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https://issues.apache.org/jira/browse/HDFS-6965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14135469#comment-14135469
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Kihwal Lee commented on HDFS-6965:
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Filed HDFS-7069 for TestMissingBlocksAlert.
+1 for the patch

> NN continues to issue block locations for DNs with full disks
> -------------------------------------------------------------
>
>                 Key: HDFS-6965
>                 URL: https://issues.apache.org/jira/browse/HDFS-6965
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 2.0.0-alpha, 3.0.0
>            Reporter: Daryn Sharp
>            Assignee: Rushabh S Shah
>         Attachments: HDFS-6965.patch
>
>
> Encountered issues where DNs have less space than a full block and reject 
> incoming transfers.  The NN continues giving out locations for these nodes 
> for some period of time.  It does not appear to be related to the DN's cached 
> disk usage.
> One impact is required replications are delayed when a full DN is chosen for 
> the pipeline.  A DN cannot report a broken pipeline so the replication must 
> timeout (5m) before new targets are chosen.



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