If it's not too late, I'd like to bring your attention to YARN-1692.

We get a ConcurrentModificationException with the fair scheduler when it
updates demand, and we saw RM get into a pretty bad shape around the time
this happened. It would be great if this could make 2.3.0. I provided a
patch for this fix already.

Thoughts?

Thanks,
Sangjin
On Wed, Feb 12, 2014 at 11:41 AM, Stack <[EMAIL PROTECTED]> wrote:
 
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