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https://issues.apache.org/jira/browse/KAFKA-7565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16770216#comment-16770216
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Matthias J. Sax commented on KAFKA-7565:
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[~rsivaram] [~hachikuji] What is the status? Because there are two unresolved
blocker for 2.2, I would be willing to accept this for 2.2 if we can resolve it
before the blockers are merged. Any time estimation for this ticket?
> NPE in KafkaConsumer
> --------------------
>
> Key: KAFKA-7565
> URL: https://issues.apache.org/jira/browse/KAFKA-7565
> Project: Kafka
> Issue Type: Bug
> Components: clients
> Affects Versions: 1.1.1
> Reporter: Alexey Vakhrenev
> Priority: Critical
> Fix For: 2.2.0
>
>
> The stacktrace is
> {noformat}
> java.lang.NullPointerException
> at
> org.apache.kafka.clients.consumer.internals.Fetcher$1.onSuccess(Fetcher.java:221)
> at
> org.apache.kafka.clients.consumer.internals.Fetcher$1.onSuccess(Fetcher.java:202)
> at
> org.apache.kafka.clients.consumer.internals.RequestFuture.fireSuccess(RequestFuture.java:167)
> at
> org.apache.kafka.clients.consumer.internals.RequestFuture.complete(RequestFuture.java:127)
> at
> org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient$RequestFutureCompletionHandler.fireCompletion(ConsumerNetworkClient.java:563)
> at
> org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.firePendingCompletedRequests(ConsumerNetworkClient.java:390)
> at
> org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:244)
> at
> org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:233)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:1171)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1115)
> {noformat}
> Couldn't find minimal reproducer, but it happens quite often in our system.
> We use {{pause()}} and {{wakeup()}} methods quite extensively, maybe it is
> somehow related.
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