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https://issues.apache.org/jira/browse/HBASE-22480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16849375#comment-16849375
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binlijin commented on HBASE-22480:
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[~ram_krish]
{quote}
So here there is no negative ref counting na. As per the v2 patch may be we
should add to prevBlocks and then return them?
{quote}
Yes, after the patch there is no negative ref counting.
> Get block from BlockCache once and return this block to BlockCache twice make
> ref count error.
> ----------------------------------------------------------------------------------------------
>
> Key: HBASE-22480
> URL: https://issues.apache.org/jira/browse/HBASE-22480
> Project: HBase
> Issue Type: Sub-task
> Reporter: binlijin
> Assignee: binlijin
> Priority: Major
> Attachments: HBASE-22480-master-v1.patch,
> HBASE-22480-master-v2.patch, HBASE-22480-master-v3.patch
>
>
> After debugging HBASE-22433, i find the problem it is that we get a block
> from BucketCache once and return this block to BucketCache twice and make the
> ref count error, sometimes the refCount can be negative.
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