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https://issues.apache.org/jira/browse/HDFS-16540?focusedWorklogId=761028&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-761028
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ASF GitHub Bot logged work on HDFS-16540:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 22/Apr/22 19:04
Start Date: 22/Apr/22 19:04
Worklog Time Spent: 10m
Work Description: huaxiangsun commented on code in PR #4170:
URL: https://github.com/apache/hadoop/pull/4170#discussion_r856498429
##########
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestDatanodeManager.java:
##########
@@ -138,6 +138,35 @@ public void testNumVersionsCorrectAfterReregister()
mapToCheck.get("version1").intValue(), 1);
}
+ /**
+ * This test checks that if a node is re-registered with a different ip, its
+ * host2DatanodeMap is correctly updated with the new ip.
+ */
+ @Test
Review Comment:
Yeah, the NetworkTopology map is another map. It is quite complicated to add
a unittest for it. I am going to leave to hdfs experts to decide if a unittest
is needed.
Issue Time Tracking
-------------------
Worklog Id: (was: 761028)
Time Spent: 2h 40m (was: 2.5h)
> 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
> Time Spent: 2h 40m
> 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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