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https://issues.apache.org/jira/browse/HDFS-1831?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13020178#comment-13020178
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Suresh Srinivas commented on HDFS-1831:
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> We should also validate the flag in NameNode.
I had to remove it to fix TestLeaseAppend2 failure.

TestLeaseAppend2 fails if the validation rejects the create request before 
going all the way to the end of FSNamesystem#startFileInternal(), through lease 
recovery code. This is a strange piece of code that we should address at some 
point.

> HDFS equivalent of HADOOP-7223 changes to handle FileContext createFlag 
> combinations
> ------------------------------------------------------------------------------------
>
>                 Key: HDFS-1831
>                 URL: https://issues.apache.org/jira/browse/HDFS-1831
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>    Affects Versions: 0.22.0, 0.23.0
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>             Fix For: 0.23.0
>
>         Attachments: HDFS-1831.1.patch, HDFS-1831.4.patch, HDFS-1831.patch
>
>
> During file creation with FileContext, the expected behavior is not clearly 
> defined for combination of createFlag EnumSet. This is HDFS equivalent of 
> HADOOP-7223

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