[ https://issues.apache.org/jira/browse/FLINK-4852?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Aljoscha Krettek resolved FLINK-4852. ------------------------------------- Resolution: Fixed Fix Version/s: (was: 1.1.4) Fixed in https://github.com/apache/flink/commit/71d2e3ef1e42174822709aa8217088f2a489975a > ClassCastException when assigning Watermarks with > TimeCharacteristic.ProcessingTime > ----------------------------------------------------------------------------------- > > Key: FLINK-4852 > URL: https://issues.apache.org/jira/browse/FLINK-4852 > Project: Flink > Issue Type: Bug > Components: Streaming > Affects Versions: 1.2.0, 1.1.3 > Reporter: Maximilian Michels > Assignee: Aljoscha Krettek > Fix For: 1.2.0 > > > As per FLINK-3688 and FLINK-2936 this should already been resolved. Still, > when emitting Watermarks and using processing time, you get the following > ClassCastException: > {noformat} > Exception in thread "main" > org.apache.flink.runtime.client.JobExecutionException: Job execution failed. > at > org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$8.apply$mcV$sp(JobManager.scala:822) > at > org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$8.apply(JobManager.scala:768) > at > org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$8.apply(JobManager.scala:768) > at > scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) > at > scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) > at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:41) > at > akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:401) > at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) > at > scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.pollAndExecAll(ForkJoinPool.java:1253) > at > scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1346) > at > scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) > at > scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) > Caused by: java.lang.RuntimeException: Could not forward element to next > operator > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:376) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:358) > at > org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:346) > at > org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:329) > at > org.apache.flink.streaming.api.operators.StreamSource$NonTimestampContext.collect(StreamSource.java:161) > at > org.apache.flink.streaming.api.functions.source.StatefulSequenceSource.run(StatefulSequenceSource.java:68) > at > org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:80) > at > org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:53) > at > org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:56) > at > org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:266) > at org.apache.flink.runtime.taskmanager.Task.run(Task.java:585) > at java.lang.Thread.run(Thread.java:745) > Caused by: > org.apache.flink.streaming.runtime.tasks.ExceptionInChainedOperatorException: > Could not forward element to next operator > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.emitWatermark(OperatorChain.java:343) > at > org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.emitWatermark(AbstractStreamOperator.java:340) > at > org.apache.flink.streaming.runtime.operators.TimestampsAndPunctuatedWatermarksOperator.processElement(TimestampsAndPunctuatedWatermarksOperator.java:58) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:373) > ... 11 more > Caused by: java.lang.RuntimeException: > org.apache.flink.streaming.api.watermark.Watermark cannot be cast to > org.apache.flink.streaming.runtime.streamrecord.StreamRecord > at > org.apache.flink.streaming.runtime.io.RecordWriterOutput.emitWatermark(RecordWriterOutput.java:93) > at > org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.emitWatermark(AbstractStreamOperator.java:340) > at > org.apache.flink.streaming.api.operators.StreamMap.processWatermark(StreamMap.java:44) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.emitWatermark(OperatorChain.java:340) > ... 14 more > Caused by: java.lang.ClassCastException: > org.apache.flink.streaming.api.watermark.Watermark cannot be cast to > org.apache.flink.streaming.runtime.streamrecord.StreamRecord > at > org.apache.flink.streaming.runtime.streamrecord.StreamRecordSerializer.serialize(StreamRecordSerializer.java:42) > at > org.apache.flink.runtime.plugable.SerializationDelegate.write(SerializationDelegate.java:56) > at > org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer.addRecord(SpanningRecordSerializer.java:83) > at > org.apache.flink.runtime.io.network.api.writer.RecordWriter.broadcastEmit(RecordWriter.java:110) > at > org.apache.flink.streaming.runtime.io.StreamRecordWriter.broadcastEmit(StreamRecordWriter.java:95) > at > org.apache.flink.streaming.runtime.io.RecordWriterOutput.emitWatermark(RecordWriterOutput.java:90) > ... 17 more > {noformat} > Perhaps we should have an guard in the API to throw a more meaningful > exception. -- This message was sent by Atlassian JIRA (v6.3.4#6332)