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https://issues.apache.org/jira/browse/HDFS-16540?focusedWorklogId=756643&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-756643
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ASF GitHub Bot logged work on HDFS-16540:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 13/Apr/22 19:51
Start Date: 13/Apr/22 19:51
Worklog Time Spent: 10m
Work Description: huaxiangsun opened a new pull request, #4170:
URL: https://github.com/apache/hadoop/pull/4170
…etes
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### Description of PR
When Dn with the same uuid is registered with a different ip,
host2DatanodeMap needs to be updated accordingly.
### How was this patch tested?
Tested 3.3.2 with the patch on a eks cluster, restarted the pod hosting
DataNode and HBase region server. After that, doing a major compaction of Hbase
region, made sure that locality is kept.
There is also a new unittest case added.
### For code changes:
- [ ] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
Issue Time Tracking
-------------------
Worklog Id: (was: 756643)
Remaining Estimate: 0h
Time Spent: 10m
> 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
> Time Spent: 10m
> 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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