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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9405) Warmup NameNode EDEK caches in background thread
Date Mon, 21 Mar 2016 18:38:25 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9405?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15204847#comment-15204847
] 

Andrew Wang commented on HDFS-9405:
-----------------------------------

One teensy nit is that I think we could make initialDelay and retryInterval final, but that's
not a blocker. Will commit shortly, thanks Xiao!

> Warmup NameNode EDEK caches in background 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, HDFS-9405.07.patch, HDFS-9405.08.patch, HDFS-9405.09.patch,
HDFS-9405.10.patch, HDFS-9405.11.patch, HDFS-9405.12.patch, HDFS-9405.13.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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