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https://issues.apache.org/jira/browse/HDFS-4212?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Brandon Li resolved HDFS-4212.
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Resolution: Duplicate
> NameNode can't differentiate between a never-created block and a block which
> is really missing
> ----------------------------------------------------------------------------------------------
>
> Key: HDFS-4212
> URL: https://issues.apache.org/jira/browse/HDFS-4212
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 1.2.0, 3.0.0
> Reporter: Brandon Li
> Assignee: Brandon Li
> Attachments: hdfs-4212-junit-test.patch
>
>
> In one test case, NameNode allocated a block and then was killed before the
> client got the addBlock response.
> After NameNode restarted, the block which was never created was considered as
> a missing block and FSCK would report the file is corrupted.
> The problem seems to be that, NameNode can't differentiate between a
> never-created block and a block which is really missing.
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