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https://issues.apache.org/jira/browse/HDFS-16958?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Takanobu Asanuma resolved HDFS-16958.
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Resolution: Not A Problem
> EC: Fix bug in processing EC excess redundancy
> -----------------------------------------------
>
> Key: HDFS-16958
> URL: https://issues.apache.org/jira/browse/HDFS-16958
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Shuyan Zhang
> Assignee: Shuyan Zhang
> Priority: Major
> Labels: pull-request-available
>
> When processing excess redundancy, the number of internal blocks is computed
> by traversing `nonExcess`. This way is not accurate, because `nonExcess`
> excludes replicas in abnormal states, such as corrupt ones, or maintenance
> ones. `numOfTarget` may be smaller than the actual value, which will result
> in inaccurate generated `excessTypes`.
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