[jira] [Commented] (HDFS-9239) DataNode Lifeline Protocol: an alternative protocol for reporting DataNode liveness

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-9239?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15118590#comment-15118590 ] 

Hadoop QA commented on HDFS-9239:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 4s {color} | {color:red} HDFS-9239 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 Patch URL | https://issues.apache.org/jira/secure/attachment/12771665/HDFS-9239.001.patch |
| JIRA Issue | HDFS-9239 |
| Powered by | Apache Yetus 0.2.0-SNAPSHOT   http://yetus.apache.org |
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/14257/console |


This message was automatically generated.



> DataNode Lifeline Protocol: an alternative protocol for reporting DataNode liveness
> -----------------------------------------------------------------------------------
>
>                 Key: HDFS-9239
>                 URL: https://issues.apache.org/jira/browse/HDFS-9239
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: datanode, namenode
>            Reporter: Chris Nauroth
>            Assignee: Chris Nauroth
>         Attachments: DataNode-Lifeline-Protocol.pdf, HDFS-9239.001.patch
>
>
> This issue proposes introduction of a new feature: the DataNode Lifeline Protocol.  This is an RPC protocol that is responsible for reporting liveness and basic health information about a DataNode to a NameNode.  Compared to the existing heartbeat messages, it is lightweight and not prone to resource contention problems that can harm accurate tracking of DataNode liveness currently.  The attached design document contains more details.



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