Copilot commented on code in PR #16745:
URL: https://github.com/apache/pinot/pull/16745#discussion_r2319710165


##########
docker/images/pinot/etc/jmx_prometheus_javaagent/configs/pinot.yml:
##########
@@ -592,10 +592,38 @@ rules:
     table: "$1$3"
     tableType: "$4"
     partition: "$5"
-  #grpc related metrics
+#grpc related metrics
 - pattern: 
"\"org\\.apache\\.pinot\\.common\\.metrics\"<type=\"ServerMetrics\", 
name=\"pinot\\.server\\.grpc(.+)\"><>(\\w+)"
   name: "pinot_server_grpc$1_$2"
   cache: true
+# Kafka Consumer Metrics with Scope-based Approach
+# Consumer-level metrics (most aggregated, usually most reliable)
+- pattern: "kafka\\.consumer<type=consumer-fetch-manager-metrics, 
client-id=([^,]+)_REALTIME-([^,]+)-(\\d+)><>(fetch-rate|fetch-latency-avg|fetch-throttle-time-avg|bytes-consumed-rate|records-consumed-rate|fetch-size-avg|fetch-size-max|records-per-request-avg)"
+  name: "kafka_consumer_$4"
+  cache: true
+  labels:
+    table: "$1"
+    topic_name: "$2"
+    partition: "$3"
+    scope: "consumer"
+# Topic-level metrics (includes topic information from MBean)
+- pattern: "kafka\\.consumer<type=consumer-fetch-manager-metrics, 
client-id=(.+)_REALTIME-(.+)-(\\d+), 
topic=([^\"]+)><>(bytes-consumed-rate|records-consumed-rate|fetch-size-avg|fetch-size-max|records-per-request-avg)"
+  name: "kafka_consumer_$5"
+  cache: true
+  labels:
+    table: "$1"
+    topic_name: "$2"
+    partition: "$3"

Review Comment:
   The partition label is incorrectly mapped to capture group $3 from the 
client-id pattern, but this pattern should use the actual topic partition from 
the MBean's partition attribute ($5) to ensure accurate partition labeling for 
topic-level metrics.
   ```suggestion
       partition: "$5"
   ```



##########
docker/images/pinot/etc/jmx_prometheus_javaagent/configs/server.yml:
##########
@@ -85,3 +85,31 @@ rules:
   name: "pinot_$1_$2_$3"
   cache: true
 
+# Kafka Consumer Metrics with Scope-based Approach
+# Consumer-level metrics (most aggregated, usually most reliable)
+- pattern: "kafka\\.consumer<type=consumer-fetch-manager-metrics, 
client-id=([^,]+)_REALTIME-([^,]+)-(\\d+)><>(fetch-rate|fetch-latency-avg|fetch-throttle-time-avg|bytes-consumed-rate|records-consumed-rate|fetch-size-avg|fetch-size-max|records-per-request-avg)"
+  name: "kafka_consumer_$4"
+  cache: true
+  labels:
+    table: "$1"
+    topic_name: "$2"
+    partition: "$3"
+    scope: "consumer"
+# Topic-level metrics (includes topic information from MBean)
+- pattern: "kafka\\.consumer<type=consumer-fetch-manager-metrics, 
client-id=(.+)_REALTIME-(.+)-(\\d+), 
topic=([^\"]+)><>(bytes-consumed-rate|records-consumed-rate|fetch-size-avg|fetch-size-max|records-per-request-avg)"
+  name: "kafka_consumer_$5"
+  cache: true
+  labels:
+    table: "$1"
+    topic_name: "$2"
+    partition: "$3"

Review Comment:
   The partition label is incorrectly mapped to capture group $3 from the 
client-id pattern, but this pattern should use the actual topic partition from 
the MBean's partition attribute ($5) to ensure accurate partition labeling for 
topic-level metrics.
   ```suggestion
       partition: "$5"
   ```



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