[jira] [Closed] (FLINK-21263) Job hangs under backpressure

["Piotr Nowojski (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-21263?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Piotr Nowojski closed FLINK-21263.
----------------------------------
    Resolution: Abandoned

> Job hangs under backpressure
> ----------------------------
>
>                 Key: FLINK-21263
>                 URL: https://issues.apache.org/jira/browse/FLINK-21263
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / Network
>    Affects Versions: 1.11.0
>            Reporter: Lu Niu
>            Priority: Minor
>              Labels: auto-deprioritized-major, stale-minor
>         Attachments: source_graph.svg, source_js1, source_js2, source_js3
>
>
> We have a flink job that runs fine for a few days but suddenly hangs and could never recover. Once we relanuch the job, the job runs fine. We detected the job has backpressure, but in all other cases, backpressure would only lead to slower consumption but what is wired here is the job made no progress at all. The symptoms looks similar with FLINK-20618
>  
> About the job:
> 1. Reads from Kafka and writes to Kafka
> 2. version 1.11
> 3. enabled unaligned checkpoint
>  
> symptoms:
>  # All source/sink throughput drop to 0
>  # All checkpoint fails immediately after triggering.
>  # backpressure shows "high" from source to two downstream operators. 
>  # Flamegraph shows all subtask threads are in waiting
>  # Source jstack shows the Source thread is BLOCKED, as belows.
> {code:java}
> Source: impression-reader -> impression-filter -> impression-data-conversion (1/60)
> Stack Trace is:
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x00000003a3e71330> (a java.util.concurrent.CompletableFuture$Signaller)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
> at java.util.concurrent.CompletableFuture$Signaller.block(CompletableFuture.java:1693)
> at java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3323)
> at java.util.concurrent.CompletableFuture.waitingGet(CompletableFuture.java:1729)
> at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestMemorySegmentBlocking(LocalBufferPool.java:293)
> at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBuilderBlocking(LocalBufferPool.java:266)
> at org.apache.flink.runtime.io.network.partition.ResultPartition.getBufferBuilder(ResultPartition.java:213)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.requestNewBufferBuilder(RecordWriter.java:294)
> at org.apache.flink.runtime.io.network.api.writer.ChannelSelectorRecordWriter.requestNewBufferBuilder(ChannelSelectorRecordWriter.java:103)
> at org.apache.flink.runtime.io.network.api.writer.ChannelSelectorRecordWriter.getBufferBuilder(ChannelSelectorRecordWriter.java:95)
> at org.apache.flink.runtime.io.network.api.writer.RecordWriter.copyFromSerializerToTargetChannel(RecordWriter.java:135)
> at org.apache.flink.runtime.io.network.api.writer.ChannelSelectorRecordWriter.broadcastEmit(ChannelSelectorRecordWriter.java:80)
> at org.apache.flink.streaming.runtime.io.RecordWriterOutput.emitWatermark(RecordWriterOutput.java:121)
> at org.apache.flink.streaming.api.operators.CountingOutput.emitWatermark(CountingOutput.java:41)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator.processWatermark(AbstractStreamOperator.java:570)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.emitWatermark(OperatorChain.java:638)
> at org.apache.flink.streaming.api.operators.CountingOutput.emitWatermark(CountingOutput.java:41)
> at org.apache.flink.streaming.api.operators.AbstractStreamOperator.processWatermark(AbstractStreamOperator.java:570)
> at org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.emitWatermark(OperatorChain.java:638)
> at org.apache.flink.streaming.api.operators.CountingOutput.emitWatermark(CountingOutput.java:41)
> at org.apache.flink.streaming.api.operators.StreamSourceContexts$ManualWatermarkContext.processAndEmitWatermark(StreamSourceContexts.java:315)
> at org.apache.flink.streaming.api.operators.StreamSourceContexts$WatermarkContext.emitWatermark(StreamSourceContexts.java:425)
> - locked <0x00000006a485dab0> (a java.lang.Object)
> at org.apache.flink.streaming.connectors.kafka.internals.SourceContextWatermarkOutputAdapter.emitWatermark(SourceContextWatermarkOutputAdapter.java:37)
> at org.apache.flink.api.common.eventtime.WatermarkOutputMultiplexer.updateCombinedWatermark(WatermarkOutputMultiplexer.java:167)
> at org.apache.flink.api.common.eventtime.WatermarkOutputMultiplexer.onPeriodicEmit(WatermarkOutputMultiplexer.java:136)
> at org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher$PeriodicWatermarkEmitter.onProcessingTime(AbstractFetcher.java:574)
> - locked <0x00000006a485dab0> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invokeProcessingTimeCallback(StreamTask.java:1220)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$null$16(StreamTask.java:1211)
> at org.apache.flink.streaming.runtime.tasks.StreamTask$$Lambda$590/1066788035.run(Unknown Source)
> at org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$SynchronizedStreamTaskActionExecutor.runThrowing(StreamTaskActionExecutor.java:92)
> - locked <0x00000006a485dab0> (a java.lang.Object)
> at org.apache.flink.streaming.runtime.tasks.mailbox.Mail.run(Mail.java:78)
> at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.processMail(MailboxProcessor.java:282)
> at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxStep(MailboxProcessor.java:190)
> at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:181)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:566)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:536)
> at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:721)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:546)
> at java.lang.Thread.run(Thread.java:748){code}
>  
>  



--
This message was sent by Atlassian Jira
(v8.3.4#803005)