[jira] [Commented] (HBASE-22480) Get block from BlockCache once and return this block to BlockCache twice make ref count error.

["Anoop Sam John (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-22480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16968058#comment-16968058 ] 

Anoop Sam John commented on HBASE-22480:
----------------------------------------

Not sure whether the latest patch still applies.  But here was my +1 some time back .
bq.Patch LGTM. Great find.

> 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: Lijin Bin
>            Assignee: Lijin Bin
>            Priority: Major
>         Attachments: HBASE-22480-master-v1.patch, HBASE-22480-master-v2.patch, HBASE-22480-master-v3.patch, HBASE-22480-master-v4.patch, HBASE-22480-master-v5.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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