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https://issues.apache.org/jira/browse/KAFKA-6457?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias J. Sax reopened KAFKA-6457:
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> Error: NOT_LEADER_FOR_PARTITION leads to NPE
> --------------------------------------------
>
> Key: KAFKA-6457
> URL: https://issues.apache.org/jira/browse/KAFKA-6457
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 1.0.0
> Reporter: Seweryn Habdank-Wojewodzki
> Priority: Major
> Fix For: 1.0.1
>
>
> One of our nodes was dead. Then the second one tooks all responsibility.
> But streamming aplication in the meanwhile crashed due to NPE caused by
> {{Error: NOT_LEADER_FOR_PARTITION}}.
> The stack trace is below.
>
> Is it something expected?
>
> {code:java}
> 2018-01-17 11:47:21 [my] [WARN ] Sender:251 - [Producer ...2018-01-17
> 11:47:21 [my] [WARN ] Sender:251 - [Producer
> clientId=restreamer-my-fef07ca9-b067-45c0-a5af-68b5a1730dac-StreamThread-1-producer]
> Got error produce response with correlation id 768962 on topic-partition
> my_internal_topic-5, retrying (9 attempts left). Error:
> NOT_LEADER_FOR_PARTITION
> 2018-01-17 11:47:21 [my] [WARN ] Sender:251 - [Producer
> clientId=restreamer-my-fef07ca9-b067-45c0-a5af-68b5a1730dac-StreamThread-1-producer]
> Got error produce response with correlation id 768962 on topic-partition
> my_internal_topic-7, retrying (9 attempts left). Error:
> NOT_LEADER_FOR_PARTITION
> 2018-01-17 11:47:21 [my] [ERROR] AbstractCoordinator:296 - [Consumer
> clientId=restreamer-my-fef07ca9-b067-45c0-a5af-68b5a1730dac-StreamThread-1-consumer,
> groupId=restreamer-my] Heartbeat thread for group restreamer-my failed due
> to unexpected error
> java.lang.NullPointerException: null
> at
> org.apache.kafka.common.network.Selector.pollSelectionKeys(Selector.java:436)
> ~[my-restreamer.jar:?]
> at org.apache.kafka.common.network.Selector.poll(Selector.java:395)
> ~[my-restreamer.jar:?]
> at
> org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:460)
> ~[my-restreamer.jar:?]
> at
> org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:238)
> ~[my-restreamer.jar:?]
> at
> org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.pollNoWakeup(ConsumerNetworkClient.java:275)
> ~[my-restreamer.jar:?]
> at
> org.apache.kafka.clients.consumer.internals.AbstractCoordinator$HeartbeatThread.run(AbstractCoordinator.java:934)
> [my-restreamer.jar:?]
> {code}
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