smjn commented on code in PR #18174:
URL: https://github.com/apache/kafka/pull/18174#discussion_r1887249722


##########
share-coordinator/src/main/java/org/apache/kafka/coordinator/share/metrics/ShareCoordinatorMetrics.java:
##########
@@ -46,6 +48,8 @@ public class ShareCoordinatorMetrics extends 
CoordinatorMetrics implements AutoC
 
     public static final String SHARE_COORDINATOR_WRITE_SENSOR_NAME = 
"ShareCoordinatorWrite";
     public static final String SHARE_COORDINATOR_WRITE_LATENCY_SENSOR_NAME = 
"ShareCoordinatorWriteLatency";
+    public static final String SHARE_COORDINATOR_STATE_TOPIC_PRUNE_SENSOR_NAME 
= "ShareCoordinatorStateTopicPruneSensorName";
+    private Map<TopicPartition, ShareGroupPruneMetrics> pruneMetrics = new 
HashMap<>();

Review Comment:
   This will be called from single threaded context. There is a single instance 
of share coordinator. Will change to `concurrent`, nevertheless.



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