Hello, I have 2 namenodes in ha mode, running with 3 journal node, 3 zookeeper servers and 2 zkfc (one with each namenode)
If a server with the activated namenode and a zkfc get both down, the single instance of zkfc can't activate the standby namenode. So I end with a single namenode in standby mode. I can try to activate it with the following : hdfs haadmin -transitionToActive nn1 --forcemanual But it's recommended to disable the automatic failover to avoid split-brain. To do so, i stop all my namenode and set the dfs.ha.automatic-failover.enabled property to false. However, restarting the namenode doesn't change this configuration, i'm still getting the same warning while trying to activate the namenode. How can I change this configuration value ? Do I really need to have 3 namenode to avoid this situation (namenode manually activation), or can I achieve a full-auto conf with only 2 namenode ? Thanks for your help -- Quentin Ambard
