You need to restart your NameNodes to get them to use the new QJM 5-host-set configs, and I think you can do that without downtime if you're already in HA mode by restarting one NN at a time.
To add new JNs first though, you will currently have to rsync their directory from a good JN to get them into the cluster (i.e. rsync the data from a good one before you start the new JNs). They will not auto-join otherwise. On Fri, Jul 12, 2013 at 12:57 PM, lei liu <liulei...@gmail.com> wrote: > I use QJM for HA in hadoop2.0, now there are three JournalNodes in HDFS > cluster, I want to add two new JournalNodes to HDFS cluster, how to do it? > Do I need to restart HDFS cluster? > > > Thanks, > > LiuLei -- Harsh J
