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https://issues.apache.org/jira/browse/FLINK-18832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17171516#comment-17171516
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Till Rohrmann commented on FLINK-18832:
---------------------------------------
cc [~pnowojski] and [~zjwang]
> BoundedBlockingSubpartition does not work with StreamTask
> ---------------------------------------------------------
>
> Key: FLINK-18832
> URL: https://issues.apache.org/jira/browse/FLINK-18832
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Network, Runtime / Task
> Affects Versions: 1.10.1, 1.12.0, 1.11.1
> Reporter: Till Rohrmann
> Priority: Major
>
> The {{BoundedBlockingSubpartition}} does not work with a {{StreamTask}}
> because the {{StreamTask}} instantiates an {{OutputFlusher}} which
> concurrently accesses the {{BoundedBlockingSubpartition}}. This concurrency
> can lead to a double closing of the underlying {{BufferConsumer}} which
> manifests in this stack trace:
> {code}
> [9:15 PM] Caused by:
> org.apache.flink.shaded.netty4.io.netty.util.IllegalReferenceCountException:
> refCnt: 0, increment: 1
> at
> org.apache.flink.shaded.netty4.io.netty.util.internal.ReferenceCountUpdater.retain0(ReferenceCountUpdater.java:123)
> at
> org.apache.flink.shaded.netty4.io.netty.util.internal.ReferenceCountUpdater.retain(ReferenceCountUpdater.java:110)
> at
> org.apache.flink.shaded.netty4.io.netty.buffer.AbstractReferenceCountedByteBuf.retain(AbstractReferenceCountedByteBuf.java:80)
> at
> org.apache.flink.runtime.io.network.buffer.NetworkBuffer.retainBuffer(NetworkBuffer.java:174)
> at
> org.apache.flink.runtime.io.network.buffer.NetworkBuffer.retainBuffer(NetworkBuffer.java:47)
> at
> org.apache.flink.runtime.io.network.buffer.ReadOnlySlicedNetworkBuffer.retainBuffer(ReadOnlySlicedNetworkBuffer.java:127)
> at
> org.apache.flink.runtime.io.network.buffer.ReadOnlySlicedNetworkBuffer.retainBuffer(ReadOnlySlicedNetworkBuffer.java:41)
> at
> org.apache.flink.runtime.io.network.buffer.BufferConsumer.build(BufferConsumer.java:108)
> at
> org.apache.flink.runtime.io.network.partition.BoundedBlockingSubpartition.writeAndCloseBufferConsumer(BoundedBlockingSubpartition.java:156)
> at
> org.apache.flink.runtime.io.network.partition.BoundedBlockingSubpartition.flushCurrentBuffer(BoundedBlockingSubpartition.java:144)
> at
> org.apache.flink.runtime.io.network.partition.BoundedBlockingSubpartition.flush(BoundedBlockingSubpartition.java:135)
> at
> org.apache.flink.runtime.io.network.partition.ResultPartition.flushAll(ResultPartition.java:245)
> at
> org.apache.flink.runtime.io.network.api.writer.RecordWriter.flushAll(RecordWriter.java:183)
> at
> org.apache.flink.streaming.runtime.io.RecordWriterOutput.flush(RecordWriterOutput.java:156)
> at
> org.apache.flink.streaming.runtime.tasks.OperatorChain.flushOutputs(OperatorChain.java:344)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.afterInvoke(StreamTask.java:602)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:544)
> 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}
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