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https://issues.apache.org/jira/browse/HBASE-20789?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16524872#comment-16524872
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Zheng Hu commented on HBASE-20789:
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bq. then we check ramCache, it is not there either, then we put it into the
writer queue and cause recaching an existent block...
Yes , it's true. it may cache two diff blocks with the same key into
io-engine, but only one BucketEntry in the backingMap ....
> TestBucketCache#testCacheBlockNextBlockMetadataMissing is flaky
> ---------------------------------------------------------------
>
> Key: HBASE-20789
> URL: https://issues.apache.org/jira/browse/HBASE-20789
> Project: HBase
> Issue Type: Bug
> Reporter: Zheng Hu
> Assignee: Zheng Hu
> Priority: Major
> Attachments: bucket-33718.out
>
>
> The UT failed frequently in our internal branch-2... Will dig into the UT.
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