FrankChen021 commented on code in PR #18525:
URL: https://github.com/apache/druid/pull/18525#discussion_r3986236730


##########
extensions-core/kafka-indexing-service/src/main/java/org/apache/druid/indexing/kafka/KafkaIndexTaskIOConfig.java:
##########
@@ -66,7 +68,8 @@ public KafkaIndexTaskIOConfig(
       @JsonProperty("configOverrides") @Nullable KafkaConfigOverrides 
configOverrides,
       @JsonProperty("multiTopic") @Nullable Boolean multiTopic,
       @JsonProperty("refreshRejectionPeriodsInMinutes") Long 
refreshRejectionPeriodsInMinutes,
-      @JsonProperty("boundedStreamConfig") @Nullable BoundedStreamConfig 
boundedStreamConfig
+      @JsonProperty("boundedStreamConfig") @Nullable BoundedStreamConfig 
boundedStreamConfig,
+      @JsonProperty("headerBasedFilterConfig") @Nullable 
KafkaHeaderBasedFilterConfig headerBasedFilterConfig

Review Comment:
   [P1] Preserve the previous full constructor signature
   
   Adding `headerBasedFilterConfig` changes the public 17-argument 
constructor's JVM descriptor. The overload added below only preserves the 
separate 12-argument convenience constructor, so extensions or other callers 
compiled against the previous full signature fail with `NoSuchMethodError` even 
when filtering is unused. Retain an overload with the old argument list that 
delegates with a null filter.



##########
processing/src/main/java/org/apache/druid/segment/incremental/RowIngestionMetersTotals.java:
##########
@@ -44,32 +45,66 @@ public RowIngestionMetersTotals(
       @JsonProperty("processedWithError") long processedWithError,
       @JsonProperty("thrownAway") long thrownAway,
       @JsonProperty("thrownAwayByReason") @Nullable Map<String, Long> 
thrownAwayByReason,
-      @JsonProperty("unparseable") long unparseable
+      @JsonProperty("unparseable") long unparseable,
+      @JsonProperty("filtered") long filtered

Review Comment:
   [P1] Retain the old totals constructor overload
   
   Adding `filtered` changes the public JSON-creator constructor from `(long, 
long, long, long, Map<String, Long>, long)` to a seven-argument signature, but 
no six-argument overload with both `thrownAway` and `thrownAwayByReason` 
remains. Already-compiled callers using the previous constructor will fail with 
`NoSuchMethodError` (and source callers will no longer compile); keep that 
overload and default `filtered` to zero.



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