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https://issues.apache.org/jira/browse/HDFS-5451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13816774#comment-13816774
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Colin Patrick McCabe commented on HDFS-5451:
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one way to support using the {{LogVerificationAppender}} in
{{testUncachingBlocksBeforeCachingFinishes}} would be to use {{Mockito}} to
detect when we had started caching on the DN, and only have the test proceed
after that.
> add more debugging for cache rescan
> -----------------------------------
>
> Key: HDFS-5451
> URL: https://issues.apache.org/jira/browse/HDFS-5451
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, namenode
> Affects Versions: 3.0.0
> Reporter: Colin Patrick McCabe
> Assignee: Andrew Wang
>
> It would be nice to have message at DEBUG level that described all the
> decisions we made for cache entries. That way we could turn on this
> debugging to get more information. We should also store the number of bytes
> each PBCE wanted, and the number of bytes it got, plus the number of inodes
> it got, and output those in {{listDirectives}}.
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