[
https://issues.apache.org/jira/browse/KAFKA-9518?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Murilo Tavares updated KAFKA-9518:
----------------------------------
Description:
I have a KafkaStreams that dinamically builds a topology based on a Map of
input-to-output topics. Since the map was not sorted, iteration was
unpredictable, and different instances could have different orders. When this
happen, KafkaStreams throws an exception during REBALANCE.
I was able to reproduce this using the attached java project. The project is a
pretty simple Maven project with one class. It starts 2 instances in parallel,
with the same input-to-output topics, but one instance takes the topics in a
reversed order.
The exception is this:
{noformat}
Exception in thread
"MY-APP-81e9dc0b-1459-4499-93d6-b5c03da60e18-StreamThread-1"
org.apache.kafka.streams.errors.StreamsException: stream-thread
[MY-APP-81e9dc0b-1459-4499-93d6-b5c03da60e18-StreamThread-1] Failed to
rebalance. at
org.apache.kafka.streams.processor.internals.StreamThread.pollRequests(StreamThread.java:852)
at
org.apache.kafka.streams.processor.internals.StreamThread.runOnce(StreamThread.java:743)
at
org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:698)
at
org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:671)
Caused by: java.lang.NullPointerException at
org.apache.kafka.streams.processor.internals.StreamTask.<init>(StreamTask.java:234)
at
org.apache.kafka.streams.processor.internals.StreamTask.<init>(StreamTask.java:176)
at
org.apache.kafka.streams.processor.internals.StreamThread$TaskCreator.createTask(StreamThread.java:355)
at
org.apache.kafka.streams.processor.internals.StreamThread$TaskCreator.createTask(StreamThread.java:313)
at
org.apache.kafka.streams.processor.internals.StreamThread$AbstractTaskCreator.createTasks(StreamThread.java:298)
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:272)
at
org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.onJoinComplete(ConsumerCoordinator.java:400)
at
org.apache.kafka.clients.consumer.internals.AbstractCoordinator.joinGroupIfNeeded(AbstractCoordinator.java:421)
at
org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureActiveGroup(AbstractCoordinator.java:340)
at
org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:471)
at
org.apache.kafka.clients.consumer.KafkaConsumer.updateAssignmentMetadataIfNeeded(KafkaConsumer.java:1267)
at
org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1231)
at
org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1211)
at
org.apache.kafka.streams.processor.internals.StreamThread.pollRequests(StreamThread.java:843)
... 3 more{noformat}
In my actual project, I fixed the issue by sorting the topics map accordingly,
but it would be nice to have at least a better error handling in this case.
was:
I have a KafkaStreams that dinamically builds a topology based on a Map of
input-to-output topics. Since the map was not sorted, iteration was
unpredictable, and different instances could have different orders. When this
happen, KafkaStreams throws an exception during REBALANCE.
I was able to reproduce this using the attached java project. The project is a
pretty simple Maven project with one class. It starts 2 instances in parallel,
with the same input-to-output topics, but one instance takes the topics in a
reversed order.
The exception is this:
{noformat}
Exception in thread
"MY-APP-81e9dc0b-1459-4499-93d6-b5c03da60e18-StreamThread-1"
org.apache.kafka.streams.errors.StreamsException: stream-thread
[MY-APP-81e9dc0b-1459-4499-93d6-b5c03da60e18-StreamThread-1] Failed to
rebalance. at
org.apache.kafka.streams.processor.internals.StreamThread.pollRequests(StreamThread.java:852)
at
org.apache.kafka.streams.processor.internals.StreamThread.runOnce(StreamThread.java:743)
at
org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:698)
at
org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:671)
Caused by: java.lang.NullPointerException at
org.apache.kafka.streams.processor.internals.StreamTask.<init>(StreamTask.java:234)
at
org.apache.kafka.streams.processor.internals.StreamTask.<init>(StreamTask.java:176)
at
org.apache.kafka.streams.processor.internals.StreamThread$TaskCreator.createTask(StreamThread.java:355)
at
org.apache.kafka.streams.processor.internals.StreamThread$TaskCreator.createTask(StreamThread.java:313)
at
org.apache.kafka.streams.processor.internals.StreamThread$AbstractTaskCreator.createTasks(StreamThread.java:298)
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:272)
at
org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.onJoinComplete(ConsumerCoordinator.java:400)
at
org.apache.kafka.clients.consumer.internals.AbstractCoordinator.joinGroupIfNeeded(AbstractCoordinator.java:421)
at
org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureActiveGroup(AbstractCoordinator.java:340)
at
org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:471)
at
org.apache.kafka.clients.consumer.KafkaConsumer.updateAssignmentMetadataIfNeeded(KafkaConsumer.java:1267)
at
org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1231)
at
org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1211)
at
org.apache.kafka.streams.processor.internals.StreamThread.pollRequests(StreamThread.java:843)
... 3 more{noformat}
> NullPointerException on out-of-order topologies
> -----------------------------------------------
>
> Key: KAFKA-9518
> URL: https://issues.apache.org/jira/browse/KAFKA-9518
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 2.4.0, 2.3.1
> Reporter: Murilo Tavares
> Priority: Minor
> Attachments: kafka-streams-testing.zip
>
>
> I have a KafkaStreams that dinamically builds a topology based on a Map of
> input-to-output topics. Since the map was not sorted, iteration was
> unpredictable, and different instances could have different orders. When this
> happen, KafkaStreams throws an exception during REBALANCE.
>
> I was able to reproduce this using the attached java project. The project is
> a pretty simple Maven project with one class. It starts 2 instances in
> parallel, with the same input-to-output topics, but one instance takes the
> topics in a reversed order.
>
> The exception is this:
> {noformat}
> Exception in thread
> "MY-APP-81e9dc0b-1459-4499-93d6-b5c03da60e18-StreamThread-1"
> org.apache.kafka.streams.errors.StreamsException: stream-thread
> [MY-APP-81e9dc0b-1459-4499-93d6-b5c03da60e18-StreamThread-1] Failed to
> rebalance. at
> org.apache.kafka.streams.processor.internals.StreamThread.pollRequests(StreamThread.java:852)
> at
> org.apache.kafka.streams.processor.internals.StreamThread.runOnce(StreamThread.java:743)
> at
> org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:698)
> at
> org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:671)
> Caused by: java.lang.NullPointerException at
> org.apache.kafka.streams.processor.internals.StreamTask.<init>(StreamTask.java:234)
> at
> org.apache.kafka.streams.processor.internals.StreamTask.<init>(StreamTask.java:176)
> at
> org.apache.kafka.streams.processor.internals.StreamThread$TaskCreator.createTask(StreamThread.java:355)
> at
> org.apache.kafka.streams.processor.internals.StreamThread$TaskCreator.createTask(StreamThread.java:313)
> at
> org.apache.kafka.streams.processor.internals.StreamThread$AbstractTaskCreator.createTasks(StreamThread.java:298)
> 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:272)
> at
> org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.onJoinComplete(ConsumerCoordinator.java:400)
> at
> org.apache.kafka.clients.consumer.internals.AbstractCoordinator.joinGroupIfNeeded(AbstractCoordinator.java:421)
> at
> org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureActiveGroup(AbstractCoordinator.java:340)
> at
> org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:471)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.updateAssignmentMetadataIfNeeded(KafkaConsumer.java:1267)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1231)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1211)
> at
> org.apache.kafka.streams.processor.internals.StreamThread.pollRequests(StreamThread.java:843)
> ... 3 more{noformat}
>
> In my actual project, I fixed the issue by sorting the topics map
> accordingly, but it would be nice to have at least a better error handling in
> this case.
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