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Posted to dev@kafka.apache.org by "Mark Shelton (JIRA)" <ji...@apache.org> on 2016/10/20 18:07:58 UTC
[jira] [Resolved] (KAFKA-4324) NullPointerException in
StreamTask.forward
[ https://issues.apache.org/jira/browse/KAFKA-4324?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mark Shelton resolved KAFKA-4324.
---------------------------------
Resolution: Invalid
Marked as invalid.
By accident my processor was singleton-like internally and the "context.forward" was invoking a another processor's context.
> NullPointerException in StreamTask.forward
> ------------------------------------------
>
> Key: KAFKA-4324
> URL: https://issues.apache.org/jira/browse/KAFKA-4324
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 0.10.0.1
> Reporter: Mark Shelton
> Assignee: Guozhang Wang
> Priority: Minor
>
> I have a custom processor "MyProcessor extends AbstractProcessor<String, Object>". The processor receives a message and transforms it and calls "context.forward". This sometimes results in below exception. It seems to occur when there are multiple messages available for processing.
> Stack trace:
> java.lang.NullPointerException
> at org.apache.kafka.streams.processor.internals.StreamTask.forward(StreamTask.java:341)
> at org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forward(ProcessorContextImpl.java:187)
> at xx.xx.xx.xx.xx.xx.xx.lambda$xx$1(xx.java:63)
> ....
> at xx.xx.xx.xx.xx.process(MyProcessor.java:16)
> at org.apache.kafka.streams.processor.internals.ProcessorNode.process(ProcessorNode.java:68)
> at org.apache.kafka.streams.processor.internals.StreamTask.forward(StreamTask.java:343)
> at org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forward(ProcessorContextImpl.java:187)
> at org.apache.kafka.streams.processor.internals.SourceNode.process(SourceNode.java:64)
> at org.apache.kafka.streams.processor.internals.StreamTask.process(StreamTask.java:174)
> at org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:320)
> at org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:218)
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