[KAFKA-6459] By (Re-)joining group StreamThread got NPE

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 1.0.0
• Fix Version/s: 1.0.1
• Component/s: streams
• Assignee: Unassigned
• Reporter: Seweryn Habdank-Wojewodzki
• Created: 18/Jan/18 09:18
• Updated: 31/Aug/18 06:14
• Resolved: 22/Mar/18 00:45

Description

We encouteres more instabilities in Kafka Streams.

By (Re-)joining group StreamThread got NPE.

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

Issue Links

• Blocked: KAFKA-6260 AbstractCoordinator not clearly handles NULL Exception