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https://issues.apache.org/jira/browse/KAFKA-17850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17891821#comment-17891821
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Bruno Cadonna commented on KAFKA-17850:
---------------------------------------
[~sebviale], [~loicgreffier], and [~Dabz] I think that is related to KIP-1033.
> Stop leaking internal exception to StreamsUncaughtExceptionHandler
> ------------------------------------------------------------------
>
> Key: KAFKA-17850
> URL: https://issues.apache.org/jira/browse/KAFKA-17850
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 3.9.0
> Reporter: Bruno Cadonna
> Priority: Major
>
> In a log file of a Streams application I found the following log line:
> {code:java}
> [2024-10-08 16:45:03,846] ERROR [i-0ec21c43346d0de25-StreamThread-2]
> stream-client [i-0ec21c43346d0de25] Replacing thread in the streams uncaught
> exception handler (org.apache.kafka.streams.KafkaStreams)
> org.apache.kafka.streams.errors.internals.FailedProcessingException
> at
> org.apache.kafka.streams.processor.internals.ProcessorNode.process(ProcessorNode.java:237)
> at
> org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forwardInternal(ProcessorContextImpl.java:291)
> at
> org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forward(ProcessorContextImpl.java:270)
> at
> org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forward(ProcessorContextImpl.java:229)
> at
> org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forward(ProcessorContextImpl.java:216)
> at
> org.apache.kafka.streams.kstream.internals.KStreamMapValues$KStreamMapProcessor.process(KStreamMapValues.java:42)
> at
> org.apache.kafka.streams.processor.internals.ProcessorNode.process(ProcessorNode.java:180)
> at
> org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forwardInternal(ProcessorContextImpl.java:291)
> at
> org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forward(ProcessorContextImpl.java:270)
> at
> org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forward(ProcessorContextImpl.java:229)
> at
> org.apache.kafka.streams.kstream.internals.TimestampedCacheFlushListener.apply(TimestampedCacheFlushListener.java:45)
> at
> org.apache.kafka.streams.state.internals.MeteredWindowStore.lambda$setFlushListener$5(MeteredWindowStore.java:163)
> at
> org.apache.kafka.streams.state.internals.CachingWindowStore.putAndMaybeForward(CachingWindowStore.java:113)
> at
> org.apache.kafka.streams.state.internals.CachingWindowStore.lambda$init$0(CachingWindowStore.java:86)
> at
> org.apache.kafka.streams.state.internals.NamedCache.flush(NamedCache.java:159)
> at
> org.apache.kafka.streams.state.internals.NamedCache.flush(NamedCache.java:117)
> at
> org.apache.kafka.streams.state.internals.ThreadCache.flush(ThreadCache.java:148)
> at
> org.apache.kafka.streams.state.internals.CachingWindowStore.flushCache(CachingWindowStore.java:414)
> at
> org.apache.kafka.streams.state.internals.WrappedStateStore.flushCache(WrappedStateStore.java:79)
> at
> org.apache.kafka.streams.processor.internals.ProcessorStateManager.flushCache(ProcessorStateManager.java:537)
> at
> org.apache.kafka.streams.processor.internals.StreamTask.flush(StreamTask.java:423)
> at
> org.apache.kafka.streams.processor.internals.StreamTask.prepareCommit(StreamTask.java:447)
> at
> org.apache.kafka.streams.processor.internals.TaskExecutor.commitTasksAndMaybeUpdateCommittableOffsets(TaskExecutor.java:147)
> at
> org.apache.kafka.streams.processor.internals.TaskManager.commitTasksAndMaybeUpdateCommittableOffsets(TaskManager.java:1925)
> at
> org.apache.kafka.streams.processor.internals.TaskManager.commit(TaskManager.java:1892)
> at
> org.apache.kafka.streams.processor.internals.StreamThread.maybeCommit(StreamThread.java:1382)
> at
> org.apache.kafka.streams.processor.internals.StreamThread.runOnceWithoutProcessingThreads(StreamThread.java:1034)
> at
> org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:712)
> at
> org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:672)
> Caused by:
> org.apache.kafka.streams.StreamsSoakTest$ThrowableValueProcessorSupplier$ThreadReplaceableException
> at
> org.apache.kafka.streams.StreamsSoakTest$ThrowableValueProcessorSupplier$KaboomableValueProcessor.process(StreamsSoakTest.java:618)
> at
> org.apache.kafka.streams.processor.internals.ProcessorNode.process(ProcessorNode.java:180)
> ... 28 more
> {code}
> That indicates that the internal exception {{FailedProcessingException}} is
> passed to the Streams-specific uncaught exception handler. Streams should not
> pass internal exceptions to a public API that is supposed to be implemented
> by the user since that means the user needs to be aware of an internal
> exception.
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