From 725621d95a833f813e2164e32b33984e1c1ee29a Mon Sep 17 00:00:00 2001 From: Jing Zhao Date: Wed, 15 Apr 2015 13:10:38 -0700 Subject: [PATCH] HDFS-7934. Update RollingUpgrade rollback documentation: should use bootstrapstandby for standby NN. Contributed by J. Andreina. (cherry picked from commit b172d03595d1591e7f542791224607d8c5fce3e2) --- hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt | 3 +++ .../hadoop-hdfs/src/site/xdoc/HdfsRollingUpgrade.xml | 4 +++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt index 4fcfc061812..5c8b2d53cb7 100644 --- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt +++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt @@ -207,6 +207,9 @@ 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 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 a62198f17bd..8fd4f1cd3fa 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 @@

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 NN1 and NN2 are respectively in active and standby states. Below are the steps for rollback: