Matthias J. Sax created KAFKA-19638:
---------------------------------------
Summary: NPE in `Processor#init()` accessing state store
Key: KAFKA-19638
URL: https://issues.apache.org/jira/browse/KAFKA-19638
Project: Kafka
Issue Type: Bug
Components: streams
Affects Versions: 4.2.0
Reporter: Matthias J. Sax
Fix For: 4.2.0
As reported on the dev mailing list, we introduced a regression bug via
https://issues.apache.org/jira/browse/KAFKA-13722 in 4.1 branch. We did revert
the commit
([https://github.com/apache/kafka/commit/f13a22af0b3a48a4ca1bf2ece5b58f31e3b26b7d])
for 4.1 release, and want to fix-forward for 4.2 release.
Stacktrace:
{code:java}
15:29:05 ERROR [STREAMS] KafkaStreams - stream-client [app1] Encountered the
following exception during processing and the registered exception handler
opted to SHUTDOWN_CLIENT. The streams client is going to shut down now.
org.apache.kafka.streams.errors.StreamsException: failed to initialize
processor random-value-processor
at
org.apache.kafka.streams.processor.internals.ProcessorNode.init(ProcessorNode.java:132)
~[kafka-streams-4.2.0-SNAPSHOT.jar:?]
at
org.apache.kafka.streams.processor.internals.ProcessorNode.init(ProcessorNode.java:141)
~[kafka-streams-4.2.0-SNAPSHOT.jar:?]
at
org.apache.kafka.streams.processor.internals.StreamTask.initializeTopology(StreamTask.java:1109)
~[kafka-streams-4.2.0-SNAPSHOT.jar:?]
at
org.apache.kafka.streams.processor.internals.StreamTask.completeRestoration(StreamTask.java:297)
~[kafka-streams-4.2.0-SNAPSHOT.jar:?]
at
org.apache.kafka.streams.processor.internals.TaskManager.tryToCompleteRestoration(TaskManager.java:955)
~[kafka-streams-4.2.0-SNAPSHOT.jar:?]
at
org.apache.kafka.streams.processor.internals.StreamThread.initializeAndRestorePhase(StreamThread.java:1417)
~[kafka-streams-4.2.0-SNAPSHOT.jar:?]
at
org.apache.kafka.streams.processor.internals.StreamThread.runOnceWithoutProcessingThreads(StreamThread.java:1219)
~[kafka-streams-4.2.0-SNAPSHOT.jar:?]
at
org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:934)
~[kafka-streams-4.2.0-SNAPSHOT.jar:?]
at
org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:894)
[kafka-streams-4.2.0-SNAPSHOT.jar:?]
Caused by: java.lang.NullPointerException: Cannot invoke
"org.apache.kafka.streams.processor.internals.ProcessorRecordContext.timestamp()"
because the return value of
"org.apache.kafka.streams.processor.internals.InternalProcessorContext.recordContext()"
is null
at
org.apache.kafka.streams.state.internals.ChangeLoggingKeyValueBytesStore.put(ChangeLoggingKeyValueBytesStore.java:69)
~[kafka-streams-4.2.0-SNAPSHOT.jar:?]
at
org.apache.kafka.streams.state.internals.ChangeLoggingKeyValueBytesStore.put(ChangeLoggingKeyValueBytesStore.java:32)
~[kafka-streams-4.2.0-SNAPSHOT.jar:?]
at
org.apache.kafka.streams.state.internals.MeteredKeyValueStore.lambda$put$6(MeteredKeyValueStore.java:303)
~[kafka-streams-4.2.0-SNAPSHOT.jar:?]
at
org.apache.kafka.streams.processor.internals.metrics.StreamsMetricsImpl.maybeMeasureLatency(StreamsMetricsImpl.java:901)
~[kafka-streams-4.2.0-SNAPSHOT.jar:?]
at
org.apache.kafka.streams.state.internals.MeteredKeyValueStore.put(MeteredKeyValueStore.java:303)
~[kafka-streams-4.2.0-SNAPSHOT.jar:?]
at
org.apache.kafka.streams.processor.internals.AbstractReadWriteDecorator$KeyValueStoreReadWriteDecorator.put(AbstractReadWriteDecorator.java:123)
~[kafka-streams-4.2.0-SNAPSHOT.jar:?]
at
io.littlehorse.simulations.stateful.app.RandomValueProcessor.init(RandomValueProcessor.java:21)
~[kafka-streams-stateful-unspecified.jar:?]
at
org.apache.kafka.streams.processor.internals.ProcessorNode.init(ProcessorNode.java:124)
~[kafka-streams-4.2.0-SNAPSHOT.jar:?]
... 8 more {code}
Thanks [~eduwerc] for reporting the issue.
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