Hi I have the latest source code Master. I think the refactoring you were doing on State Backend gives this issue, unless the example is not supposed to work With rocksdb. At some point collected records's values are null, giving the error..
What do you think? Best, Ovidiu -----Original Message----- From: Till Rohrmann [mailto:trohrm...@apache.org] Sent: Friday, October 21, 2016 2:09 PM To: dev@flink.apache.org Subject: Re: TopSpeedWindowing - in error: Could not forward element to next operator Hi Ovidiu, which version of Flink are you using? Cheers, Till On Thu, Oct 20, 2016 at 6:38 PM, Ovidiu Cristian Marcu < ovidiu.cristian.ma...@huawei.com> wrote: > Could you check the following issue on master? > > When running this example org.apache.flink.streaming.examples.windowing. > TopSpeedWindowing > With default configuration I have no errors. > > When I change the state backend with RocksDB I receive this error: > > java.lang.RuntimeException: Could not forward element to next operator > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$ > CopyingChainingOutput.collect(OperatorChain.java:388) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$ > ChainingOutput.collect(OperatorChain.java:1) > at org.apache.flink.streaming.api.operators. > AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java: > 393) > at org.apache.flink.streaming.api.operators. > AbstractStreamOperator$CountingOutput.collect( > AbstractStreamOperator.java:1) > at org.apache.flink.streaming.api.operators. > TimestampedCollector.collect(TimestampedCollector.java:51) > at org.apache.flink.streaming.api.functions.windowing. > PassThroughWindowFunction.apply(PassThroughWindowFunction.java:32) > at org.apache.flink.streaming.api.functions.windowing. > ReduceApplyWindowFunction.apply(ReduceApplyWindowFunction.java:56) > at org.apache.flink.streaming.runtime.operators.windowing. > functions.InternalIterableWindowFunction.apply( > InternalIterableWindowFunction.java:50) > at org.apache.flink.streaming.runtime.operators.windowing. > functions.InternalIterableWindowFunction.apply( > InternalIterableWindowFunction.java:1) > at org.apache.flink.streaming.runtime.operators.windowing. > EvictingWindowOperator.fire(EvictingWindowOperator.java:334) > at org.apache.flink.streaming.runtime.operators.windowing. > EvictingWindowOperator.processElement(EvictingWindowOperator.java:199) > at org.apache.flink.streaming.runtime.io. > StreamInputProcessor.processInput(StreamInputProcessor.java:177) > at org.apache.flink.streaming.runtime.tasks. > OneInputStreamTask.run(OneInputStreamTask.java:66) > at org.apache.flink.streaming.runtime.tasks.StreamTask. > invoke(StreamTask.java:270) > at org.apache.flink.runtime.taskmanager.Task.run(Task. > java:609) > at java.lang.Thread.run(Thread.java:745) > Caused by: java.lang.NullPointerException > at org.apache.flink.api.java.typeutils.runtime. > TupleSerializer.copy(TupleSerializer.java:103) > at org.apache.flink.api.java.typeutils.runtime. > TupleSerializer.copy(TupleSerializer.java:30) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$ > CopyingChainingOutput.collect(OperatorChain.java:383) > ... 15 more >
