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https://issues.apache.org/jira/browse/HDFS-16423?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei-Chiu Chuang reopened HDFS-16423:
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Reopen to backport this to lower branches.
> balancer should not get blocks on stale storages
> ------------------------------------------------
>
> Key: HDFS-16423
> URL: https://issues.apache.org/jira/browse/HDFS-16423
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: balancer & mover
> Reporter: qinyuren
> Assignee: qinyuren
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0
>
> Attachments: image-2022-01-13-17-18-32-409.png
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> We have met a problems as described in HDFS-16420
> We found that balancer copied a block multi times without deleting the source
> block if this block was placed in a stale storage. And resulting a block with
> many copies, but these redundant copies are not deleted until the storage
> become not stale.
>
> !image-2022-01-13-17-18-32-409.png|width=657,height=275!
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