Cluster-running upgrade is only supported after 2.4, that is, upgrade from 2.4 to 2.4+ is supported; upgrading from 2.2 to 2.4 is not supported;
Regards, *Stanley Shi,* On Fri, Jun 20, 2014 at 5:50 PM, Jason Meng <neu...@126.com> wrote: > Hi, > > I setup Hadoop 2.2 cluster with NameNode HA. How to upgrade it to 2.4? I > try to upgrade according to > http://hadoop.apache.org/docs/r2.4.0/hadoop-project-dist/hadoop-hdfs/HdfsRollingUpgrade.html, > but can't works. Is there a detailed step by step guide include when to > shutdown namenode or when to change env variable like HADOOP_HOME in which > step? There are two mode to upgrade, cluster running or cluster stopped. > Either one is ok. Thanks. > > Regards, > Jason > > >
