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https://issues.apache.org/jira/browse/HADOOP-3310?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz Wo (Nicholas), SZE updated HADOOP-3310:
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Attachment: 3310_20080516b.patch
3310_20080516b.patch: my latest codes
*Question*: When updating a block (i.e. updating generation stamp and block
length), what happens if a reader tries to read the block? I guess the reader
should get an exception. However, how to tells whether a block is being
updated?
> Lease recovery for append
> -------------------------
>
> Key: HADOOP-3310
> URL: https://issues.apache.org/jira/browse/HADOOP-3310
> Project: Hadoop Core
> Issue Type: New Feature
> Components: dfs
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Attachments: 3310_20080514.patch, 3310_20080516b.patch
>
>
> In order to support file append, a GenerationStamp is associated with each
> block. Lease recovery will be performed when there is a possibility that the
> replicas of a block in a lease may have different GenerationStamp values.
> For more details, see the documentation in HADOOP-1700.
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