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https://issues.apache.org/jira/browse/KAFKA-17478?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chia-Ping Tsai resolved KAFKA-17478.
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Fix Version/s: 4.0.0
Resolution: Fixed
> Wrong configuration of metric.reporters lead to NPE in KafkaProducer
> constructor
> --------------------------------------------------------------------------------
>
> Key: KAFKA-17478
> URL: https://issues.apache.org/jira/browse/KAFKA-17478
> Project: Kafka
> Issue Type: Bug
> Components: clients
> Affects Versions: 3.7.0, 3.8.0, 3.7.1
> Reporter: Fred Rouleau
> Assignee: Fred Rouleau
> Priority: Minor
> Fix For: 4.0.0
>
> Original Estimate: 10m
> Remaining Estimate: 10m
>
> if the metric.reporters property contains some invalid class, the
> KafkaProducer constructor fails with non explicit NPE:
> {code:java}
> Exception in thread "main" java.lang.NullPointerException: Cannot invoke
> "java.util.Optional.ifPresent(java.util.function.Consumer)" because
> "this.clientTelemetryReporter" is null
> at
> org.apache.kafka.clients.producer.KafkaProducer.close(KafkaProducer.java:1424)
> at
> org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:472)
> at
> org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:295)
> at
> org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:322)
> at
> org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:307)
> at org.frouleau.kafka.clients.Produce.sendAvroSpecific(Produce.java:89)
> at org.frouleau.kafka.clients.Produce.main(Produce.java:63){code}
> This behavior was introduced by KAFKA-15901 implementing KIP-714.
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