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https://issues.apache.org/jira/browse/HDFS-2246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13109203#comment-13109203
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Todd Lipcon commented on HDFS-2246:
-----------------------------------
ah, that makes some sense. Each proxy has a different token so they're cached
separately at the IPC layer. We can call RPC.stopProxy but then we might run
into HADOOP-7317.
Would it be possible to use kerberos-authenticated RPC to the DN, and then pass
the block token as a parameter to the method like was done in one of the
earlier revs of the patch? It's a little "unorthodox" but gets around the
connection caching issue. Passing the block token means we can still check
block access based on HDFS permissions, and run as separate principals.
> 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-2246.20s.1.patch,
> HDFS-2246.20s.2.txt, HDFS-2246.20s.3.txt, HDFS-2246.20s.patch,
> localReadShortcut20-security.2patch
>
>
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