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From "Robert Joseph Evans (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-896) Roll up for long lived YARN
Date Fri, 09 Aug 2013 16:50:48 GMT

    [ https://issues.apache.org/jira/browse/YARN-896?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13734983#comment-13734983
] 

Robert Joseph Evans commented on YARN-896:
------------------------------------------

Sorry I have not responded sooner.  I have been out on vacation and had a high severity issue
that has consumed a lot of my time.

[~lmccay] and [~thw] There are many different services that long lived processes need to communicate
with.  Many of these services use tokens and others may not.  Each of these tokens or other
credentials are specific to the services being accessed.  In some cases like with HBase we
probably can take advantage of the existing renewal feature in the RM.  With other tokens
or credentials it may be different, and may require AM specific support for them. I am not
really that concerned with solving the renewal problem for all possible credentials here,
although if we can solve this for a lot of common tokens at the same time that would be great.
What I care most about is being sure that a long lived YARN application does not necessarily
have to stop and restart because an HDFS token cannot be renewed any longer.  If there are
changes going into the HDFS security model that would make YARN-941 unnecessary that is great.
 I have not had much time to follow the security discussion so thank you for pointing this
out.  But it is also a question of time frames.  YARN-941 and YARN-1041 would allow for secure,
robust, long lived applications on YARN, and do not appear to be that difficult to accomplish.
 Do you know the time frame for the security rework?
                
> Roll up for long lived YARN
> ---------------------------
>
>                 Key: YARN-896
>                 URL: https://issues.apache.org/jira/browse/YARN-896
>             Project: Hadoop YARN
>          Issue Type: New Feature
>            Reporter: Robert Joseph Evans
>
> YARN is intended to be general purpose, but it is missing some features to be able to
truly support long lived applications and long lived containers.
> This ticket is intended to
>  # discuss what is needed to support long lived processes
>  # track the resulting JIRA.

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