The Ambari agents rely on a set of files that store the pid of the running process to figure out if the components (e.g. RegionServer) are up. While the actual path may vary due to specific deployments, you can look at /var/run/hbase to see if the PID in the file is matching the process id of the active region server.
Is it possible for you to shutdown the region servers manually and start them through Ambari? If that is not possible then I can dig-up the exact command, as used by Ambari, to start the region server. That will ensure that the Ambari agent can "see" the region servers. Can you provide more details on "other UI components show those servers as being up"? Thanks Sumit On 7/10/13 6:05 AM, "Brian Jeltema" <[email protected]> wrote: >I have a 6-node cluster that I deployed with Ambari. While trying to >resolve some code issues, I >manually stopped/restarted some HBase RegionServers. Now the 'Hosts' page >shows some >nodes with a yellow bullet and the popup says the RegionServer is down in >those nodes. However, >those servers are running and all of the other UI components show those >servers as being up. >I've restarted the server and all the agents, with no change. Any >suggestions as to cause/fix? > >TIA > >Brian
