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Posted to dev@kafka.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2016/12/14 13:10:59 UTC
[jira] [Commented] (KAFKA-4539) NPE in StreamThread when creating
StandbyTasks
[ https://issues.apache.org/jira/browse/KAFKA-4539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15748306#comment-15748306 ]
ASF GitHub Bot commented on KAFKA-4539:
---------------------------------------
GitHub user dguy opened a pull request:
https://github.com/apache/kafka/pull/2255
KAFKA-4539: NPE in StreamThread when creating StandbyTasks
Tasks that don't have any `StateStore`s wont have a `StandbyTask`, so `createStandbyTask` can return `null`. We need to check for this in `StandbyTaskCreator.createTask(...)`
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dguy/kafka kafka-4539
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/2255.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2255
----
commit aa1e6b7ce213ccb6019b7f16e9148cad00cf66f9
Author: Damian Guy <da...@gmail.com>
Date: 2016-12-14T13:08:40Z
fix NPE when creating standby tasks
----
> NPE in StreamThread when creating StandbyTasks
> ----------------------------------------------
>
> Key: KAFKA-4539
> URL: https://issues.apache.org/jira/browse/KAFKA-4539
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 0.10.2.0
> Reporter: Damian Guy
> Assignee: Damian Guy
> Fix For: 0.10.2.0
>
>
> Fails because {{createStandbyTask(..)}} can return null fi the topology for the {{TaskId}} doesn't have any state stores.
> {code}
> [2016-12-14 12:20:29,758] ERROR [StreamThread-1] User provided listener org.apache.kafka.streams.processor.internals.StreamThread$1 for group kafka-music-charts failed on partition assignment (org.apache.kafka.clients.consumer.internals.ConsumerCoordinator)
> java.lang.NullPointerException
> at org.apache.kafka.streams.processor.internals.StreamThread$StandbyTaskCreator.createTask(StreamThread.java:1241)
> at org.apache.kafka.streams.processor.internals.StreamThread$AbstractTaskCreator.retryWithBackoff(StreamThread.java:1188)
> at org.apache.kafka.streams.processor.internals.StreamThread.addStandbyTasks(StreamThread.java:915)
> at org.apache.kafka.streams.processor.internals.StreamThread.access$400(StreamThread.java:72)
> at org.apache.kafka.streams.processor.internals.StreamThread$1.onPartitionsAssigned(StreamThread.java:239)
> at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.onJoinComplete(ConsumerCoordinator.java:230)
> at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.joinGroupIfNeeded(AbstractCoordinator.java:314)
> at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureActiveGroup(AbstractCoordinator.java:278)
> at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:261)
> at org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:1022)
> at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:987)
> at org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:568)
> at org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:357)
> {code}
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