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https://issues.apache.org/jira/browse/HADOOP-4292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12637284#action_12637284
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Doug Cutting commented on HADOOP-4292:
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> Even only the CRC file is truncated, fail in append could result in
> data-checksum inconsistency. How could we fix this?
With ChecksumFileSystem, lots of failures can result in data-checksum
inconsistency. I don't think this makes the situation particularly worse.
Perhaps we could change the checksum file's format so that it includes a
trailing element that includes the file's length or somesuch, to avoid such
false-positives.
> There will be a lot of changes [ ... ]
More than the addition of a single method to FileSystem.java?
> 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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