Seweryn Habdank-Wojewodzki created KAFKA-6457:
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             Summary: 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


One of our nodes was dead. Then the second one took 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}

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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