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https://issues.apache.org/jira/browse/HBASE-27888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17734056#comment-17734056
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chaijunjie commented on HBASE-27888:
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[~zhangduo] Thanks for reviewing, I filled the release note.
> Record readBlock message in log when it takes too long time
> -----------------------------------------------------------
>
> Key: HBASE-27888
> URL: https://issues.apache.org/jira/browse/HBASE-27888
> Project: HBase
> Issue Type: Improvement
> Components: HFile
> Affects Versions: 2.5.3
> Reporter: chaijunjie
> Assignee: chaijunjie
> Priority: Minor
> Fix For: 2.6.0, 2.5.6, 3.0.0-beta-1
>
>
> After HBASE-15160， we can record the readBlock message by TRACE log in
> org.apache.hadoop.hbase.io.hfile.HFileBlock.FSReaderImpl#readBlockDataInternal，
> But it record all read block message in TRACE log， some times， we only focus
> the block read cost too much time..
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