hudeqi commented on code in PR #14077:
URL: https://github.com/apache/kafka/pull/14077#discussion_r1314592488


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connect/mirror/src/main/java/org/apache/kafka/connect/mirror/MirrorSourceMetrics.java:
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@@ -104,12 +108,25 @@ class MirrorSourceMetrics implements AutoCloseable {
         replicationLatencyAvg = new MetricNameTemplate(
                 "replication-latency-ms-avg", SOURCE_CONNECTOR_GROUP,
                 "Average time it takes records to replicate from source to 
target cluster.", partitionTags);
+        replicationOffsetLag = new MetricNameTemplate(

Review Comment:
   I guess we have a disagreement about lag? My understanding of lag is: the 
real LEO of the source cluster partition minus the LEO that has been written to 
the target cluster. It seems that your definition of lag is: the lag between 
the mirror task getting data from consumption and writing it to the target 
cluster?



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