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https://issues.apache.org/jira/browse/HDFS-2246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13145733#comment-13145733
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Tsz Wo (Nicholas), SZE commented on HDFS-2246:
----------------------------------------------
Comments on the client side:
- In BlockReaderLocal,
-* In getBlockPathInfo(..), use the local variable proxy in the following.
Otherwise, there is a race condition that datanodeProxy could be null.
{code}
pathinfo = datanodeProxy.getBlockLocalPathInfo(blk);
{code}
-* rename datanodeProxy to localhostProxy
-* replace the DatanodeInfo parameter newBlockReader with a port and use
localhost:port to create proxy.
-* when should the proxy be stopped?
-* Why recordAllowedUser but not read the user from conf?
> Shortcut a local client reads to a Datanodes files directly
> -----------------------------------------------------------
>
> Key: HDFS-2246
> URL: https://issues.apache.org/jira/browse/HDFS-2246
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Sanjay Radia
> Attachments: 0001-HDFS-347.-Local-reads.patch,
> HDFS-2246-branch-0.20-security-205.patch,
> HDFS-2246-branch-0.20-security-205.patch,
> HDFS-2246-branch-0.20-security.patch, HDFS-2246.20s.1.patch,
> HDFS-2246.20s.2.txt, HDFS-2246.20s.3.txt, HDFS-2246.20s.4.txt,
> HDFS-2246.20s.patch, localReadShortcut20-security.2patch
>
>
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