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https://issues.apache.org/jira/browse/HDFS-7659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14288491#comment-14288491
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Konstantin Shvachko commented on HDFS-7659:
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Agreed about Preconditions.
Why don't we just add the negative check to the condition: {{if(oldLength <
newLength) {}}
For the test an attempt to truncate to < 0 size could be added to
{{testTruncateFailure()}}.
I guess these type of conditions to be implemented in TestCLI for truncate
under HDFS-7058.
> We should check the new length of truncate can't be a negative value.
> ---------------------------------------------------------------------
>
> Key: HDFS-7659
> URL: https://issues.apache.org/jira/browse/HDFS-7659
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, namenode
> Reporter: Yi Liu
> Assignee: Yi Liu
> Fix For: 3.0.0
>
> Attachments: HDFS-7659.001.patch
>
>
> It's obvious that we should check the new length of truncate can't be a
> negative value.
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