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https://issues.apache.org/jira/browse/FLINK-27487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17560852#comment-17560852
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Arseniy Tashoyan commented on FLINK-27487:
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Hi [~fpaul]
Should we apply the same fix to KafkaMetricWrapper?
https://github.com/apache/flink/blob/dfdf7afb047d1b8af581883bf208e4d8a30a116f/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/metrics/KafkaMetricWrapper.java#L35
> 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
> Assignee: Fabian Paul
> Priority: Blocker
> Labels: pull-request-available
> 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.
> This results in these metrics throwing exceptions, which generally breaks the
> reporter mechanism completely.
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