Github user JoshRosen commented on the pull request:
https://github.com/apache/spark/pull/2917#issuecomment-60491248
Ah, okay; that makes sense. I just wanted to figure out whether this could
explain errors / failures in typical user jobs.
> On Oct 25, 2014, at 9:34 AM, andrewor14 <[email protected]> wrote:
>
> @JoshRosen this is only a problem if your memory size is too small.
There's a limit before which we start unrolling blocks, and if the thread can't
even reserve up to that limit, then we simply give up unrolling a block without
even trying. In practice, this mostly happens when we try to make small
BlockManagers in tests.
>
> â
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