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https://issues.apache.org/jira/browse/HDFS-5189?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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J.Andreina updated HDFS-5189:
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Attachment: HDFS-5189.1.patch
Attached an initial patch.
Please review.
> Rename the "CorruptBlocks" metric to "CorruptReplicas"
> ------------------------------------------------------
>
> Key: HDFS-5189
> URL: https://issues.apache.org/jira/browse/HDFS-5189
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Affects Versions: 2.1.0-beta
> Reporter: Harsh J
> Assignee: J.Andreina
> Priority: Minor
> Attachments: HDFS-5189.1.patch
>
>
> The NameNode increments a "CorruptBlocks" metric even if only one of the
> block's
> replicas is reported corrupt (genuine checksum fail, or even if a
> replica has a bad genstamp). In cases where this is incremented, fsck
> still reports a healthy state.
> This is confusing to users and causes false alarm as they feel this is to be
> monitored (instead of MissingBlocks). The metric is truly trying to report
> only corrupt replicas, not whole blocks, and ought to be renamed.
> FWIW, the "dfsadmin -report" reports a proper string of "Blocks with corrupt
> replicas:" when printing this count.
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