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https://issues.apache.org/jira/browse/HDFS-11175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15695296#comment-15695296
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Yuanbo Liu commented on HDFS-11175:
-----------------------------------

[~ajisakaa] Thanks for your comments.
I was following 2.7.2 docs to setup kms and found this issue.

> Document uppercase key names are not supported in TransparentEncryption.md
> --------------------------------------------------------------------------
>
>                 Key: HDFS-11175
>                 URL: https://issues.apache.org/jira/browse/HDFS-11175
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: documentation
>            Reporter: Yuanbo Liu
>            Assignee: Yiqun Lin
>            Priority: Minor
>              Labels: newbie
>             Fix For: 2.8.0, 3.0.0-alpha2
>
>         Attachments: HDFS-11175.001.patch
>
>
> After HADOOP-11311, key names has been restricted and uppercase key names are 
> not allowed. This section of {{TransparentEncryption.md}} should be modified.
> {quote}
> # As the normal user, create a new encryption key
> hadoop key create myKey
> # As the super user, create a new empty directory and make it an encryption 
> zone
> hadoop fs -mkdir /zone
> hdfs crypto -createZone -keyName myKey -path /zone
> # chown it to the normal user
> hadoop fs -chown myuser:myuser /zone
> # As the normal user, put a file in, read it out
> hadoop fs -put helloWorld /zone
> hadoop fs -cat /zone/helloWorld
> {quote}
> "myKey" is not allowed here.



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