terrytlu created HDFS-17840:
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Summary: NameNode UI StorageType
Key: HDFS-17840
URL: https://issues.apache.org/jira/browse/HDFS-17840
Project: Hadoop HDFS
Issue Type: Bug
Reporter: terrytlu
We found in a hadoop cluster, which has 26 nodes, while in NameNode UI, only
show 3 nodes
!image-2025-09-23-11-25-25-313.png|width=694,height=124!
we found the problem still exists after merge
https://issues.apache.org/jira/browse/HDFS-16402
Since the metrics here are calculated using real-time increments and
decrements, once a metric is corrupted, it cannot be restored. We recommend
modifying the implementation to retrieve the data from
org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManager#datanodeMap to
ensure a consistent number of nodes in service.
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