I was able to decommission a datanode successfully without having to stop my cluster. But I noticed that after a node has been decommissioned, it shows up as a dead node in the web base interface to the namenode (ie dfshealth.jsp). My cluster is relatively small and losing a datanode will have performance impact. So I have a need to monitor the health of my cluster and take steps to revive any dead datanode in a timely fashion. So is there any way to altogether "get rid of" any decommissioned datanode from the web interace of the namenode? Or is there a better way to monitor the health of the cluster?
Bill
