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From t...@apache.org
Subject svn commit: r1433624 - in /hadoop/common/trunk/hadoop-common-project/hadoop-common: CHANGES.txt src/main/resources/core-default.xml
Date Tue, 15 Jan 2013 20:43:32 GMT
Author: todd
Date: Tue Jan 15 20:43:32 2013
New Revision: 1433624

URL: http://svn.apache.org/viewvc?rev=1433624&view=rev
Log:
HADOOP-8712. Change default hadoop.security.group.mapping to JniBasedUnixGroupsNetgroupMappingWithFallback.
Contributed by Robert Parker.

Modified:
    hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
    hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/resources/core-default.xml

Modified: hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
URL: http://svn.apache.org/viewvc/hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt?rev=1433624&r1=1433623&r2=1433624&view=diff
==============================================================================
--- hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt (original)
+++ hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt Tue Jan 15 20:43:32
2013
@@ -436,6 +436,9 @@ Release 2.0.3-alpha - Unreleased 
     HADOOP-9192. Move token related request/response messages to common.
     (suresh)
 
+    HADOOP-8712. Change default hadoop.security.group.mapping to
+    JniBasedUnixGroupsNetgroupMappingWithFallback (Robert Parker via todd)
+
   OPTIMIZATIONS
 
     HADOOP-8866. SampleQuantiles#query is O(N^2) instead of O(N). (Andrew Wang

Modified: hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/resources/core-default.xml
URL: http://svn.apache.org/viewvc/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/resources/core-default.xml?rev=1433624&r1=1433623&r2=1433624&view=diff
==============================================================================
--- hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/resources/core-default.xml
(original)
+++ hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/resources/core-default.xml
Tue Jan 15 20:43:32 2013
@@ -80,9 +80,17 @@
 
 <property>
   <name>hadoop.security.group.mapping</name>
-  <value>org.apache.hadoop.security.ShellBasedUnixGroupsMapping</value>
+  <value>org.apache.hadoop.security.JniBasedUnixGroupsMappingWithFallback</value>
   <description>
-    Class for user to group mapping (get groups for a given user) for ACL
+    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. If JNI is 
+    available the implementation will use the API within hadoop to resolve a 
+    list of groups for a user. If JNI is not available then the shell 
+    implementation, ShellBasedUnixGroupsMapping, is used.  This implementation 
+    shells out to the Linux/Unix environment with the 
+    <code>bash -c groups</code> command to resolve a list of groups for a user.
   </description>
 </property>
 



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