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https://issues.apache.org/jira/browse/HDFS-9405?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15192175#comment-15192175
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Xiao Chen commented on HDFS-9405:
---------------------------------

Failed tests look unrelated. May I get another review? Thanks a lot.

> When starting a file, NameNode should generate EDEK in a separate thread
> ------------------------------------------------------------------------
>
>                 Key: HDFS-9405
>                 URL: https://issues.apache.org/jira/browse/HDFS-9405
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: encryption, namenode
>    Affects Versions: 2.7.1
>            Reporter: Zhe Zhang
>            Assignee: Xiao Chen
>         Attachments: HDFS-9405.01.patch, HDFS-9405.02.patch, 
> HDFS-9405.03.patch, HDFS-9405.04.patch, HDFS-9405.05.patch, HDFS-9405.06.patch
>
>
> {{generateEncryptedDataEncryptionKey}} involves a non-trivial I/O operation 
> to the key provider, which could be slow or cause timeout. It should be done 
> as a separate thread so as to return a proper error message to the RPC caller.



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