[HDFS-3744] Decommissioned nodes are included in cluster after switch which is not expected

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 2.0.0-alpha, 2.0.1-alpha, 2.1.0-beta, 3.0.0-alpha1
• Component/s: ha
• Assignee: Vinayakumar B
• Reporter: Brahma Reddy Battula
• Created: 31/Jul/12 05:36
• Updated: 12/May/16 18:16
• Resolved: 16/Jul/14 08:01

Description

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.

Issue Links

• is part of: HDFS-6507 Improve DFSAdmin to support HA cluster better