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https://issues.apache.org/jira/browse/HDFS-11378?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Manoj Govindassamy updated HDFS-11378:
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Attachment: HDFS-11378.01.patch
Attached v01 patch to address the following
* A new method {{takeNodeOutofService}} in AdminStatesBaseTest to take in a
list of DataNodeUUIDs for decommission/maintenance operations
* New test in {{TestDecommission}} to invoke takeNodeOutofService with multiple
DNs at the same time, verify the replication factor after decommission
* New test in {{TestMaintenanceState}} to invoke takeNodeOutofService with
multiple DNs at the same time, verify the replication factor before and after
maintenance operation
[~eddyxu], [~mingma], can you please take a look at the patch ? Thanks.
> Verify multiple DataNodes can be decommissioned/maintenance at the same time
> ----------------------------------------------------------------------------
>
> Key: HDFS-11378
> URL: https://issues.apache.org/jira/browse/HDFS-11378
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs
> Affects Versions: 3.0.0-alpha1
> Reporter: Manoj Govindassamy
> Assignee: Manoj Govindassamy
> Attachments: HDFS-11378.01.patch
>
>
> DecommissionManager is capable of transitioning multiple DataNodes to
> Decommission/Maintenance states. Current tests under TestDecommission and
> TestMaintenanceState only request for one DataNode for
> Decommission/Maintenance. Better if we can simulate real world cases whereby
> multiple DataNodes can be taken out of service and verify the resulting block
> replication factor for the files.
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