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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5379) Include FS delegation token ID in job conf
Date Thu, 01 Aug 2013 20:25:49 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13726830#comment-13726830
] 

Alejandro Abdelnur commented on MAPREDUCE-5379:
-----------------------------------------------

I've played around and got Daryn's patch to work. After running the patch by Andrew Wang (who
is doing HDFS-4680) he brought up a a concern with the client driven tracking approach, "a
client can set a rogue trackingId". But with the sequenceId approach what is in the HDFS audit
can fully trusted and tracked to a user.

One concern Daryn mentioned above with the sequenceId approach was, and also told me offline,
the MR client decoding the token identifier, this could break things when moving token encoding
from writable to protobuff.

To address this, instead of the MR client decoding the token identifier it would simply do
a hash of its byte[] representation without decoding it.

In addition, the MR client should have an option to switch ON/OFF(default) the DT hash generation/injection
in the jobconf.

                
> Include FS delegation token ID in job conf
> ------------------------------------------
>
>                 Key: MAPREDUCE-5379
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5379
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: job submission, security
>    Affects Versions: 2.1.0-beta
>            Reporter: Sandy Ryza
>            Assignee: Sandy Ryza
>         Attachments: MAPREDUCE-5379-1.patch, MAPREDUCE-5379-2.patch, MAPREDUCE-5379.patch
>
>
> Making a job's FS delegation token ID accessible will allow external services to associate
it with the file system operations it performs.

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