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https://issues.apache.org/jira/browse/HBASE-23258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17065188#comment-17065188
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Nick Dimiduk commented on HBASE-23258:
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Bump [~openinx], [~binlijin] – status update?
> Reconsider the DBB memory leak in the exceptional paths.
> --------------------------------------------------------
>
> Key: HBASE-23258
> URL: https://issues.apache.org/jira/browse/HBASE-23258
> Project: HBase
> Issue Type: Bug
> Reporter: Zheng Hu
> Assignee: Zheng Hu
> Priority: Major
> Fix For: 3.0.0, 2.3.0
>
>
> Have a discussion with [~anoop.hbase], we find still have some exceptional
> paths which we did not handle DBB#release correctly. More details are the
> following:
> {code}
> > HFileReaderImpl#validateBlockType - When throws Exception, the get block is
> > gone. Want to return?
> Yeah, we've two cases to validateBlockType. one is reading from cache,
> another one is reading from hfile.
> we've abstracted the block for both cache types and hfiles ( ex release the
> block from heap will donothing), so
> here seems we should do release if throws IOException.
> > Only inside another condition we return and evict block
> readBlock - The got block is unused when we throw Exception on DBE type
> mismatch
> Em..we return null finally , seems the block also need to release the block.
> {code}
> Will take a look around all the exceptional paths and consider any other DBB
> leak issues.
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