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https://issues.apache.org/jira/browse/HDFS-1725?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ivan Kelly updated HDFS-1725:
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Attachment: HDFS-1725.diff
I've removed everything that was related to ensuring that image and edits
directories are set from the start. In all it doesn't do very much now, just
pushes the FSImage() code around a bit and removes FSImage(URI).
I initially created this JIRA because it was possible to change the directories
underneath FSImage without going through FSImage. This made it hard to make
assumptions about the state of FSImage. This patch in its current form does not
fix that, so I wouldn't recommend it for submission.
> Cleanup FSImage construction
> ----------------------------
>
> Key: HDFS-1725
> URL: https://issues.apache.org/jira/browse/HDFS-1725
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Ivan Kelly
> Assignee: Ivan Kelly
> Fix For: 0.23.0
>
> Attachments: HDFS-1725.diff, HDFS-1725.diff, HDFS-1725.diff,
> HDFS-1725.diff, HDFS-1725.diff, HDFS-1725.diff
>
>
> FSImage construction is messy. Sometimes the storagedirectories in use are
> set straight away, sometimes they are not. This makes it hard for anything
> under FSImage (i.e. FSEditLog) to make assumptions about what it can use.
> Therefore, this patch makes FSImage set the storage directories in use during
> construction, and never allows them to change. If you want to change
> storagedirectories you create a new image.
> Also, all the construction code should be the same with the only difference
> being the parameters passed. When not passed, these should get sensible
> defaults.
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