[FLINK-9388] Inconsistency in job shutdown produces confusing log message

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Cannot Reproduce
• Affects Version/s: 1.5.0, 1.6.0
• Component/s: Runtime / Task
• Labels: stale-minor
• Assignee: Unassigned
• Reporter: Stefan Richter
• Created: 17/May/18 08:42
• Updated: 19/Apr/21 06:59
• Resolved: 19/Apr/21 06:59

Description

I found some logged exceptions in a user log that occurred during shutdown in the context of latency markers. Those exceptions are most certainly not a real problem, but can be confusing to users, so maybe we can get rid of them.

org.apache.flink.streaming.runtime.tasks.ExceptionInChainedOperatorException: Could not forward element to next operator
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.emitLatencyMarker(OperatorChain.java:527)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.emitLatencyMarker(AbstractStreamOperator.java:676)
	at org.apache.flink.streaming.api.operators.StreamSource$LatencyMarksEmitter$1.onProcessingTime(StreamSource.java:151)
	at org.apache.flink.streaming.runtime.tasks.SystemProcessingTimeService$RepeatedTriggerTask.run(SystemProcessingTimeService.java:294)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.flink.streaming.runtime.tasks.ExceptionInChainedOperatorException: Could not forward element to next operator
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.emitLatencyMarker(OperatorChain.java:527)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.emitLatencyMarker(AbstractStreamOperator.java:676)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.reportOrForwardLatencyMarker(AbstractStreamOperator.java:652)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.processLatencyMarker(AbstractStreamOperator.java:635)
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.emitLatencyMarker(OperatorChain.java:524)
	... 10 more
Caused by: org.apache.flink.streaming.runtime.tasks.ExceptionInChainedOperatorException: Could not forward element to next operator
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.emitLatencyMarker(OperatorChain.java:527)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.emitLatencyMarker(AbstractStreamOperator.java:676)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.reportOrForwardLatencyMarker(AbstractStreamOperator.java:652)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.processLatencyMarker(AbstractStreamOperator.java:635)
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.emitLatencyMarker(OperatorChain.java:524)
	... 14 more
Caused by: org.apache.flink.streaming.runtime.tasks.ExceptionInChainedOperatorException: Could not forward element to next operator
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.emitLatencyMarker(OperatorChain.java:527)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.emitLatencyMarker(AbstractStreamOperator.java:676)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.reportOrForwardLatencyMarker(AbstractStreamOperator.java:652)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.processLatencyMarker(AbstractStreamOperator.java:635)
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.emitLatencyMarker(OperatorChain.java:524)
	... 18 more
Caused by: java.lang.RuntimeException: Buffer pool is destroyed.
	at org.apache.flink.streaming.runtime.io.RecordWriterOutput.emitLatencyMarker(RecordWriterOutput.java:147)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.emitLatencyMarker(AbstractStreamOperator.java:676)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.reportOrForwardLatencyMarker(AbstractStreamOperator.java:652)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.processLatencyMarker(AbstractStreamOperator.java:635)
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.emitLatencyMarker(OperatorChain.java:524)
	... 22 more
Caused by: java.lang.IllegalStateException: Buffer pool is destroyed.
	at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBuilder(LocalBufferPool.java:211)
	at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBuilderBlocking(LocalBufferPool.java:199)
	at org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:134)
	at org.apache.flink.runtime.io.network.api.writer.RecordWriter.randomEmit(RecordWriter.java:108)
	at org.apache.flink.streaming.runtime.io.StreamRecordWriter.randomEmit(StreamRecordWriter.java:102)
	at org.apache.