noob-se7en opened a new pull request, #16740:
URL: https://github.com/apache/pinot/pull/16740

   Post this PR: https://github.com/apache/pinot/pull/16657 and this PR: 
https://github.com/apache/pinot/pull/15190
   recentlyOffloadedConsumingSegments cache is not required.
   
   This cache was added with reason: 
   ```
     // NOTE: Helix might process CONSUMING -> DROPPED transition as 2 separate 
transitions: CONSUMING -> OFFLINE followed
     // by OFFLINE -> DROPPED. Use this cache to track the segments that just 
went through CONSUMING -> OFFLINE transition
     // to detect CONSUMING -> DROPPED transition.
     // TODO: Check how Helix handle CONSUMING -> DROPPED transition and remove 
this cache if it's not needed.
   ```
   
   This cache was used to detect when `CONSUMING -> OFFLINE` was followed by 
`OFFLINE -> DROPPED`. And when it's detected, the ingestion metrics are 
removed. However after this PR: https://github.com/apache/pinot/pull/16657, the 
ingestion metrics are removed in `CONSUMING -> OFFLINE` transition itself 
(`onConsumingToDropped(tableNameWithType, segmentName)` is similar to 
`onConsumingToOffline(realtimeTableName, segmentName)`).
   
   Also now we have direct transition from CONSUMING -> DROPPED after this PR: 
https://github.com/apache/pinot/pull/15190
   


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