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https://issues.apache.org/jira/browse/HADOOP-4292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12637234#action_12637234
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Doug Cutting commented on HADOOP-4292:
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As Raghu points out and you acknowledged on the list, only the CRC file needs
to be truncated.
An alternative would be to re-write the entire CRC file when truncate is not
possible.
Should we add truncate() to FileSystem.java instead of to a new interface?
Why does the truncate method return an FSDataOutputStream? Perhaps it could
return a boolean, indicating whether it was successful. Then the default
implementation could simply return false. Or it could return void and the
default would throw UnsupportedOperationException.
> append() does not work for LocalFileSystem
> ------------------------------------------
>
> Key: HADOOP-4292
> URL: https://issues.apache.org/jira/browse/HADOOP-4292
> Project: Hadoop Core
> Issue Type: Bug
> Components: fs
> Affects Versions: 0.18.0, 0.19.0
> Reporter: Raghu Angadi
> Assignee: Hairong Kuang
> Priority: Blocker
> Fix For: 0.18.2, 0.19.0
>
>
> append is supported by LocalFileSystem but it does not update crc when a file
> is appended.
> When you enable checksum verification {{TestLocalFileSystem.testAppend}}
> fails. Since HADOOP-4277 is a blocker for 0.17 I am planning to disable this
> test in HADOOP-4277.
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