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From ANDREA SPINA <74...@studenti.unimore.it>
Subject FlinkML ALS matrix factorization: java.io.IOException: Thread 'SortMerger Reading Thread' terminated due to an exception: null
Date Wed, 31 Aug 2016 12:40:13 GMT
Hi everyone.
I'm running the FlinkML ALS matrix factorization and I bumped into the
following exception:

org.apache.flink.client.program.ProgramInvocationException: The program
execution failed: Job execution failed.
at org.apache.flink.client.program.Client.runBlocking(Client.java:381)
at org.apache.flink.client.program.Client.runBlocking(Client.java:355)
at org.apache.flink.client.program.Client.runBlocking(Client.java:315)
at
org.apache.flink.client.program.ContextEnvironment.execute(ContextEnvironment.java:60)
at
org.apache.flink.api.scala.ExecutionEnvironment.execute(ExecutionEnvironment.scala:652)
at org.apache.flink.ml.common.FlinkMLTools$.persist(FlinkMLTools.scala:94)
at org.apache.flink.ml.recommendation.ALS$$anon$115.fit(ALS.scala:507)
at org.apache.flink.ml.recommendation.ALS$$anon$115.fit(ALS.scala:433)
at org.apache.flink.ml.pipeline.Estimator$class.fit(Estimator.scala:55)
at org.apache.flink.ml.recommendation.ALS.fit(ALS.scala:122)
at dima.tu.berlin.benchmark.flink.als.RUN$.main(RUN.scala:78)
at dima.tu.berlin.benchmark.flink.als.RUN.main(RUN.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:505)
at
org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:403)
at org.apache.flink.client.program.Client.runBlocking(Client.java:248)
at
org.apache.flink.client.CliFrontend.executeProgramBlocking(CliFrontend.java:866)
at org.apache.flink.client.CliFrontend.run(CliFrontend.java:333)
at
org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:1192)
at org.apache.flink.client.CliFrontend.main(CliFrontend.java:1243)
Caused by: org.apache.flink.runtime.client.JobExecutionException: Job
execution failed.
at
org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$7.apply$mcV$sp(JobManager.scala:717)
at
org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$7.apply(JobManager.scala:663)
at
org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$7.apply(JobManager.scala:663)
at
scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
at
scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:41)
at
akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:401)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at
scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.pollAndExecAll(ForkJoinPool.java:1253)
at
scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1346)
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at
scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: java.lang.RuntimeException: Initializing the input processing
failed: Error obtaining the sorted input: Thread 'SortMerger Reading
Thread' terminated due to an exception: null
at org.apache.flink.runtime.operators.BatchTask.invoke(BatchTask.java:325)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:559)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.RuntimeException: Error obtaining the sorted input:
Thread 'SortMerger Reading Thread' terminated due to an exception: null
at
org.apache.flink.runtime.operators.sort.UnilateralSortMerger.getIterator(UnilateralSortMerger.java:619)
at
org.apache.flink.runtime.operators.BatchTask.getInput(BatchTask.java:1079)
at
org.apache.flink.runtime.operators.BatchTask.initLocalStrategies(BatchTask.java:819)
at org.apache.flink.runtime.operators.BatchTask.invoke(BatchTask.java:321)
... 2 more
Caused by: java.io.IOException: Thread 'SortMerger Reading Thread'
terminated due to an exception: null
at
org.apache.flink.runtime.operators.sort.UnilateralSortMerger$ThreadBase.run(UnilateralSortMerger.java:800)
Caused by:
org.apache.flink.runtime.io.network.partition.ProducerFailedException
at
org.apache.flink.runtime.io.network.partition.consumer.LocalInputChannel.getNextLookAhead(LocalInputChannel.java:270)
at
org.apache.flink.runtime.io.network.partition.consumer.LocalInputChannel.onNotification(LocalInputChannel.java:238)
at
org.apache.flink.runtime.io.network.partition.PipelinedSubpartition.release(PipelinedSubpartition.java:158)
at
org.apache.flink.runtime.io.network.partition.ResultPartition.release(ResultPartition.java:320)
at
org.apache.flink.runtime.io.network.partition.ResultPartitionManager.releasePartitionsProducedBy(ResultPartitionManager.java:95)
at
org.apache.flink.runtime.io.network.NetworkEnvironment.unregisterTask(NetworkEnvironment.java:370)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:657)
at java.lang.Thread.run(Thread.java:745)

I'm running with* flink-1.0.3*. I really can't figure out the reason behind
that.

My code simply calls the library as follows:

val als = ALS()
  .setIterations(numIterations)
  .setNumFactors(rank)
  .setBlocks(degreeOfParallelism)
  .setSeed(42)
  .setTemporaryPath(tempPath)

als.fit(ratings, parameters)

val (users, items) = als.factorsOption match {
  case Some(_) => als.factorsOption.get
  case _ => throw new RuntimeException
}

users.writeAsText(outputPath, WriteMode.OVERWRITE)
items.writeAsText(outputPath, WriteMode.OVERWRITE)

env.execute("ALS matrix factorization")

where
- ratings as the input dataset contains (uid, iid, rate) rows about 8e6
users, 1e6 items and 700 rating per user average.
- numIterations 10
- rank 50
- degreeOfParallelism 240


*The error seems to be related to the final .persists() call.*at
org.apache.flink.ml.recommendation.ALS$$anon$115.fit(ALS.scala:507)

I'm running with a 15 nodes cluster - 16cpus per node - with the following
valuable properties:

jobmanager.heap.mb = 2048
taskmanager.memory.fraction = 0.5
taskmanager.heap.mb = 28672
taskmanager.network.bufferSizeInBytes = 32768
taskmanager.network.numberOfBuffers = 98304
akka.ask.timeout = 300s

Any help will be appreciated. Thank you.

-- 
*Andrea Spina*
N.Tessera: *74598*
MAT: *89369*
*Ingegneria Informatica* *[LM] *(D.M. 270)

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