Anastasia Braginsky commented on HBASE-18375:

[~anoop.hbase], [~ram_krish], [~eshcar], and everybody!

I am publishing the patch where the non-pooled chunks are covered by stong-map 
only when MSLAB tells them to do so, and this based on whether this specific 
MSLAB is related to CompactingMemStore that works with CellChunkMap. This looks 
to me like an optimal solution takes into consideration everything. The patch 
is published here and on RB, please take a look and let me know what do you 


> The pool chunks from ChunkCreator are deallocated while in pool because there 
> is no reference to them
> -----------------------------------------------------------------------------------------------------
>                 Key: HBASE-18375
>                 URL: https://issues.apache.org/jira/browse/HBASE-18375
>             Project: HBase
>          Issue Type: Sub-task
>    Affects Versions: 2.0.0-alpha-1
>            Reporter: Anastasia Braginsky
>            Assignee: Anastasia Braginsky
>            Priority: Critical
>             Fix For: 2.0.0, 3.0.0, 2.0.0-alpha-2
>         Attachments: HBASE-18375-V01.patch, HBASE-18375-V02.patch, 
> HBASE-18375-V03.patch, HBASE-18375-V04.patch, HBASE-18375-V05.patch
> Because MSLAB list of chunks was changed to list of chunk IDs, the chunks 
> returned back to pool can be deallocated by JVM because there is no reference 
> to them. The solution is to protect pool chunks from GC by the strong map of 
> ChunkCreator introduced by HBASE-18010. Will prepare the patch today.

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