It looks like the behavior is the same with 0.18.2 and 0.19.0. Even though I removed the decommissioned node from the exclude file and run the refreshNode command, the decommissioned node still show up as a dead node. What I did noticed is that if I leave the decommissioned node in the exclude and restart HDFS, the node will show up as a dead node after restart. But then if I remove it from the exclude file and run the refreshNode command, it will disappear from the status page (dfshealth.jsp).
So it looks like I will have to stop and start the entire cluster in order to get what I want. Bill On Thu, Jan 29, 2009 at 5:40 PM, Bill Au <bill.w...@gmail.com> wrote: > Not sure why but this does not work for me. I am running 0.18.2. I ran > hadoop dfsadmin -refreshNodes after removing the decommissioned node from > the exclude file. It still shows up as a dead node. I also removed it from > the slaves file and ran the refresh nodes command again. It still shows up > as a dead node after that. > > I am going to upgrade to 0.19.0 to see if it makes any difference. > > Bill > > > On Tue, Jan 27, 2009 at 7:01 PM, paul <paulg...@gmail.com> wrote: > >> Once the nodes are listed as dead, if you still have the host names in >> your >> conf/exclude file, remove the entries and then run hadoop dfsadmin >> -refreshNodes. >> >> >> This works for us on our cluster. >> >> >> >> -paul >> >> >> On Tue, Jan 27, 2009 at 5:08 PM, Bill Au <bill.w...@gmail.com> wrote: >> >> > 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 >> > >> > >
