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https://issues.apache.org/jira/browse/HDFS-16540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17770545#comment-17770545
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Rushabh Shah commented on HDFS-16540:
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> I'll let folks ask for the backport before doing it for branch-3.3.
Since the patch here fixes the incident that caused data loss in our production
env, I would prefer we backport the patch to all active branches. [~stack]
WDYT? I can create a patch if you are busy.
> Data locality is lost when DataNode pod restarts in kubernetes
> ---------------------------------------------------------------
>
> Key: HDFS-16540
> URL: https://issues.apache.org/jira/browse/HDFS-16540
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 3.3.2
> Reporter: Huaxiang Sun
> Assignee: Huaxiang Sun
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0
>
> Time Spent: 8h 20m
> Remaining Estimate: 0h
>
> We have HBase RegionServer and Hdfs DataNode running in one pod. When the pod
> restarts, we found that data locality is lost after we do a major compaction
> of hbase regions. After some debugging, we found that upon pod restarts, its
> ip changes. In DatanodeManager, maps like networktopology are updated with
> the new info. host2DatanodeMap is not updated accordingly. When hdfs client
> with the new ip tries to find a local DataNode, it fails.
>
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