SongYadong commented on issue #23497: [SPARK-26578][CORE] Synchronize putBytes's memory allocation and putting block on memoryManager URL: https://github.com/apache/spark/pull/23497#issuecomment-457453790 > In your test, no blocks in entries when task 2 try to evict blocks, right ? So, how can we say _we evicted all entries but still got smaller free space_ ? From my view, task 2 does not evict any blocks, so it can not accquire enough free memory. For simple, my test puts only one block(block1) into it. If we put some blocks into entries before putting block1, task 2 will evict them _all_ first. So we can say we evicted all entries but still got smaller free space than whole pool size?
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