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https://issues.apache.org/jira/browse/HDFS-17901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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yue.wang updated HDFS-17901:
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Description: In DFSNetworkTopology#getEligibleChildren(), when iterating
over excludedNodes, the method only handles DatanodeDescriptor and
DFSTopologyNodeImpl types but misses the DatanodeInfo type. This causes
storageCount to be incorrectly calculated (overestimated), leading to
inconsistency with the parent method chooseRandomWithStorageType() and
potentially incorrect weighted random node selection.
> Fix DFSNetworkTopology#getEligibleChildren missing DatanodeInfo handling
> causing incorrect storageCount
> -------------------------------------------------------------------------------------------------------
>
> Key: HDFS-17901
> URL: https://issues.apache.org/jira/browse/HDFS-17901
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs
> Affects Versions: 3.4.3
> Reporter: yue.wang
> Priority: Major
>
> In DFSNetworkTopology#getEligibleChildren(), when iterating over
> excludedNodes, the method only handles DatanodeDescriptor and
> DFSTopologyNodeImpl types but misses the DatanodeInfo type. This causes
> storageCount to be incorrectly calculated (overestimated), leading to
> inconsistency with the parent method chooseRandomWithStorageType() and
> potentially incorrect weighted random node selection.
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