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https://issues.apache.org/jira/browse/HDFS-7411?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Wang updated HDFS-7411:
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Attachment: hdfs-7411.003.patch
I spent some more time and did a much bigger rework of DecommissionManager. The
more I got into it, the more I found, so this is essentially a rewrite.
The highlights:
* Moved almost all the decom logic into DecomManager, significant reworks,
including the above
* Introduced the idea of an "insufficiently replicated" block. A block can be
under-replicated but not block decommissioning.
* Monitor scans now iterate for a number of blocks, rather than a number of
nodes. This should be much smoother. The configuration becomes a little
unfortunate, but this scheme preserves backwards compatibility.
* Switched a few things to SLF4J
* Added lots of comments
* Cleaned up decom tests a good bit
* Fixed a bug in ChunkedArrayList, since its size does not respect
iterator.remove()
> Refactor decommissioning logic into DecommissionManager
> -------------------------------------------------------
>
> Key: HDFS-7411
> URL: https://issues.apache.org/jira/browse/HDFS-7411
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 2.5.1
> Reporter: Andrew Wang
> Assignee: Andrew Wang
> Attachments: hdfs-7411.001.patch, hdfs-7411.002.patch,
> hdfs-7411.003.patch
>
>
> Would be nice to split out decommission logic from DatanodeManager to
> DecommissionManager.
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