Re: hbase region server reboot steps
Yes, I've already stopped the balancer and manually moved the regions to other servers. Now I'm decommissioning the dfs data node on the server. After that I will reboot the server. 于 2014/4/9 22:28, Jean-Marc Spaggiari 写道: Hum. Disable load balancer, and move all the regions manually to other hosts using the shell? Then hard restart it? JM
Re: hbase region server reboot steps
Hi Rural, Decomission the node, stop the processes, and reboot. You can look at the scripts in bin/ to help you with that. Like bin/graceful_stop.sh. JM 2014-04-09 9:57 GMT-04:00 Rural Hunter ruralhun...@gmail.com: Hi, I have one region server which needs to be rebooted for server maintenance. The server hosts both the hadoop and hbase slave(hadoop2-hbase 0.96). What is the recommended steps to reboot it without impacting hbase service?
Re: hbase region server reboot steps
You can use bin/graceful_stop.sh to stop the region server process. # Move regions off a server then stop it. Optionally restart and reload. # Turn off the balancer before running this script. After that, you can stop hadoop (datanode, etc) On Wed, Apr 9, 2014 at 7:57 AM, Rural Hunter ruralhun...@gmail.com wrote: Hi, I have one region server which needs to be rebooted for server maintenance. The server hosts both the hadoop and hbase slave(hadoop2-hbase 0.96). What is the recommended steps to reboot it without impacting hbase service?
Re: hbase region server reboot steps
Thanks. What if I'm not able to login the region server(both ssh and local)? I have to reboot and check the server because of this serious problem. 于 2014/4/9 22:01, Ted Yu 写道: You can use bin/graceful_stop.sh to stop the region server process. # Move regions off a server then stop it. Optionally restart and reload. # Turn off the balancer before running this script. After that, you can stop hadoop (datanode, etc)
Re: hbase region server reboot steps
Actually I have to do a hard reboot. Let me provide more info about the problem: Except the ssh service(ssh error is: ssh_exchange_identification: Connection closed by remote host) and local login problem, other services are running fine on the server(including http/ftp/hbase/hadoop etc). 于 2014/4/9 22:14, Rural Hunter 写道: Thanks. What if I'm not able to login the region server(both ssh and local)? I have to reboot and check the server because of this serious problem. 于 2014/4/9 22:01, Ted Yu 写道: You can use bin/graceful_stop.sh to stop the region server process. # Move regions off a server then stop it. Optionally restart and reload. # Turn off the balancer before running this script. After that, you can stop hadoop (datanode, etc)
Re: hbase region server reboot steps
Hum. Disable load balancer, and move all the regions manually to other hosts using the shell? Then hard restart it? JM 2014-04-09 10:26 GMT-04:00 Rural Hunter ruralhun...@gmail.com: Actually I have to do a hard reboot. Let me provide more info about the problem: Except the ssh service(ssh error is: ssh_exchange_identification: Connection closed by remote host) and local login problem, other services are running fine on the server(including http/ftp/hbase/hadoop etc). 于 2014/4/9 22:14, Rural Hunter 写道: Thanks. What if I'm not able to login the region server(both ssh and local)? I have to reboot and check the server because of this serious problem. 于 2014/4/9 22:01, Ted Yu 写道: You can use bin/graceful_stop.sh to stop the region server process. # Move regions off a server then stop it. Optionally restart and reload. # Turn off the balancer before running this script. After that, you can stop hadoop (datanode, etc)
Re: hbase region server reboot steps
Rural: Take a look at: http://hbase.apache.org/book.html#decommission especially 15.3.1.1 On Wed, Apr 9, 2014 at 8:28 AM, Jean-Marc Spaggiari jean-m...@spaggiari.org wrote: Hum. Disable load balancer, and move all the regions manually to other hosts using the shell? Then hard restart it? JM 2014-04-09 10:26 GMT-04:00 Rural Hunter ruralhun...@gmail.com: Actually I have to do a hard reboot. Let me provide more info about the problem: Except the ssh service(ssh error is: ssh_exchange_identification: Connection closed by remote host) and local login problem, other services are running fine on the server(including http/ftp/hbase/hadoop etc). 于 2014/4/9 22:14, Rural Hunter 写道: Thanks. What if I'm not able to login the region server(both ssh and local)? I have to reboot and check the server because of this serious problem. 于 2014/4/9 22:01, Ted Yu 写道: You can use bin/graceful_stop.sh to stop the region server process. # Move regions off a server then stop it. Optionally restart and reload. # Turn off the balancer before running this script. After that, you can stop hadoop (datanode, etc)
