[jira] [Created] (HADOOP-8636) Decommissioned nodes are included in cluster after switch which is not expected

["Brahma Reddy Battula (JIRA)" <ji...@apache.org>]

Brahma Reddy Battula created HADOOP-8636:
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             Summary: Decommissioned nodes are included in cluster after switch which is not expected
                 Key: HADOOP-8636
                 URL: https://issues.apache.org/jira/browse/HADOOP-8636
             Project: Hadoop Common
          Issue Type: Bug
          Components: ha
    Affects Versions: 2.0.0-alpha, 2.1.0-alpha, 2.0.1-alpha
            Reporter: Brahma Reddy Battula


Scenario:
=========

Start ANN and SNN with three DN's

Exclude DN1 from cluster by using decommission feature 

(./hdfs dfsadmin -fs hdfs://ANNIP:8020 -refreshNodes)

After decommission successful,do switch such that SNN will become Active.

Here exclude node(DN1) is included in cluster.Able to write files to excluded node since it's not excluded.

Checked SNN(Which Active before switch) UI decommissioned=1 and ANN UI 
decommissioned=0

One more Observation:
====================

All dfsadmin commands will create proxy only on nn1 irrespective of Active or standby.I think this also we need to re-look once..


I am not getting , why we are not given HA for dfsadmin commands..?

Please correct me,,If I am wrong.

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