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https://issues.apache.org/jira/browse/HBASE-23056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16934182#comment-16934182
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zbq.dean commented on HBASE-23056:
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Ping [~reidchan] [~anoop.hbase].
> Block count is 0 when BucketCache using persistent IOEngine and retrieve from
> file
> -----------------------------------------------------------------------------------
>
> Key: HBASE-23056
> URL: https://issues.apache.org/jira/browse/HBASE-23056
> Project: HBase
> Issue Type: Bug
> Components: BucketCache
> Affects Versions: 1.5.0, 2.2.1, master
> Reporter: zbq.dean
> Priority: Major
> Attachments: after_RS_restart.png, before_RS_restart.png
>
>
> We use FileIOEngine to store and read block data in BucketCache. Before stop
> RS, the BucketCache metrics in WebUI is like before_RS_restart.png, the block
> count is 3. When stop RS, the backing map is persistent to file. And then
> start RS, the metrics is like after_RS_restart.png, the block count is 0, but
> the size of blocks is correct.
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