Hi. What causes a buffer pool exception? How can I mitigate it? It is
causing us plenty of problems right now.
2021-01-26 04:14:33,041 INFO
org.apache.flink.streaming.api.functions.sink.filesystem.Buckets [] -
Subtask 1 received completion notification for checkpoint with id=4.
2021-01-26 04:14:33,140 WARN
org.apache.flink.streaming.connectors.kafka.internal.KafkaFetcher [] -
Committing offsets to Kafka takes longer than the checkpoint interval.
Skipping commit of previous offsets because newer complete checkpoint
offsets are available. This does not compromise Flink's checkpoint
integrity.
2021-01-26 04:14:33,143 INFO org.apache.kafka.clients.FetchSessionHandler
[] - [Consumer clientId=consumer-luminai-2,
groupId=luminai] Error sending fetch request (sessionId=936633685, epoch=1)
to node 2: {}.
org.apache.kafka.common.errors.DisconnectException: null
2021-01-26 04:14:33,146 INFO
org.apache.flink.streaming.api.functions.sink.filesystem.Buckets [] -
Subtask 1 checkpointing for checkpoint with id=5 (max part counter=1).
THEN FINALLY
ERROR
ai.beyond.luminai.sensor.pipeline.stream.functions.process.ForwardFillKeyedProcessFunction
[] - Error in timer.
java.lang.RuntimeException: Buffer pool is destroyed.
at
org.apache.flink.streaming.runtime.io.RecordWriterOutput.pushToRecordWriter(RecordWriterOutput.java:110)
~[flink-dist_2.12-1.11.0.jar:1.11.0]
at
org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:89)
~[flink-dist_2.12-1.11.0.jar:1.11.0]
at
org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:45)
~[flink-dist_2.12-1.11.0.jar:1.11.0]
at
org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:787)
~[flink-dist_2.12-1.11.0.jar:1.11.0]
at
org.apache.flink.streaming.runtime.tasks.OperatorChain$BroadcastingOutputCollector.collect(OperatorChain.java:740)
~[flink-dist_2.12-1.11.0.jar:1.11.0]
at
org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:52)
~[flink-dist_2.12-1.11.0.jar:1.11.0]
at
org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:30)
~[flink-dist_2.12-1.11.0.jar:1.11.0]
at
org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:53)
~[flink-dist_2.12-1.11.0.jar:1.11.0]
at
mypackage.MyOperator.collect(MyOperator.java:452) ~[develop-17e9fd0e.jar:?]
at mypackage.MyOperator.onTimer(MyOperator.java:277)
~[develop-17e9fd0e.jar:?]
at
org.apache.flink.streaming.api.operators.KeyedProcessOperator.invokeUserFunction(KeyedProcessOperator.java:94)
~[flink-dist_2.12-1.11.0.jar:1.11.0]
at
org.apache.flink.streaming.api.operators.KeyedProcessOperator.onProcessingTime(KeyedProcessOperator.java:78)
~[flink-dist_2.12-1.11.0.jar:1.11.0]
at
org.apache.flink.streaming.api.operators.InternalTimerServiceImpl.onProcessingTime(InternalTimerServiceImpl.java:260)
~[flink-dist_2.12-1.11.0.jar:1.11.0]
at
org.apache.flink.streaming.runtime.tasks.StreamTask.invokeProcessingTimeCallback(StreamTask.java:1181)
~[flink-dist_2.12-1.11.0.jar:1.11.0]
at
org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$null$13(StreamTask.java:1172)
~[flink-dist_2.12-1.11.0.jar:1.11.0]
at
org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$1.runThrowing(StreamTaskActionExecutor.java:47)
[flink-dist_2.12-1.11.0.jar:1.11.0]
at org.apache.flink.streaming.runtime.tasks.mailbox.Mail.run(Mail.java:78)
[flink-dist_2.12-1.11.0.jar:1.11.0]
at
org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.processMail(MailboxProcessor.java:282)
[flink-dist_2.12-1.11.0.jar:1.11.0]
at
org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxStep(MailboxProcessor.java:190)
[flink-dist_2.12-1.11.0.jar:1.11.0]
at
org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:181)
[flink-dist_2.12-1.11.0.jar:1.11.0]
at
org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:558)
[flink-dist_2.12-1.11.0.jar:1.11.0]
at
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:530)
[flink-dist_2.12-1.11.0.jar:1.11.0]
at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:721)
[develop-17e9fd0e.jar:?]
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:546)
[develop-17e9fd0e.jar:?]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_252]
Caused by: java.lang.IllegalStateException: Buffer pool is destroyed.
at
org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestMemorySegmentFromGlobal(LocalBufferPool.java:339)
~[develop-17e9fd0e.jar:?]
at
org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestMemorySegment(LocalBufferPool.java:309)
~[develop-17e9fd0e.jar:?]
at
org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestMemorySegmentBlocking(LocalBufferPool.java:290)
~[develop-17e9fd0e.jar:?]
at
org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBuilderBlocking(LocalBufferPool.java:266)
~[develop-17e9fd0e.jar:?]
at
org.apache.flink.runtime.io.network.partition.ResultPartition.getBufferBuilder(ResultPartition.java:213)
~[develop-17e9fd0e.jar:?]
at
org.apache.flink.runtime.io.network.api.writer.RecordWriter.requestNewBufferBuilder(RecordWriter.java:294)
~[develop-17e9fd0e.jar:?]
at
org.apache.flink.runtime.io.network.api.writer.ChannelSelectorRecordWriter.requestNewBufferBuilder(ChannelSelectorRecordWriter.java:103)
~[develop-17e9fd0e.jar:?]
at
org.apache.flink.runtime.io.network.api.writer.RecordWriter.copyFromSerializerToTargetChannel(RecordWriter.java:149)
~[develop-17e9fd0e.jar:?]
at
org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:120)
~[develop-17e9fd0e.jar:?]
at
org.apache.flink.runtime.io.network.api.writer.ChannelSelectorRecordWriter.emit(ChannelSelectorRecordWriter.java:60)
~[develop-17e9fd0e.jar:?]
at
org.apache.flink.streaming.runtime.io.RecordWriterOutput.pushToRecordWriter(RecordWriterOutput.java:107)
~[flink-dist_2.12-1.11.0.jar:1.11.0]
