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https://issues.apache.org/jira/browse/FLINK-18821?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhijiang closed FLINK-18821.
----------------------------
Resolution: Fixed
Merged in release-1.11: ded539e85444f9c8d34f88da31784775ed281aba
Merged in master: 33bdc978a059c50ec55b8f24d40039d13a6b78e7
> Netty client retry mechanism may cause
> PartitionRequestClientFactory#createPartitionRequestClient to wait infinitely
> --------------------------------------------------------------------------------------------------------------------
>
> Key: FLINK-18821
> URL: https://issues.apache.org/jira/browse/FLINK-18821
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Network
> Affects Versions: 1.10.1, 1.12.0, 1.11.1
> Reporter: Caizhi Weng
> Assignee: Roman Khachatryan
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.12.0, 1.11.2
>
>
> When running TPCDS 10T benchmark on Flink I found some of the task slots
> stuck. After some investigation there seems to be a bug in
> {{PartitionRequestClientFactory}}.
> When a task tries to require a partition of data from its upstream task but
> fails, {{PartitionRequestClientFactory#connect}} will throw
> {{RemoteTransportException}} and
> {{PartitionRequestClientFactory#connectWithRetries}} will throw
> {{CompletionException}}. However this exception is not caught by
> {{PartitionRequestClientFactory#connect}} and it will eventually fail the
> task.
> But {{PartitionRequestClientFactory}} lives in a task manager not in a task.
> In {{PartitionRequestClientFactory}} a {{ConcurrentHashMap}} named
> {{clients}} is maintained for reusing {{NettyPartitionRequestClient}}. When
> the above exception happens, {{clients}} is not cleaned up; When the next
> call to {{PartitionRequestClientFactory#connect}} with the same connection id
> comes, it will use the invalid {{CompletableFuture}} in {{clients}} and this
> future will never complete, causing the task to stuck forever.
> Exception stack:
> {code}
> 2020-08-05 03:37:07,539 ERROR
> org.apache.flink.runtime.io.network.netty.PartitionRequestClientFactory [] -
> Failed 1 times to connect to <host-name>/<ip>:<port>
> org.apache.flink.runtime.io.network.netty.exception.RemoteTransportException:
> Connecting to remote task manager '<host-name>/<ip>:<port>' has failed. This
> might indicate that the remote task manager has been lost.
> at
> org.apache.flink.runtime.io.network.netty.PartitionRequestClientFactory.connect(PartitionRequestClientFactory.java:120)
> ~[flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at
> org.apache.flink.runtime.io.network.netty.PartitionRequestClientFactory.connectWithRetries(PartitionRequestClientFactory.java:99)
> ~[flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at
> org.apache.flink.runtime.io.network.netty.PartitionRequestClientFactory.createPartitionRequestClient(PartitionRequestClientFactory.java:76)
> ~[flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at
> org.apache.flink.runtime.io.network.netty.NettyConnectionManager.createPartitionRequestClient(NettyConnectionManager.java:67)
> ~[flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at
> org.apache.flink.runtime.io.network.partition.consumer.RemoteInputChannel.requestSubpartition(RemoteInputChannel.java:146)
> ~[flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at
> org.apache.flink.runtime.io.network.partition.consumer.SingleInputGate.internalRequestPartitions(SingleInputGate.java:329)
> ~[flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at
> org.apache.flink.runtime.io.network.partition.consumer.SingleInputGate.requestPartitions(SingleInputGate.java:301)
> ~[flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at
> org.apache.flink.runtime.taskmanager.InputGateWithMetrics.requestPartitions(InputGateWithMetrics.java:95)
> ~[flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.requestPartitions(StreamTask.java:514)
> ~[flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.readRecoveredChannelState(StreamTask.java:484)
> ~[flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$beforeInvoke$0(StreamTask.java:475)
> ~[flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at
> org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$1.runThrowing(StreamTaskActionExecutor.java:47)
> [flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.beforeInvoke(StreamTask.java:469)
> [flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:522)
> [flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:721)
> [flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:546)
> [flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at java.lang.Thread.run(Thread.java:834) [?:1.8.0_102]
> Caused by: java.lang.NullPointerException
> at
> org.apache.flink.util.Preconditions.checkNotNull(Preconditions.java:58)
> ~[flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at
> org.apache.flink.runtime.io.network.netty.NettyPartitionRequestClient.<init>(NettyPartitionRequestClient.java:73)
> ~[flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at
> org.apache.flink.runtime.io.network.netty.PartitionRequestClientFactory.connect(PartitionRequestClientFactory.java:114)
> ~[flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> ... 16 more
> {code}
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