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https://issues.apache.org/jira/browse/HBASE-20665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16503640#comment-16503640
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Hadoop QA commented on HBASE-20665:
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| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m
0s{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} docker {color} | {color:red} 1m
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|| Subsystem || Report/Notes ||
| JIRA Issue | HBASE-20665 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12926755/HBASE-20665.master.001.patch
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| Console output |
https://builds.apache.org/job/PreCommit-HBASE-Build/13112/console |
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This message was automatically generated.
> "Already cached block XXX" message should be DEBUG
> --------------------------------------------------
>
> Key: HBASE-20665
> URL: https://issues.apache.org/jira/browse/HBASE-20665
> Project: HBase
> Issue Type: Task
> Components: BlockCache
> Affects Versions: 1.2.0, 2.0.0
> Reporter: Sean Busbey
> Assignee: Eric Maynard
> Priority: Minor
> Labels: beginner
> Fix For: 3.0.0, 2.1.0, 1.5.0, 1.2.7, 1.3.3, 1.4.5
>
> Attachments: HBASE-20665.master.001.patch
>
>
> Testing a local cluster that relies on the LruBlockCache for a scan-heavy
> workload and I'm getting a bunch of log entries at WARN
> {code}
> 2018-05-30 12:28:47,192 WARN org.apache.hadoop.hbase.io.hfile.LruBlockCache:
> Cached an already cached block: df01f5bf6a244f6bb1a626b927377fff_54780812
> cb:df01f5bf6a244f6bb1a626b927377fff_54780812. This is harmless and can happen
> in rare cases (see HBASE-8547)
> {code}
> As the log message notes (and the code confirms) this is a harmless result of
> contention for getting a block into the CHM. the message should be at DEBUG.
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