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https://issues.apache.org/jira/browse/HDFS-8492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15611650#comment-15611650
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Hudson commented on HDFS-8492:
------------------------------

FAILURE: Integrated in Jenkins build Hadoop-trunk-Commit #10702 (See 
[https://builds.apache.org/job/Hadoop-trunk-Commit/10702/])
HDFS-8492. DN should notify NN when client requests a missing block 
(vinayakumarb: rev 1cf6ec4ad4e1f4ea71f912923b5e8627b61ef482)
* (edit) 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockSender.java
* (edit) 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
* (edit) 
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDatanodeReport.java


> DN should notify NN when client requests a missing block
> --------------------------------------------------------
>
>                 Key: HDFS-8492
>                 URL: https://issues.apache.org/jira/browse/HDFS-8492
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.0.0-alpha
>            Reporter: Daryn Sharp
>            Assignee: Walter Su
>             Fix For: 2.8.0, 2.9.0, 3.0.0-alpha2
>
>         Attachments: HDFS-8492-02.patch, HDFS-8492.01.patch
>
>
> If the DN has a block its volume map but not on-disk, it tells clients it's 
> an invalid block id.  The NN is not informed of the missing block until 
> either the bp slice scanner or the directory scanner detects the missing 
> block.  DN should remove the replica from the volume map and inform the NN.



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