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https://issues.apache.org/jira/browse/KAFKA-7560?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ewen Cheslack-Postava resolved KAFKA-7560.
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Resolution: Fixed
Fix Version/s: 2.1.0
2.2.0
Issue resolved by pull request 5886
[https://github.com/apache/kafka/pull/5886]
> PushHttpMetricsReporter should not convert metric value to double
> -----------------------------------------------------------------
>
> Key: KAFKA-7560
> URL: https://issues.apache.org/jira/browse/KAFKA-7560
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 2.1.0
> Reporter: Stanislav Kozlovski
> Assignee: Dong Lin
> Priority: Blocker
> Fix For: 2.2.0, 2.1.0
>
>
> Currently PushHttpMetricsReporter will convert value from
> KafkaMetric.metricValue() to double. This will not work for non-numerical
> metrics such as version in AppInfoParser whose value can be string. This has
> caused issue for PushHttpMetricsReporter which in turn caused system test
> kafkatest.tests.client.quota_test.QuotaTest.test_quota to fail with the
> following exception:
> {code:java}
> File "/opt/kafka-dev/tests/kafkatest/tests/client/quota_test.py", line 196,
> in validate metric.value for k, metrics in
> producer.metrics(group='producer-metrics', name='outgoing-byte-rate',
> client_id=producer.client_id) for metric in metrics ValueError: max() arg is
> an empty sequence
> {code}
> Since we allow metric value to be object, PushHttpMetricsReporter should also
> read metric value as object and pass it to the http server.
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