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https://issues.apache.org/jira/browse/HADOOP-13291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mingliang Liu updated HADOOP-13291:
-----------------------------------
Attachment: HADOOP-13291.000.patch
> Probing stats in DFSOpsCountStatistics/S3AStorageStatistics should be
> correctly implemented
> -------------------------------------------------------------------------------------------
>
> Key: HADOOP-13291
> URL: https://issues.apache.org/jira/browse/HADOOP-13291
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs
> Affects Versions: 2.8.0
> Reporter: Mingliang Liu
> Assignee: Mingliang Liu
> Attachments: HADOOP-13291.000.patch
>
>
> To probe a stat in {{StorageStatistics}}, users can use the
> {{StorageStatistics#isTracked()}} API. Currently {{DFSOpsCountStatistics}}
> implements this function wrongly. {{S3AStorageStatistics}} borrowed the same
> idea and also has the same error.
> # The {{isTracked()}} is not correctly implemented. I believe this was an
> omission in code.
> # {{isTracked()}} checks a stat with operation symbol (instead of enum name).
> {{getLongStatistics()}} should return LongStatistics iterators with symbol as
> name, instead of the enum variable name. Or else,
> {{isTracked(getLongStatistics().next().getName());}} returns false. This will
> lead to confusion.
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