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https://issues.apache.org/jira/browse/HBASE-4026?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13054205#comment-13054205
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Todd Lipcon commented on HBASE-4026:
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It's also not hard to just implement this... if you are OK with special casing
for different JDKs, you just need to grab the {{cleaner}} member and call
{{clean}}. I do this in hadoop-lzo (apache license).
> Use JNA to allocate buffers in the block cache
> ----------------------------------------------
>
> Key: HBASE-4026
> URL: https://issues.apache.org/jira/browse/HBASE-4026
> Project: HBase
> Issue Type: Improvement
> Components: regionserver
> Reporter: Jason Rutherglen
> Priority: Minor
>
> The HBase block cache can be problematic because it is unpredictable when
> Java will reclaim the unused byte arrays using garbage collection.
> JNA (Java Native Access from Sun/Oracle) provides one possible way to solve
> this problem.
> https://github.com/twall/jna
> Memory is the name of the class that can be used to test the implementation.
> https://github.com/twall/jna/blob/master/src/com/sun/jna/Memory.java
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