New Contributor
Posts: 10
Registered: ‎06-10-2017

Decommission status showing 0 instead of 1

[ Edited ]



I have installed apache hadoop in vmware and added one datanode.

After that i have decomission one datanode and showing decomission status as decomissioned. when i use hadoop dfsadmin -report command and dead node is one.





student@master:~/Installations/hadoop-1.2.1/conf$ hadoop dfsadmin -report
Configured Capacity: 24173277184 (22.51 GB)
Present Capacity: 15508320256 (14.44 GB)
DFS Remaining: 14705336320 (13.7 GB)
DFS Used: 802983936 (765.79 MB)
DFS Used%: 5.18%
Under replicated blocks: 14
Blocks with corrupt replicas: 0
Missing blocks: 0

Datanodes available: 1 (2 total, 1 dead)

Decommission Status : Normal
Configured Capacity: 24173277184 (22.51 GB)
DFS Used: 802983936 (765.79 MB)
Non DFS Used: 8664956928 (8.07 GB)
DFS Remaining: 14705336320(13.7 GB)
DFS Used%: 3.32%
DFS Remaining%: 60.83%
Last contact: Thu Jun 29 23:06:34 IST 2017

Decommission Status : Decommissioned
Configured Capacity: 0 (0 KB)
DFS Used: 0 (0 KB)
Non DFS Used: 0 (0 KB)
DFS Remaining: 0(0 KB)
DFS Used%: 100%
DFS Remaining%: 0%
Last contact: Thu Jan 01 05:30:00 IST 1970



When i check the status from webserver i.e http://master:50070 it's showing decommission status as zero value instead of 1. I am expecting that decommission value shoud be 1 instead of zero. 


Why value showing as 0 instead of 1? 


Posts: 410
Registered: ‎05-16-2016

Re: Decommission status showing 0 instead of 1

[ Edited ]

Do you have two datanodes intially and you decided to decommision one datanode . 

correct me if am wrong about my understanding  . 


I believ you are referring to  decommisioning nodes in Web Ui - which is zero 

because it states that there is  currently zero nodes getting decommisioned . hence it is zero 

if you see the dead node - u will see one because u did one already as per your statement . 


if you see conflicts then i would suggest you to perform a restart on the namenode if that is something you would consider .