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https://issues.apache.org/jira/browse/HDFS-3744?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinay updated HDFS-3744:
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Attachment: HDFS-3744.patch
{quote}I think my preference here is to require the admin to keep the excluded
hosts files in sync across the machines (most deployments already have some way
of keeping config files in sync), and then just make dfsadmin iterate over all
configured NNs when the refreshNodes command is run.{quote}
Attaching a patch which this change. Please review.
> Decommissioned nodes are included in cluster after switch which is not
> expected
> -------------------------------------------------------------------------------
>
> Key: HDFS-3744
> URL: https://issues.apache.org/jira/browse/HDFS-3744
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: ha
> Affects Versions: 2.0.0-alpha, 2.0.1-alpha
> Reporter: Brahma Reddy Battula
> Attachments: HDFS-3744.patch
>
>
> 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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