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https://issues.apache.org/jira/browse/HDFS-1300?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmytro Molkov updated HDFS-1300:
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Status: Patch Available (was: Open)
submitting for hudson
> Decommissioning nodes does not increase replication priority
> ------------------------------------------------------------
>
> Key: HDFS-1300
> URL: https://issues.apache.org/jira/browse/HDFS-1300
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 0.21.0, 0.20.2, 0.20.1, 0.20-append, 0.20.3, 0.22.0
> Reporter: Dmytro Molkov
> Assignee: Dmytro Molkov
> Fix For: 0.22.0
>
> Attachments: HDFS-1300.2.patch, HDFS-1300.3.patch, HDFS-1300.patch
>
>
> Currently when you decommission a node each block is only inserted into
> neededReplications if it is not there yet. This causes a problem of a block
> sitting in a low priority queue when all replicas sit on the nodes being
> decommissioned.
> The common usecase for decommissioning nodes for us is proactively exclude
> them before they went bad, so it would be great to get the blocks at risk
> onto the live datanodes as quickly as possible.
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