Hi Frank, Thanks for reporting. Can you provide a sample of the join you are running?
Thanks, Damian On Thu, 13 Oct 2016 at 16:10 Frank Lyaruu <flya...@gmail.com> wrote: > Hi Kafka people, > > I'm joining a bunch of Kafka Topics using Kafka Streams, with the Kafka > 0.10.1 release candidate. > > It runs ok for a few thousand of messages, and then it dies with the > following exception: > > Exception in thread "StreamThread-1" java.lang.NullPointerException > at > > org.apache.kafka.streams.state.internals.NamedCache.evict(NamedCache.java:194) > at > > org.apache.kafka.streams.state.internals.ThreadCache.maybeEvict(ThreadCache.java:190) > at > > org.apache.kafka.streams.state.internals.ThreadCache.put(ThreadCache.java:121) > at > > org.apache.kafka.streams.state.internals.CachingKeyValueStore.get(CachingKeyValueStore.java:147) > at > > org.apache.kafka.streams.state.internals.CachingKeyValueStore.get(CachingKeyValueStore.java:134) > at > > org.apache.kafka.streams.kstream.internals.KTableReduce$KTableAggregateValueGetter.get(KTableReduce.java:121) > at > > org.apache.kafka.streams.kstream.internals.KTableKTableLeftJoin$KTableKTableLeftJoinProcessor.process(KTableKTableLeftJoin.java:77) > at > > org.apache.kafka.streams.kstream.internals.KTableKTableLeftJoin$KTableKTableLeftJoinProcessor.process(KTableKTableLeftJoin.java:48) > at > > org.apache.kafka.streams.processor.internals.ProcessorNode.process(ProcessorNode.java:82) > at > > org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forward(ProcessorContextImpl.java:204) > at > > org.apache.kafka.streams.kstream.internals.KTableFilter$KTableFilterProcessor.process(KTableFilter.java:83) > at > > org.apache.kafka.streams.kstream.internals.KTableFilter$KTableFilterProcessor.process(KTableFilter.java:73) > at > > org.apache.kafka.streams.processor.internals.ProcessorNode.process(ProcessorNode.java:82) > at > > org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forward(ProcessorContextImpl.java:204) > at > > org.apache.kafka.streams.kstream.internals.KTableFilter$KTableFilterProcessor.process(KTableFilter.java:83) > at > > org.apache.kafka.streams.kstream.internals.KTableFilter$KTableFilterProcessor.process(KTableFilter.java:73) > at > > org.apache.kafka.streams.processor.internals.ProcessorNode.process(ProcessorNode.java:82) > at > > org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forward(ProcessorContextImpl.java:204) > at > > org.apache.kafka.streams.kstream.internals.KTableKTableJoinMerger$KTableKTableJoinMergeProcessor.process(KTableKTableJoinMerger.java:52) > at > > org.apache.kafka.streams.kstream.internals.KTableKTableJoinMerger$KTableKTableJoinMergeProcessor.process(KTableKTableJoinMerger.java:49) > at > > org.apache.kafka.streams.processor.internals.ProcessorNode.process(ProcessorNode.java:82) > at > > org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forward(ProcessorContextImpl.java:204) > at > > org.apache.kafka.streams.kstream.internals.KTableKTableRightJoin$KTableKTableRightJoinProcessor.process(KTableKTableRightJoin.java:83) > at > > org.apache.kafka.streams.kstream.internals.KTableKTableRightJoin$KTableKTableRightJoinProcessor.process(KTableKTableRightJoin.java:49) > at > > org.apache.kafka.streams.processor.internals.ProcessorNode.process(ProcessorNode.java:82) > at > > org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forward(ProcessorContextImpl.java:204) > at > > org.apache.kafka.streams.kstream.internals.ForwardingCacheFlushListener.apply(ForwardingCacheFlushListener.java:35) > at > > org.apache.kafka.streams.state.internals.CachingKeyValueStore.maybeForward(CachingKeyValueStore.java:97) > at > > org.apache.kafka.streams.state.internals.CachingKeyValueStore.access$000(CachingKeyValueStore.java:34) > at > > org.apache.kafka.streams.state.internals.CachingKeyValueStore$1.apply(CachingKeyValueStore.java:84) > at > > org.apache.kafka.streams.state.internals.NamedCache.flush(NamedCache.java:117) > at > > org.apache.kafka.streams.state.internals.NamedCache.evict(NamedCache.java:196) > at > > org.apache.kafka.streams.state.internals.ThreadCache.maybeEvict(ThreadCache.java:190) > at > > org.apache.kafka.streams.state.internals.ThreadCache.put(ThreadCache.java:121) > at > > org.apache.kafka.streams.state.internals.CachingKeyValueStore.put(CachingKeyValueStore.java:187) > at > > org.apache.kafka.streams.state.internals.CachingKeyValueStore.put(CachingKeyValueStore.java:182) > at > > org.apache.kafka.streams.kstream.internals.KTableReduce$KTableReduceProcessor.process(KTableReduce.java:92) > at > > org.apache.kafka.streams.kstream.internals.KTableReduce$KTableReduceProcessor.process(KTableReduce.java:52) > at > > org.apache.kafka.streams.processor.internals.ProcessorNode.process(ProcessorNode.java:82) > at > > org.apache.kafka.streams.processor.internals.ProcessorContextImpl.forward(ProcessorContextImpl.java:204) > at > > org.apache.kafka.streams.processor.internals.SourceNode.process(SourceNode.java:66) > at > > org.apache.kafka.streams.processor.internals.StreamTask.process(StreamTask.java:177) > at > > org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:427) > at > > org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:235) > > I know this isn't a great bug report, as I can't seem to reproduce this in > a more sandboxed situation. Any tips / ideas for further steps? >
