hadoop-yarn-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Marcelo Vanzin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-941) RM Should have a way to update the tokens it has for a running application
Date Fri, 20 Jun 2014 20:38:26 GMT

    [ https://issues.apache.org/jira/browse/YARN-941?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14039318#comment-14039318
] 

Marcelo Vanzin commented on YARN-941:
-------------------------------------

[~jianhe], just to give a little more context about my question: what I was really thinking
is that, if there were a method for securely exchanging tokens, there would be no need for
token renewal, since there wouldn't be an avenue of attack based on sniffing tokens off the
network traffic. (Unless, at that point, you're worried about an attacker guessing the token
and you want to pre-emptively get a new one from time to time, but that sounds like an unlikely
attack - unless the token generator itself is weak.)

> RM Should have a way to update the tokens it has for a running application
> --------------------------------------------------------------------------
>
>                 Key: YARN-941
>                 URL: https://issues.apache.org/jira/browse/YARN-941
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Robert Joseph Evans
>            Assignee: Xuan Gong
>         Attachments: YARN-941.preview.2.patch, YARN-941.preview.3.patch, YARN-941.preview.4.patch,
YARN-941.preview.patch
>
>
> When an application is submitted to the RM it includes with it a set of tokens that the
RM will renew on behalf of the application, that will be passed to the AM when the application
is launched, and will be used when launching the application to access HDFS to download files
on behalf of the application.
> For long lived applications/services these tokens can expire, and then the tokens that
the AM has will be invalid, and the tokens that the RM had will also not work to launch a
new AM.
> We need to provide an API that will allow the RM to replace the current tokens for this
application with a new set.  To avoid any real race issues, I think this API should be something
that the AM calls, so that the client can connect to the AM with a new set of tokens it got
using kerberos, then the AM can inform the RM of the new set of tokens and quickly update
its tokens internally to use these new ones.



--
This message was sent by Atlassian JIRA
(v6.2#6252)

Mime
View raw message