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From "Colin P. McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (KAFKA-6459) By (Re-)joining group StreamThread got NPE
Date Thu, 22 Mar 2018 00:46:00 GMT

     [ https://issues.apache.org/jira/browse/KAFKA-6459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Colin P. McCabe resolved KAFKA-6459.
------------------------------------
       Resolution: Duplicate
    Fix Version/s: 1.0.1

Duplicate of KAFKA-6260

> By (Re-)joining group StreamThread got NPE
> ------------------------------------------
>
>                 Key: KAFKA-6459
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6459
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>    Affects Versions: 1.0.0
>            Reporter: Seweryn Habdank-Wojewodzki
>            Priority: Major
>             Fix For: 1.0.1
>
>
> We encouteres more instabilities in Kafka Streams.
> By (Re-)joining group StreamThread got NPE.
> {code}
> 2018-01-18 09:48:44 INFO  AbstractCoordinator:336 - [Consumer clientId=kafka-endpoint-c1e67c77-c0c8-413d-b0f2-31f22bdeae05-StreamThread-1-consumer,
groupId=kafka-endpoint] (Re-)joining group
> 2018-01-18 09:48:44 INFO  StreamPartitionAssignor:341 - stream-thread [kafka-endpoint-c1e67c77-c0c8-413d-b0f2-31f22bdeae05-StreamThread-1-consumer]
Assigned tasks to clients as \{c1e67c77-c0c8-413d-b0f2-31f22bdeae05=[activeTasks: ([0_0, 0_1,
0_2, 0_3, 0_4, 0_5, 0_6, 0_7, 0_8, 0_9]) standbyTasks: ([]) assignedTasks: ([0_0, 0_1, 0_2,
0_3, 0_4, 0_5, 0_6, 0_7, 0_8, 0_9]) prevActiveTasks: ([0_0, 0_1, 0_2, 0_3, 0_4]) prevAssignedTasks:
([0_0, 0_1, 0_2, 0_3, 0_4]) capacity: 1]}.
> 2018-01-18 09:48:44 INFO  AbstractCoordinator:341 - [Consumer clientId=kafka-endpoint-c1e67c77-c0c8-413d-b0f2-31f22bdeae05-StreamThread-1-consumer,
groupId=kafka-endpoint] Successfully joined group with generation 3950
> 2018-01-18 09:48:44 INFO  ConsumerCoordinator:341 - [Consumer clientId=kafka-endpoint-c1e67c77-c0c8-413d-b0f2-31f22bdeae05-StreamThread-1-consumer,
groupId=kafka-endpoint] Setting newly assigned partitions [my_internal_topic-6, my_internal_topic-5,
my_internal_topic-8, my_internal_topic-7, my_internal_topic-9, my_internal_topic-0, my_internal_topic-2,
my_internal_topic-1, my_internal_topic-4, my_internal_topic-3]
> 2018-01-18 09:48:44 INFO  StreamThread:346 - stream-thread [kafka-endpoint-c1e67c77-c0c8-413d-b0f2-31f22bdeae05-StreamThread-1]
State transition from PARTITIONS_REVOKED to PARTITIONS_ASSIGNED
> 2018-01-18 09:48:44 INFO  StreamThread:351 - stream-thread [kafka-endpoint-c1e67c77-c0c8-413d-b0f2-31f22bdeae05-StreamThread-1]
partition assignment took 149 ms.
>         current active tasks: [0_0, 0_1, 0_2, 0_3, 0_4, 0_5, 0_6, 0_7, 0_8, 0_9]
>         current standby tasks: []
>         previous active tasks: [0_0, 0_1, 0_2, 0_3, 0_4]
> 2018-01-18 09:48:44 ERROR StreamThread:306 - stream-thread [kafka-endpoint-c1e67c77-c0c8-413d-b0f2-31f22bdeae05-StreamThread-1]
Encountered the following error during processing:
> java.lang.NullPointerException: null
>         at org.apache.kafka.common.network.Selector.pollSelectionKeys(Selector.java:436)
~[my-kafka-endpoint.jar:?]
>         at org.apache.kafka.common.network.Selector.poll(Selector.java:395) ~[my-kafka-endpoint.jar:?]
>         at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:460)
~[my-kafka-endpoint.jar:?]
>         at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:238)
~[my-kafka-endpoint.jar:?]
>         at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.pollNoWakeup(ConsumerNetworkClient.java:275)
~[my-kafka-endpoint.jar:?]
>         at org.apache.kafka.clients.consumer.internals.AbstractCoordinator$HeartbeatThread.run(AbstractCoordinator.java:934)
~[my-kafka-endpoint.jar:?]
> 2018-01-18 09:48:44 INFO  StreamThread:346 - stream-thread [kafka-endpoint-c1e67c77-c0c8-413d-b0f2-31f22bdeae05-StreamThread-1]
State transition from PARTITIONS_ASSIGNED to PENDING_SHUTDOWN
> {code}



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