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Date: Fri, 14 Oct 2016 04:16:20 +0000 (UTC)
From: "Takanobu Asanuma (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.13001988.1472726725000.825896.1476418580482@Atlassian.JIRA>
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Subject: [jira] [Updated] (HDFS-10827) When there are unrecoverable ec block
 groups, Namenode Web UI shows "There are X missing blocks." but doesn't
 show the block names.
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archived-at: Fri, 14 Oct 2016 04:16:22 -0000


     [ https://issues.apache.org/jira/browse/HDFS-10827?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Takanobu Asanuma updated HDFS-10827:
------------------------------------
    Attachment: HDFS-10827.4.patch

I uploaded a new patch. It uses {{MiniDFSCluster#corruptReplica}}.

> 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, HDFS-10827.4.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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