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https://issues.apache.org/jira/browse/HDFS-13473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16739075#comment-16739075
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Hadoop QA commented on HDFS-13473:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m  
0s{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red}  0m  7s{color} 
| {color:red} HDFS-13473 does not apply to trunk. Rebase required? Wrong 
Branch? See https://wiki.apache.org/hadoop/HowToContribute for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | HDFS-13473 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12928199/HDFS-13473-trunk.005.patch
 |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/25948/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> 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, HDFS-13473-trunk.002.patch, 
> HDFS-13473-trunk.003.patch, HDFS-13473-trunk.004.patch, 
> HDFS-13473-trunk.005.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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