[jira] [Created] (FLINK-20220) DataSet.collect() uses TaskExecutionState for transferring user-payload

[Shang Yuanchun (Jira)]

Robert Metzger created FLINK-20220:
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             Summary: DataSet.collect() uses TaskExecutionState for transferring user-payload
                 Key: FLINK-20220
                 URL: https://issues.apache.org/jira/browse/FLINK-20220
             Project: Flink
          Issue Type: Bug
          Components: Runtime / Coordination
            Reporter: Robert Metzger


Running the {{PageRank}} example in Flink, I accidentally tried collect()-ing 125MB of data using accumulators to my client.

From a user's perspective, my job failed with this exception:
{code}
2020-11-18 12:56:06,897 INFO  org.apache.flink.runtime.executiongraph.ExecutionGraph       [] - DataSink (collect()) (3/4) (a1389a18cccabe10339099064032d6b8) switched from RUNNING to FAILED on org.apache.flink.runtime.jobmaster.slotpool.SingleLogicalSlot@6af1e09b.
org.apache.flink.util.FlinkException: Execution a1389a18cccabe10339099064032d6b8 is unexpectedly no longer running on task executor 192.168.1.25:56111-928d60.
        at org.apache.flink.runtime.jobmaster.JobMaster$1.onMissingDeploymentsOf(JobMaster.java:248) ~[flink-dist_2.11-1.12.0.jar:1.12.0]
        at org.apache.flink.runtime.jobmaster.DefaultExecutionDeploymentReconciler.reconcileExecutionDeployments(DefaultExecutionDeploymentReconciler.java:55) ~[flink-dist_2.11-1.12.0.jar:1.12.0]
        at org.apache.flink.runtime.jobmaster.JobMaster$TaskManagerHeartbeatListener.reportPayload(JobMaster.java:1248) ~[flink-dist_2.11-1.12.0.jar:1.12.0]
        at org.apache.flink.runtime.jobmaster.JobMaster$TaskManagerHeartbeatListener.reportPayload(JobMaster.java:1235) ~[flink-dist_2.11-1.12.0.jar:1.12.0]
        at org.apache.flink.runtime.heartbeat.HeartbeatManagerImpl.receiveHeartbeat(HeartbeatManagerImpl.java:199) ~[flink-dist_2.11-1.12.0.jar:1.12.0]
        at org.apache.flink.runtime.jobmaster.JobMaster.heartbeatFromTaskManager(JobMaster.java:686) ~[flink-dist_2.11-1.12.0.jar:1.12.0]
        at sun.reflect.GeneratedMethodAccessor92.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_222]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_222]
{code}

The root cause for this problem is the following exception on the TaskManager:
{code}
2020-11-18 12:56:05,972 ERROR org.apache.flink.runtime.rpc.akka.AkkaRpcActor               [] - Caught exception while executing runnable in main thread.
java.lang.reflect.UndeclaredThrowableException: null
        at com.sun.proxy.$Proxy25.updateTaskExecutionState(Unknown Source) ~[?:?]
        at org.apache.flink.runtime.taskexecutor.TaskExecutor.updateTaskExecutionState(TaskExecutor.java:1563) ~[flink-dist_2.11-1.12.0.jar:1.12.0]
        at org.apache.flink.runtime.taskexecutor.TaskExecutor.unregisterTaskAndNotifyFinalState(TaskExecutor.java:1593) ~[flink-dist_2.11-1.12.0.jar:1.12.0]
        at org.apache.flink.runtime.taskexecutor.TaskExecutor.access$2400(TaskExecutor.java:174) ~[flink-dist_2.11-1.12.0.jar:1.12.0]
        at org.apache.flink.runtime.taskexecutor.TaskExecutor$TaskManagerActionsImpl.lambda$updateTaskExecutionState$1(TaskExecutor.java:1925) ~[flink-dist_2.11-1.12.0.jar:1.12.0]
        at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRunAsync(AkkaRpcActor.java:404) ~[flink-dist_2.11-1.12.0.jar:1.12.0]
        at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcMessage(AkkaRpcActor.java:197) ~[flink-dist_2.11-1.12.0.jar:1.12.0]
        at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleMessage(AkkaRpcActor.java:154) ~[flink-dist_2.11-1.12.0.jar:1.12.0]
        at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:26) [flink-dist_2.11-1.12.0.jar:1.12.0]
        at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:21) [flink-dist_2.11-1.12.0.jar:1.12.0]
        at scala.PartialFunction$class.applyOrElse(PartialFunction.scala:123) [flink-dist_2.11-1.12.0.jar:1.12.0]
        at akka.japi.pf.UnitCaseStatement.applyOrElse(CaseStatements.scala:21) [flink-dist_2.11-1.12.0.jar:1.12.0]
        at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:170) [flink-dist_2.11-1.12.0.jar:1.12.0]
        at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171) [flink-dist_2.11-1.12.0.jar:1.12.0]
        at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171) [flink-dist_2.11-1.12.0.jar:1.12.0]
        at akka.actor.Actor$class.aroundReceive(Actor.scala:517) [flink-dist_2.11-1.12.0.jar:1.12.0]
        at akka.actor.AbstractActor.aroundReceive(AbstractActor.scala:225) [flink-dist_2.11-1.12.0.jar:1.12.0]
        at akka.actor.ActorCell.receiveMessage(ActorCell.scala:592) [flink-dist_2.11-1.12.0.jar:1.12.0]
        at akka.actor.ActorCell.invoke(ActorCell.scala:561) [flink-dist_2.11-1.12.0.jar:1.12.0]
        at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:258) [flink-dist_2.11-1.12.0.jar:1.12.0]
        at akka.dispatch.Mailbox.run(Mailbox.scala:225) [flink-dist_2.11-1.12.0.jar:1.12.0]
        at akka.dispatch.Mailbox.exec(Mailbox.scala:235) [flink-dist_2.11-1.12.0.jar:1.12.0]
        at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) [flink-dist_2.11-1.12.0.jar:1.12.0]
        at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) [flink-dist_2.11-1.12.0.jar:1.12.0]
        at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) [flink-dist_2.11-1.12.0.jar:1.12.0]
        at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) [flink-dist_2.11-1.12.0.jar:1.12.0]
Caused by: java.io.IOException: The rpc invocation size 125349547 exceeds the maximum akka framesize.
        at org.apache.flink.runtime.rpc.akka.AkkaInvocationHandler.createRpcInvocationMessage(AkkaInvocationHandler.java:276) ~[flink-dist_2.11-1.12.0.jar:1.12.0]
        at org.apache.flink.runtime.rpc.akka.AkkaInvocationHandler.invokeRpc(AkkaInvocationHandler.java:205) ~[flink-dist_2.11-1.12.0.jar:1.12.0]
        at org.apache.flink.runtime.rpc.akka.AkkaInvocationHandler.invoke(AkkaInvocationHandler.java:134) ~[flink-dist_2.11-1.12.0.jar:1.12.0]
        at org.apache.flink.runtime.rpc.akka.FencedAkkaInvocationHandler.invoke(FencedAkkaInvocationHandler.java:79) ~[flink-dist_2.11-1.12.0.jar:1.12.0]
        ... 26 more
{code}

It seems that the purely coordination-related {{updateTaskExecutionState}} call doesn't go through because some user data is piggybacking this call.

I see the following options solving this:
a) Don't use the coordination RPC system for transferring user payload
b) use separate RPC calls for transferring user payload
c) limit the size of accumulators that can be attached to the {{TaskExecutionState}}

 



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