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From vinayakum...@apache.org
Subject hadoop git commit: HDFS.7849. Update documentation for enabling a new feature in rolling upgrade ( Contributed by J.Andreina )
Date Thu, 19 Mar 2015 13:36:14 GMT
Repository: hadoop
Updated Branches:
  refs/heads/trunk e79be0ee1 -> 5be5129d9


HDFS.7849. Update documentation for enabling a new feature in rolling upgrade ( Contributed
by J.Andreina )


Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/5be5129d
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/5be5129d
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/5be5129d

Branch: refs/heads/trunk
Commit: 5be5129d93481e9caae6a05b2361c463211a6d55
Parents: e79be0e
Author: Vinayakumar B <vinayakumarb@apache.org>
Authored: Thu Mar 19 19:05:42 2015 +0530
Committer: Vinayakumar B <vinayakumarb@apache.org>
Committed: Thu Mar 19 19:05:42 2015 +0530

----------------------------------------------------------------------
 hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt                 | 3 +++
 .../hadoop-hdfs/src/site/xdoc/HdfsRollingUpgrade.xml        | 9 +++++++++
 2 files changed, 12 insertions(+)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/hadoop/blob/5be5129d/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
index d9e8b9e..ac58c39 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
@@ -764,6 +764,9 @@ Release 2.7.0 - UNRELEASED
 
     HDFS-7054. Make DFSOutputStream tracing more fine-grained (cmccabe)
 
+    HDFS.7849. Update documentation for enabling a new feature in rolling
+    upgrade ( J.Andreina via vinayakumarb )
+
   OPTIMIZATIONS
 
     HDFS-7454. Reduce memory footprint for AclEntries in NameNode.

http://git-wip-us.apache.org/repos/asf/hadoop/blob/5be5129d/hadoop-hdfs-project/hadoop-hdfs/src/site/xdoc/HdfsRollingUpgrade.xml
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/site/xdoc/HdfsRollingUpgrade.xml b/hadoop-hdfs-project/hadoop-hdfs/src/site/xdoc/HdfsRollingUpgrade.xml
index 28649a8..2ad28e1 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/site/xdoc/HdfsRollingUpgrade.xml
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/site/xdoc/HdfsRollingUpgrade.xml
@@ -48,6 +48,15 @@
     In order to upgrade a HDFS cluster without downtime, the cluster must be setup with HA.
   </p>
   <p>
+    If there is any new feature which is enabled in new software release, may not work with
old software release after upgrade.
+    In such cases upgrade should be done by following steps.
+  </p>
+  <ol>
+    <li>Disable new feature.</li>
+    <li>Upgrade the cluster.</li>
+    <li>Enable the new feature.</li>
+  </ol>
+  <p>
     Note that rolling upgrade is supported only from Hadoop-2.4.0 onwards.
   </p>
   <subsection name="Upgrade without Downtime" id="UpgradeWithoutDowntime">


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