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From bo...@apache.org
Subject svn commit: r1345304 - /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-site/src/site/apt/ClusterSetup.apt.vm
Date Fri, 01 Jun 2012 18:18:16 GMT
Author: bobby
Date: Fri Jun  1 18:18:16 2012
New Revision: 1345304

URL: http://svn.apache.org/viewvc?rev=1345304&view=rev
Log:
HADOOP-8460. Document proper setting of HADOOP_PID_DIR and HADOOP_SECURE_DN_PID_DIR (bobby)

Modified:
    hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-site/src/site/apt/ClusterSetup.apt.vm

Modified: hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-site/src/site/apt/ClusterSetup.apt.vm
URL: http://svn.apache.org/viewvc/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-site/src/site/apt/ClusterSetup.apt.vm?rev=1345304&r1=1345303&r2=1345304&view=diff
==============================================================================
--- hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-site/src/site/apt/ClusterSetup.apt.vm
(original)
+++ hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-site/src/site/apt/ClusterSetup.apt.vm
Fri Jun  1 18:18:16 2012
@@ -85,6 +85,11 @@ Hadoop MapReduce Next Generation - Clust
     At the very least you should specify the <<<JAVA_HOME>>> so that it
is 
     correctly defined on each remote node.
 
+    In most cases you should also specify <<<HADOOP_PID_DIR>>> and 
+    <<<HADOOP_SECURE_DN_PID_DIR>>> to point to directories that can only
be
+    written to by the users that are going to run the hadoop daemons.  
+    Otherwise there is the potential for a symlink attack.
+
     Administrators can configure individual daemons using the configuration 
     options shown below in the table:
 



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