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https://issues.apache.org/jira/browse/HDFS-7843?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz Wo Nicholas Sze updated HDFS-7843:
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Component/s: (was: datanode)
Fix Version/s: (was: 2.7.0)
> A truncated file is corrupted after rollback from a rolling upgrade
> -------------------------------------------------------------------
>
> Key: HDFS-7843
> URL: https://issues.apache.org/jira/browse/HDFS-7843
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Reporter: Tsz Wo Nicholas Sze
> Assignee: Tsz Wo Nicholas Sze
> Priority: Blocker
> Attachments: h7843_20150226.patch
>
>
> Here is a rolling upgrade truncate test from [~brandonli]. The basic test
> step is: (3 nodes cluster with HA)
> 1. upload a file to hdfs
> 2. start rollingupgrade. finish rollingupgrade for namenode and one datanode.
> 3. truncate the file in hdfs to 1byte
> 4. do rollback
> 5. download file from hdfs, check file size to be original size
> I see the file size in hdfs is correct but can't read it because the block is
> corrupted.
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