zentol commented on code in PR #19649:
URL: https://github.com/apache/flink/pull/19649#discussion_r865638433
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flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/metrics/KafkaMetricMutableWrapper.java:
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@@ -34,7 +34,12 @@ public KafkaMetricMutableWrapper(Metric metric) {
@Override
public Double getValue() {
- return (Double) kafkaMetric.metricValue();
+ final Object metricValue = kafkaMetric.metricValue();
+ // Previously KafkaMetric supported KafkaMetric#value that always
returned a Double value.
+ // Since this method has been deprecated and is removed in future
releases we have to
+ // manually check if the returned value is Double. Internally,
KafkaMetric#value also
+ // returned 0.0 for all not "measurable" values, so we restored the
original behavior.
+ return metricValue instanceof Double ? (Double) metricValue : 0.0;
Review Comment:
Have you considered checking for `Number` and converting that to double?
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