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https://issues.apache.org/jira/browse/HDFS-9390?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15579027#comment-15579027
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Hadoop QA commented on HDFS-9390:
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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 5s{color}
| {color:red} HDFS-9390 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-9390 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12833626/HDFS-9390-5.patch |
| Console output |
https://builds.apache.org/job/PreCommit-HDFS-Build/17173/console |
| Powered by | Apache Yetus 0.4.0-SNAPSHOT http://yetus.apache.org |
This message was automatically generated.
> Block management for maintenance states
> ---------------------------------------
>
> Key: HDFS-9390
> URL: https://issues.apache.org/jira/browse/HDFS-9390
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Ming Ma
> Assignee: Ming Ma
> Attachments: HDFS-9390-2.patch, HDFS-9390-3.patch, HDFS-9390-4.patch,
> HDFS-9390-5.patch, HDFS-9390.patch
>
>
> When a node is transitioned to/stay in/transitioned out of maintenance state,
> we need to make sure blocks w.r.t. that nodes are properly handled.
> * When nodes are put into maintenance, it will first go to
> ENTERING_MAINTENANCE, and make sure blocks are minimally replicated before
> the nodes are transitioned to IN_MAINTENANCE.
> * Do not replica blocks when nodes are in maintenance states. Maintenance
> replica will remain in BlockMaps and thus is still considered valid from
> block replication point of view. In other words, putting a node to
> “maintenance” mode won’t trigger BlockManager to replicate its blocks.
> * Do not invalidate replicas on node under maintenance. After any file's
> replication factor is reduced, NN needs to invalidate some replicas. It
> should exclude nodes under maintenance in the handling.
> * Do not put IN_MAINTENANCE replicas in LocatedBlock for read operation.
> * Do not allocate any new block on nodes under maintenance.
> * Have Balancer exclude nodes under maintenance.
> * Exclude nodes under maintenance for DN cache.
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