Chesnay Schepler created FLINK-27487:
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Summary: KafkaMetricWrappers do incorrect cast
Key: FLINK-27487
URL: https://issues.apache.org/jira/browse/FLINK-27487
Project: Flink
Issue Type: Bug
Components: Connectors / Kafka, Runtime / Metrics
Affects Versions: 1.15.0
Reporter: Chesnay Schepler
Fix For: 1.16.0, 1.15.1
In FLINK-24765 the kafka metric wrappers that bridge kafka metrics into our
metric system were migrated from the deprecated {{KafkaMetric#value}} to
{{#metricValue}}.
This migration was done incorrectly. It was assumed that #metricValue behaves
similar to #value in that it always returns a double, but this is not the case,
as they may also return longs or strings.
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