HADOOP-14948. Document missing config key hadoop.treat.subject.external. 
Contributed by Ajay Kumar.


Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/e906108f
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/e906108f
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/e906108f

Branch: refs/heads/YARN-1011
Commit: e906108fc98a011630d12a43e557b81d7ef7ea5d
Parents: 8a61525
Author: Wei-Chiu Chuang <weic...@apache.org>
Authored: Mon Oct 16 16:42:59 2017 -0700
Committer: Wei-Chiu Chuang <weic...@apache.org>
Committed: Mon Oct 16 16:42:59 2017 -0700

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 .../hadoop-common/src/main/resources/core-default.xml  | 13 +++++++++++++
 1 file changed, 13 insertions(+)
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http://git-wip-us.apache.org/repos/asf/hadoop/blob/e906108f/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 e7ea10f..bde7a85 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
@@ -2763,4 +2763,17 @@
         the ZK CLI).
     </description>
   </property>
+  <property>
+    <name>hadoop.treat.subject.external</name>
+    <value>false</value>
+    <description>
+      When creating UGI with UserGroupInformation(Subject), treat the passed
+      subject external if set to true, and assume the owner of the subject
+      should do the credential renewal.
+
+      When true this property will introduce an incompatible change which
+      may require changes in client code. For more details, see the jiras:
+      HADOOP-13805,HADOOP-13558.
+    </description>
+  </property>
 </configuration>


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