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https://issues.apache.org/jira/browse/HDFS-7165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14159566#comment-14159566
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Philip Zeyliger commented on HDFS-7165:
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Seems like we should also expose this in JMX. See
{{hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeMXBean.java}}.
> Separate block metrics for files with replication count 1
> ---------------------------------------------------------
>
> Key: HDFS-7165
> URL: https://issues.apache.org/jira/browse/HDFS-7165
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Andrew Wang
> Assignee: Zhe Zhang
> Attachments: HDFS-7165-20141003-v1.patch
>
>
> We see a lot of escalations because someone has written teragen output with a
> replication factor of 1, a DN goes down, and a bunch of missing blocks show
> up. These are normally false positives, since teragen output is disposable,
> and generally speaking, users should understand this is true for all repl=1
> files.
> It'd be nice to be able to separate out these repl=1 missing blocks from
> missing blocks with higher replication factors..
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