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https://issues.apache.org/jira/browse/HDFS-10827?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15569512#comment-15569512
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Jing Zhao commented on HDFS-10827:
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[~tasanuma0829], I think you're right. We actually do not need to add that
extra check there.
> When there are unrecoverable ec block groups, Namenode Web UI shows "There
> are X missing blocks." but doesn't show the block names.
> -----------------------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-10827
> URL: https://issues.apache.org/jira/browse/HDFS-10827
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: erasure-coding
> Reporter: Takanobu Asanuma
> Assignee: Takanobu Asanuma
> Attachments: HDFS-10827.1.patch, HDFS-10827.2.patch,
> HDFS-10827.3.patch, case_2.png, case_3.png
>
>
> For RS-6-3, when there is one ec block group and
> 1) 0~3 out of 9 internal blocks are missing, NN Web UI doesn't show any warns.
> 2) 4~8 out of 9 internal blocks are missing, NN Web UI shows "There are 1
> missing blocks." but doesn't show the block names. (please see case_2.png)
> 3) 9 out of 9 internal blocks are missing, NN Web UI shows "There are 1
> missing blocks." and also shows the block name. (please see case_3.png)
> We should fix the case 2). I think NN Web UI should show the block names
> since the ec block group is unrecoverable.
> The values come from JMX. "There are X missing blocks." is
> {{NumberOfMissingBlocks}} and the block names are {{CorruptFiles}}.
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