[jira] [Commented] (KAFKA-13626) NullPointerException in Selector.pollSelectionKeys: channel is null

["Kvicii.Yu (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-13626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17485879#comment-17485879 ] 

Kvicii.Yu commented on KAFKA-13626:
-----------------------------------

[~haeuserd]  

Thanks for your report, but what exactly do you mean by network issue, I don't think this should be counted as an issue.

> NullPointerException in Selector.pollSelectionKeys: channel is null
> -------------------------------------------------------------------
>
>                 Key: KAFKA-13626
>                 URL: https://issues.apache.org/jira/browse/KAFKA-13626
>             Project: Kafka
>          Issue Type: Bug
>          Components: consumer
>    Affects Versions: 2.7.1
>            Reporter: Daniel Häuser
>            Priority: Minor
>
> This NullPointerException occured while we were having networking issues.
> Unfortunately I cannot provide much more information than this stack trace because this is all I got from our operations team.
> {code:java}
> java.lang.IllegalStateException: This error handler cannot process 'java.lang.NullPointerException's; no record information is available
>         at org.springframework.kafka.listener.SeekUtils.seekOrRecover(SeekUtils.java:200)
>         at org.springframework.kafka.listener.SeekToCurrentErrorHandler.handle(SeekToCurrentErrorHandler.java:112)
>         at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.handleConsumerException(KafkaMessageListenerContainer.java:1599)
>         at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.run(KafkaMessageListenerContainer.java:1210)
>         at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
>         at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
>         at java.base/java.lang.Thread.run(Thread.java:831)
> Caused by: java.lang.NullPointerException: Cannot invoke "org.apache.kafka.common.network.KafkaChannel.id()" because "channel" is null
>         at org.apache.kafka.common.network.Selector.pollSelectionKeys(Selector.java:516)
>         at org.apache.kafka.common.network.Selector.poll(Selector.java:481)
>         at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:563)
>         at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:265)
>         at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:236)
>         at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:227)
>         at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.awaitMetadataUpdate(ConsumerNetworkClient.java:164)
>         at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureCoordinatorReady(AbstractCoordinator.java:257)
>         at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:480)
>         at org.apache.kafka.clients.consumer.KafkaConsumer.updateAssignmentMetadataIfNeeded(KafkaConsumer.java:1257)
>         at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1226)
>         at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1206)
>         at jdk.internal.reflect.GeneratedMethodAccessor128.invoke(Unknown Source)
>         at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.base/java.lang.reflect.Method.invoke(Method.java:567)
>         at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)
>         at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)
>         at jdk.proxy2/jdk.proxy2.$Proxy137.poll(Unknown Source)
>         at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doPoll(KafkaMessageListenerContainer.java:1410)
>         at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.pollAndInvoke(KafkaMessageListenerContainer.java:1249)
>         at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.run(KafkaMessageListenerContainer.java:1161)
>         ... 3 common frames omitted {code}



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