sjvanrossum commented on code in PR #33073:
URL: https://github.com/apache/beam/pull/33073#discussion_r1837098083


##########
sdks/java/io/kafka/src/main/java/org/apache/beam/sdk/io/kafka/ReadFromKafkaDoFn.java:
##########
@@ -665,6 +665,9 @@ private Map<String, Object> overrideBootstrapServersConfig(
     return config;
   }
 
+  // TODO: Collapse the two moving average trackers into a single accumulator 
using a single Guava
+  // AtomicDouble. Note that this requires that a single thread will call 
update and that while get
+  // may be called by multiple threads the method must only load the 
accumulator itself.
   private static class AverageRecordSize {
     private MovingAvg avgRecordSize;

Review Comment:
   Added and annotated the class with `@ThreadSafe`.



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