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https://issues.apache.org/jira/browse/HDFS-4259?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13509427#comment-13509427
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Aaron T. Myers commented on HDFS-4259:
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+1, the patch looks good to me. I agree that this is an improvement to the
error message that should hopefully decrease confusion when folks see it.
> Improve pipeline DN replacement failure message
> -----------------------------------------------
>
> Key: HDFS-4259
> URL: https://issues.apache.org/jira/browse/HDFS-4259
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs-client
> Affects Versions: 2.0.2-alpha
> Reporter: Harsh J
> Assignee: Harsh J
> Priority: Minor
> Attachments: HDFS-4259.patch
>
>
> The current message shown is something such as below:
> bq. Failed to add a datanode. User may turn off this feature by setting
> X.policy in configuration, where the current policy is Y. (Nodes:
> current=\[foo\], original=\[bar\])
> This reads off like failing is a feature (but the intention and the reason we
> hit this isn't indicated strongly), and can be bettered.
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