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From Stephan Ewen <se...@apache.org>
Subject Re: Random Selection
Date Mon, 22 Jun 2015 14:45:07 GMT
Actually, the closure cleaner is supposed to take care of the "anonymous
inner class" situation.

Did you deactivate that one, by any chance?

On Mon, Jun 15, 2015 at 5:31 PM, Maximilian Alber <
alber.maximilian@gmail.com> wrote:

> Hi everyone!
> Thanks! It seems the variable that makes the problems. Making an inner
> class solved the issue.
> Cheers,
> Max
>
> On Mon, Jun 15, 2015 at 2:58 PM, Kruse, Sebastian <Sebastian.Kruse@hpi.de>
> wrote:
>
>>  Hi everyone,
>>
>>
>>
>> I did not reenact it, but I think the problem here is rather the
>> anonymous class. It looks like it is created within a class, not an object.
>> Thus it is not “static” in Java terms, which means that also its
>> surrounding class (the job class) will be serialized. And in this job
>> class, there seems to be a DataSet field, that cannot be serialized.
>>
>>
>>
>> If that really is the problem, you should either define your anonymous
>> class within the companion object of your job class or resort directly to a
>> function (and make sure that you do not pass a variable from your job class
>> into the scope of the function).
>>
>>
>>
>> Cheers,
>>
>> Sebastian
>>
>>
>>
>> *From:* Till Rohrmann [mailto:trohrmann@apache.org]
>> *Sent:* Montag, 15. Juni 2015 14:16
>> *To:* user@flink.apache.org
>> *Subject:* Re: Random Selection
>>
>>
>>
>> Hi Max,
>>
>> the problem is that you’re trying to serialize the companion object of
>> scala.util.Random. Try to create an instance of the scala.util.Random
>> class and use this instance within your RIchFilterFunction to generate
>> the random numbers.
>>
>> Cheers,
>> Till
>>
>> On Mon, Jun 15, 2015 at 1:56 PM Maximilian Alber
>> alber.maximilian@gmail.com <http://mailto:alber.maximilian@gmail.com>
>> wrote:
>>
>>    Hi Flinksters,
>>
>> I would like to randomly choose a element of my data set. But somehow I
>> cannot use scala.util inside my filter functions:
>>
>>       val sample_x = X filter(new RichFilterFunction[Vector](){
>>         var i: Int = -1
>>
>>         override def open(config: Configuration) = {
>>           i = scala.util.Random.nextInt(N)
>>         }
>>         def filter(a: Vector) = a.id == i
>>       })
>>       val sample_y = Y filter(new RichFilterFunction[Vector](){
>>         def filter(a: Vector) = a.id == scala.util.Random.nextInt(N)
>>       })
>>
>> That's the error I get:
>>
>> Exception in thread "main" org.apache.flink.optimizer.CompilerException:
>> An error occurred while translating the optimized plan to a nephele
>> JobGraph: Error translating node 'Filter "Filter at
>> Test$anonfun$10.apply(test.scala:276)" : FLAT_MAP [[ GlobalProperties
>> [partitioning=RANDOM_PARTITIONED] ]] [[ LocalProperties [ordering=null,
>> grouped=null, unique=null] ]]': Could not write the user code wrapper class
>> org.apache.flink.api.common.operators.util.UserCodeObjectWrapper :
>> java.io.NotSerializableException: org.apache.flink.api.scala.DataSet
>>     at
>> org.apache.flink.optimizer.plantranslate.JobGraphGenerator.postVisit(JobGraphGenerator.java:578)
>>     at
>> org.apache.flink.optimizer.plantranslate.JobGraphGenerator.postVisit(JobGraphGenerator.java:103)
>>     at
>> org.apache.flink.optimizer.plan.SingleInputPlanNode.accept(SingleInputPlanNode.java:205)
>>     at
>> org.apache.flink.optimizer.plan.SingleInputPlanNode.accept(SingleInputPlanNode.java:199)
>>     at
>> org.apache.flink.optimizer.plan.SingleInputPlanNode.accept(SingleInputPlanNode.java:199)
>>     at
>> org.apache.flink.optimizer.plan.OptimizedPlan.accept(OptimizedPlan.java:127)
>>     at
>> org.apache.flink.optimizer.plantranslate.JobGraphGenerator.compileJobGraph(JobGraphGenerator.java:170)
>>     at
>> org.apache.flink.client.LocalExecutor.executePlan(LocalExecutor.java:176)
>>     at
>> org.apache.flink.api.java.LocalEnvironment.execute(LocalEnvironment.java:54)
>>     at
>> org.apache.flink.api.java.ExecutionEnvironment.execute(ExecutionEnvironment.java:789)
>>     at
>> org.apache.flink.api.scala.ExecutionEnvironment.execute(ExecutionEnvironment.scala:576)
>>     at org.apache.flink.api.scala.DataSet.collect(DataSet.scala:544)
>>     at Test$delayedInit$body.apply(test.scala:304)
>>     at scala.Function0$class.apply$mcV$sp(Function0.scala:40)
>>     at
>> scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)
>>     at scala.App$anonfun$main$1.apply(App.scala:71)
>>     at scala.App$anonfun$main$1.apply(App.scala:71)
>>     at scala.collection.immutable.List.foreach(List.scala:318)
>>     at
>> scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:32)
>>     at scala.App$class.main(App.scala:71)
>>     at Test$.main(test.scala:45)
>>     at Test.main(test.scala)
>> Caused by: org.apache.flink.optimizer.CompilerException: Error
>> translating node 'Filter "Filter at Test$anonfun$10.apply(test.scala:276)"
>> : FLAT_MAP [[ GlobalProperties [partitioning=RANDOM_PARTITIONED] ]] [[
>> LocalProperties [ordering=null, grouped=null, unique=null] ]]': Could not
>> write the user code wrapper class
>> org.apache.flink.api.common.operators.util.UserCodeObjectWrapper :
>> java.io.NotSerializableException: org.apache.flink.api.scala.DataSet
>>     at
>> org.apache.flink.optimizer.plantranslate.JobGraphGenerator.preVisit(JobGraphGenerator.java:360)
>>     at
>> org.apache.flink.optimizer.plantranslate.JobGraphGenerator.preVisit(JobGraphGenerator.java:103)
>>     at
>> org.apache.flink.optimizer.plan.SingleInputPlanNode.accept(SingleInputPlanNode.java:198)
>>     at
>> org.apache.flink.optimizer.plan.SingleInputPlanNode.accept(SingleInputPlanNode.java:202)
>>     at
>> org.apache.flink.optimizer.plan.BulkIterationPlanNode.acceptForStepFunction(BulkIterationPlanNode.java:137)
>>     at
>> org.apache.flink.optimizer.plantranslate.JobGraphGenerator.postVisit(JobGraphGenerator.java:427)
>>     ... 21 more
>> Caused by:
>> org.apache.flink.runtime.operators.util.CorruptConfigurationException:
>> Could not write the user code wrapper class
>> org.apache.flink.api.common.operators.util.UserCodeObjectWrapper :
>> java.io.NotSerializableException: org.apache.flink.api.scala.DataSet
>>     at
>> org.apache.flink.runtime.operators.util.TaskConfig.setStubWrapper(TaskConfig.java:275)
>>     at
>> org.apache.flink.optimizer.plantranslate.JobGraphGenerator.createSingleInputVertex(JobGraphGenerator.java:803)
>>     at
>> org.apache.flink.optimizer.plantranslate.JobGraphGenerator.preVisit(JobGraphGenerator.java:305)
>>     ... 26 more
>> Caused by: java.io.NotSerializableException:
>> org.apache.flink.api.scala.DataSet
>>     at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1183)
>>     at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1547)
>>     at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1508)
>>     at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431)
>>     aio.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177)
>>     at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1547)
>>     at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1508)
>>     at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431)
>>     at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177)
>>     at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1547)
>>     at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1508)
>>     at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431)
>>     at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177)
>>     at
>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1547)
>>     at
>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1508)
>>     at
>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431)
>>     at
>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177)
>>     at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:347)
>>     at
>> org.apache.flink.util.InstantiationUtil.serializeObject(InstantiationUtil.java:314)
>>     at
>> org.apache.flink.util.InstantiationUtil.writeObjectToConfig(InstantiationUtil.java:268)
>>     at
>> org.apache.flink.runtime.operators.util.TaskConfig.setStubWrapper(TaskConfig.java:273)
>>
>>  Did I miss something or it is simply not possible?
>>
>> Thanks!
>>
>> Cheers,
>>
>> Max
>>
>>  ​
>>
>
>

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