rangareddy commented on issue #15114:
URL: https://github.com/apache/hudi/issues/15114#issuecomment-5056928892

   This issue was reviewed as part of the JIRA-migrated backlog triage.
   
   This describes an enhancement, not a bug: after Hudi COW relations moved 
from Spark's `HadoopFsRelation` to `BaseFileOnlyRelation`, Spark plans surface 
a generic scan node instead of a `FileScan`, so file-scanning metrics (# files 
scanned, total bytes scanned, etc.) are no longer reported. Spark decides 
FileScan vs generic DataScan based on `HadoopFsRelation`, which Hudi no longer 
uses.
   
   Status: no fix has been merged, and `BaseFileOnlyRelation` is still in use 
on current master, so the metrics gap remains. Keeping open as an unimplemented 
observability improvement. If anyone plans to pick this up, restoring the 
equivalent scan metrics on Hudi's custom relations is the ask.


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