Repository: hadoop Updated Branches: refs/heads/branch-2.7 9e11ae684 -> e1ce0700e
HDFS-7934. Update RollingUpgrade rollback documentation: should use bootstrapstandby for standby NN. Contributed by J. Andreina. (cherry picked from commit b172d03595d1591e7f542791224607d8c5fce3e2) (cherry picked from commit 725621d95a833f813e2164e32b33984e1c1ee29a) Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/e1ce0700 Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/e1ce0700 Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/e1ce0700 Branch: refs/heads/branch-2.7 Commit: e1ce0700eb2c5bf2b765e6a93df8146207a6fa9e Parents: 9e11ae6 Author: Jing Zhao <ji...@apache.org> Authored: Wed Apr 15 13:10:38 2015 -0700 Committer: Jing Zhao <ji...@apache.org> Committed: Wed Apr 15 13:11:45 2015 -0700 ---------------------------------------------------------------------- hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt | 3 +++ .../hadoop-hdfs/src/site/xdoc/HdfsRollingUpgrade.xml | 4 +++- 2 files changed, 6 insertions(+), 1 deletion(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/hadoop/blob/e1ce0700/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 fda744b..242a2c8 100644 --- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt +++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt @@ -23,6 +23,9 @@ Release 2.7.1 - UNRELEASED HDFS-8151. Always use snapshot path as source when invalid snapshot names are used for diff based distcp. (jing9) + HDFS-7934. Update RollingUpgrade rollback documentation: should use + bootstrapstandby for standby NN. (J. Andreina via jing9) + Release 2.7.0 - UNRELEASED INCOMPATIBLE CHANGES http://git-wip-us.apache.org/repos/asf/hadoop/blob/e1ce0700/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 a62198f..8fd4f1c 100644 --- a/hadoop-hdfs-project/hadoop-hdfs/src/site/xdoc/HdfsRollingUpgrade.xml +++ b/hadoop-hdfs-project/hadoop-hdfs/src/site/xdoc/HdfsRollingUpgrade.xml @@ -263,14 +263,16 @@ <p> Rollback from a newer release to the pre-upgrade release is always supported. However, it cannot be done in a rolling fashion. It requires cluster downtime. + Suppose <em>NN1</em> and <em>NN2</em> are respectively in active and standby states. Below are the steps for rollback: </p> <ul> <li>Rollback HDFS<ol> <li>Shutdown all <em>NNs</em> and <em>DNs</em>.</li> <li>Restore the pre-upgrade release in all machines.</li> - <li>Start <em>NNs</em> with the + <li>Start <em>NN1</em> as Active with the "<a href="#namenode_-rollingUpgrade"><code>-rollingUpgrade rollback</code></a>" option.</li> + <li>Run `-bootstrapStandby' on NN2 and start it normally as standby.</li> <li>Start <em>DNs</em> with the "<code>-rollback</code>" option.</li> </ol></li> </ul>
