.xml
+++ b/hadoop-common-project/hadoop-common/src/main/resources/core-default.xml
@@ -320,6 +320,11 @@ for ldap providers in the same way as above does.
     an LDAP server with a non-AD schema, this should be replaced with
     (&amp;(objectClass=inetOrgPerson)(uid={0}). {0} is a special string used to
     denote where the username fits into the filter.
+
+    If the LDAP server supports posixGroups, Hadoop can enable the feature by
+    setting the value of this property to "posixAccount" and the value of
+    the hadoop.security.group.mapping.ldap.search.filter.group property to
+    "posixGroup".
   </description>
 </property>
 
@@ -329,7 +334,9 @@ for ldap providers in the same way as above does.
   <description>
     An additional filter to use when searching for LDAP groups. This should be
     changed when resolving groups against a non-Active Directory installation.
-    posixGroups are currently not a supported group class.
+
+    See the description of 
hadoop.security.group.mapping.ldap.search.filter.user
+    to enable posixGroups support.
   </description>
 </property>
 


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