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https://issues.apache.org/jira/browse/HBASE-20665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16504847#comment-16504847
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Hudson commented on HBASE-20665:
--------------------------------
SUCCESS: Integrated in Jenkins build HBase-1.2-IT #1121 (See
[https://builds.apache.org/job/HBase-1.2-IT/1121/])
HBASE-20665: Changed log level of HBASE-8547 warning to debug (elserj: rev
cb6990e0d05340e535ae804619863713bc240417)
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/LruBlockCache.java
> "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, 1.2.7, 1.3.3, 2.0.1
>
> Attachments: HBASE-20665.master.001.patch,
> 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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