Huaxiang Sun created HDFS-16540:
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Summary: 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
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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