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https://issues.apache.org/jira/browse/KAFKA-10205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17163394#comment-17163394
]
Igor Soarez commented on KAFKA-10205:
-------------------------------------
I'm happy take this one on.
> NullPointerException in StreamTask
> ----------------------------------
>
> Key: KAFKA-10205
> URL: https://issues.apache.org/jira/browse/KAFKA-10205
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Affects Versions: 2.5.0
> Reporter: Brian Forkan
> Priority: Minor
> Labels: beginner, newbie
>
> In our Kafka Streams application we have been experiencing a
> NullPointerException when deploying a new version of our application. This
> does not happen during a normal rolling restart.
> The exception is:
> {code:java}
> Error caught during partition assignment, will abort the current process and
> re-throw at the end of
> rebalance","stack_trace":"java.lang.NullPointerException: nullError caught
> during partition assignment, will abort the current process and re-throw at
> the end of rebalance","stack_trace":"java.lang.NullPointerException: null at
> org.apache.kafka.streams.processor.internals.StreamTask.<init>(StreamTask.java:186)
> at
> org.apache.kafka.streams.processor.internals.StreamTask.<init>(StreamTask.java:115)
> at
> org.apache.kafka.streams.processor.internals.StreamThread$TaskCreator.createTask(StreamThread.java:352)
> at
> org.apache.kafka.streams.processor.internals.StreamThread$TaskCreator.createTask(StreamThread.java:310)
> at
> org.apache.kafka.streams.processor.internals.StreamThread$AbstractTaskCreator.createTasks(StreamThread.java:295)
> at
> org.apache.kafka.streams.processor.internals.TaskManager.addNewActiveTasks(TaskManager.java:160)
> at
> org.apache.kafka.streams.processor.internals.TaskManager.createTasks(TaskManager.java:120)
> at
> org.apache.kafka.streams.processor.internals.StreamsRebalanceListener.onPartitionsAssigned(StreamsRebalanceListener.java:77)
> at
> org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.invokePartitionsAssigned(ConsumerCoordinator.java:278)
> at
> org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.onJoinComplete(ConsumerCoordinator.java:419)
> at
> org.apache.kafka.clients.consumer.internals.AbstractCoordinator.joinGroupIfNeeded(AbstractCoordinator.java:439)
> at
> org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureActiveGroup(AbstractCoordinator.java:358)
> at
> org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:490)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.updateAssignmentMetadataIfNeeded(KafkaConsumer.java:1275)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1243)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1173)
> at brave.kafka.clients.TracingConsumer.poll(TracingConsumer.java:86) at
> brave.kafka.clients.TracingConsumer.poll(TracingConsumer.java:80) at
> org.apache.kafka.streams.processor.internals.StreamThread.pollRequests(StreamThread.java:853)
> at
> org.apache.kafka.streams.processor.internals.StreamThread.runOnce(StreamThread.java:753)
> at
> org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:697)
> at
> org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:670)
> {code}
> And the relevant lines of code -
> [https://github.com/apache/kafka/blob/2.5/streams/src/main/java/org/apache/kafka/streams/processor/internals/StreamTask.java#L184-L196]
> I suspect "topology.source(partition.topic());" is returning null.
> Has anyone experienced this issue before? I suspect there is a problem with
> our topology but I can't replicate this on my machine so I can't tell.
>
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