vrajat commented on code in PR #12157:
URL: https://github.com/apache/pinot/pull/12157#discussion_r1473760338


##########
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/realtime/PinotLLCRealtimeSegmentManager.java:
##########
@@ -1339,7 +1346,14 @@ private StreamPartitionMsgOffset 
selectStartOffset(OffsetCriteria offsetCriteria
         LOGGER.error("Data lost from offset: {} to: {} for partition: {} of 
table: {}", startOffsetInSegmentZkMetadata,
             streamSmallestOffset, partitionGroupId, tableName);
         _controllerMetrics.addMeteredTableValue(tableName, 
ControllerMeter.LLC_STREAM_DATA_LOSS, 1L);
-        return streamSmallestOffset;
+        String message = "Data lost from offset: " + 
startOffsetInSegmentZkMetadata
+                        + " to: " + streamSmallestOffset
+                        + " for partition: " + partitionGroupId
+                        + " of table: " + tableName;
+
+        _errorCache.put(Pair.of(tableName, segmentName),
+            new SegmentErrorInfo(String.valueOf(System.currentTimeMillis()), 
message, ""));

Review Comment:
   Made this change locally.



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