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https://issues.apache.org/jira/browse/HDFS-13473?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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He Xiaoqiao reassigned HDFS-13473:
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Assignee: He Xiaoqiao
> DataNode update BlockKeys using mode PULL rather than PUSH from NameNode
> ------------------------------------------------------------------------
>
> Key: HDFS-13473
> URL: https://issues.apache.org/jira/browse/HDFS-13473
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Reporter: He Xiaoqiao
> Assignee: He Xiaoqiao
> Priority: Major
> Attachments: HDFS-13473-trunk.001.patch
>
>
> It is passive behavior about updating Block keys for DataNode currently, and
> it depends on if NameNode return #KeyUpdateCommand for heartbeat response.
> There are several problems of this Block keys synchronization mode:
> a. NameNode can't be sensed about if Block Keys reach DataNode successfully,
> b. It is also not sensed for DataNode who meets some exception while receive
> or process heartbeat response which include BlockKeyCommand,
> such as HDFS-13441 and HDFS-12749 mentioned.
> So I propose improve Push Block Keys from NameNode for DataNode to DataNode
> Pull Block Keys.
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