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From Ufuk Celebi <...@apache.org>
Subject Re: NotSerializableException
Date Wed, 15 Jun 2016 15:31:34 GMT
Here's the issue https://issues.apache.org/jira/browse/FLINK-4078

On Mon, Jun 13, 2016 at 12:27 PM, Aljoscha Krettek <aljoscha@apache.org> wrote:
> Nope, I think there is neither a fix nor an open issue for this right now.
>
> On Mon, 13 Jun 2016 at 11:31 Maximilian Michels <mxm@apache.org> wrote:
>>
>> Is there an issue or a fix for proper use of the ClojureCleaner in
>> CoGroup.where()?
>>
>> On Fri, Jun 10, 2016 at 8:07 AM, Aljoscha Krettek <aljoscha@apache.org>
>> wrote:
>> > Hi,
>> > yes, I was talking about a Flink bug. I forgot to mention the
>> > work-around
>> > that Stephan mentioned.
>> >
>> > On Thu, 9 Jun 2016 at 20:38 Stephan Ewen <sewen@apache.org> wrote:
>> >>
>> >> You can also make the KeySelector a static inner class. That should
>> >> work
>> >> as well.
>> >>
>> >> On Thu, Jun 9, 2016 at 7:00 PM, Tarandeep Singh <tarandeep@gmail.com>
>> >> wrote:
>> >>>
>> >>> Thank you Aljoscha and Fabian for your replies.
>> >>>
>> >>> @Aljoscha: when you said "cleaner is not used in CoGroup.where(). I'm
>> >>> afraid this is a bug", I am assuming you are referring to Flink engine
>> >>> itself.
>> >>>
>> >>> @Fabian: thanks for the optimization tip.
>> >>>
>> >>> This is how I have got it working (with a hack): In my dataset, the
>> >>> join
>> >>> field/key can be null otherwise .where(fieldName) works and I don't
>> >>> get
>> >>> not-serializable exception. So I applied a MapFunction to DataSet and
>> >>> put a
>> >>> dummy value in the join field/key where it was null. Then In the join
>> >>> function, I change it back to null.
>> >>>
>> >>> Best,
>> >>> Tarandeep
>> >>>
>> >>> On Thu, Jun 9, 2016 at 7:06 AM, Aljoscha Krettek <aljoscha@apache.org>
>> >>> wrote:
>> >>>>
>> >>>> Hi,
>> >>>> the problem is that the KeySelector is an anonymous inner class
and
>> >>>> as
>> >>>> such as a reference to the outer RecordFilterer object. Normally,
>> >>>> this would
>> >>>> be rectified by the closure cleaner but the cleaner is not used
in
>> >>>> CoGroup.where(). I'm afraid this is a bug.
>> >>>>
>> >>>> Best,
>> >>>> Aljoscha
>> >>>>
>> >>>>
>> >>>> On Thu, 9 Jun 2016 at 14:06 Fabian Hueske <fhueske@gmail.com>
wrote:
>> >>>>>
>> >>>>> Hi Tarandeep,
>> >>>>>
>> >>>>> the exception suggests that Flink tries to serialize RecordsFilterer
>> >>>>> as
>> >>>>> a user function (this happens via Java Serialization).
>> >>>>> I said suggests because the code that uses RecordsFilterer is
not
>> >>>>> included.
>> >>>>>
>> >>>>> To me it looks like RecordsFilterer should not be used as a
user
>> >>>>> function. It is a helper class to construct a DataSet program,
so it
>> >>>>> should
>> >>>>> not be shipped for execution.
>> >>>>> You would use such a class as follows:
>> >>>>>
>> >>>>> DataSet<T> records = ...
>> >>>>> DataSet<String> filterIDs = ...
>> >>>>>
>> >>>>> RecordsFilterer rf = new RecordsFilterer();
>> >>>>> DataSet<Tuple2<Boolean, T>> result = rf.addFilterFlag(records,
>> >>>>> filterIDs, "myField");
>> >>>>>
>> >>>>> Regarding the join code, I would suggest an optimization.
>> >>>>> Instead of using CoGroup, I would use distinct and an OuterJoin
like
>> >>>>> this:
>> >>>>>
>> >>>>> DataSet<String> distIds = filtereredIds.distinct();
>> >>>>> DataSet<Tuple2<Boolean, T> result = records
>> >>>>>   .leftOuterJoin(distIds)
>> >>>>>   .where(KEYSELECTOR)
>> >>>>>   .equalTo("*") // use full string as key
>> >>>>>   .with(JOINFUNC) // set Bool to false if right == null, true
>> >>>>> otherwise
>> >>>>>
>> >>>>> Best, Fabian
>> >>>>>
>> >>>>> 2016-06-09 2:28 GMT+02:00 Tarandeep Singh <tarandeep@gmail.com>:
>> >>>>>>
>> >>>>>> Hi,
>> >>>>>>
>> >>>>>> I am getting NoSerializableException in this class-
>> >>>>>>
>> >>>>>> 
>> >>>>>>
>> >>>>>> public class RecordsFilterer<T extends GenericRecord>
{
>> >>>>>>
>> >>>>>>     public DataSet<Tuple2<Boolean,T>> addFilterFlag(DataSet<T>
>> >>>>>> dataset, DataSet<String> filteredIds, String fieldName)
{
>> >>>>>>         return dataset.coGroup(filteredIds)
>> >>>>>>                 .where(new KeySelector<T, String>()
{
>> >>>>>>                     @Override
>> >>>>>>                     public String getKey(T t) throws Exception
{
>> >>>>>>                         String s = (String) t.get(fieldName);
>> >>>>>>                         return s != null ? s :
>> >>>>>> UUID.randomUUID().toString();
>> >>>>>>                     }
>> >>>>>>                 })
>> >>>>>>                 .equalTo((KeySelector<String, String>)
s -> s)
>> >>>>>>                 .with(new CoGroupFunction<T, String,
>> >>>>>> Tuple2<Boolean,T>>() {
>> >>>>>>                     @Override
>> >>>>>>                     public void coGroup(Iterable<T>
records,
>> >>>>>> Iterable<String> ids,
>> >>>>>>
>> >>>>>> Collector<Tuple2<Boolean,T>>
>> >>>>>> collector) throws Exception {
>> >>>>>>                         boolean filterFlag = false;
>> >>>>>>                         for (String id : ids) {
>> >>>>>>                             filterFlag = true;
>> >>>>>>                         }
>> >>>>>>
>> >>>>>>                         for (T record : records) {
>> >>>>>>                             collector.collect(new
>> >>>>>> Tuple2<>(filterFlag,
>> >>>>>> record));
>> >>>>>>                         }
>> >>>>>>                     }
>> >>>>>>                 });
>> >>>>>>
>> >>>>>>     }
>> >>>>>> }
>> >>>>>>
>> >>>>>>
>> >>>>>> What I am trying to do is write a generic code that will
join Avro
>> >>>>>> records (of different types) with String records and there
is a
>> >>>>>> match add a
>> >>>>>> filter flag. This way I can use the same code for different
Avro
>> >>>>>> record
>> >>>>>> types. But I am getting this exception-
>> >>>>>>
>> >>>>>> Exception in thread "main"
>> >>>>>> org.apache.flink.optimizer.CompilerException: Error translating
>> >>>>>> node 'Map
>> >>>>>> "Key Extractor" : 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:
>> >>>>>> com.styleseat.dataplatform.etl.jobs.boundary.RecordsFilterer
>> >>>>>>     at
>> >>>>>>
>> >>>>>> org.apache.flink.optimizer.plantranslate.JobGraphGenerator.preVisit(JobGraphGenerator.java:386)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> org.apache.flink.optimizer.plantranslate.JobGraphGenerator.preVisit(JobGraphGenerator.java:109)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> org.apache.flink.optimizer.plan.SingleInputPlanNode.accept(SingleInputPlanNode.java:198)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> org.apache.flink.optimizer.plan.DualInputPlanNode.accept(DualInputPlanNode.java:163)
>> >>>>>>     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:128)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> org.apache.flink.optimizer.plantranslate.JobGraphGenerator.compileJobGraph(JobGraphGenerator.java:188)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> org.apache.flink.client.LocalExecutor.executePlan(LocalExecutor.java:187)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> org.apache.flink.api.java.LocalEnvironment.execute(LocalEnvironment.java:90)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> org.apache.flink.api.java.ExecutionEnvironment.execute(ExecutionEnvironment.java:855)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> com.styleseat.dataplatform.etl.jobs.search.RunSearchLogProcessorV2.runSearchLogProcessor(RunSearchLogProcessorV2.java:57)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> com.styleseat.dataplatform.etl.jobs.search.RunSearchLogProcessorV2.main(RunSearchLogProcessorV2.java:32)
>> >>>>>>     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:497)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
>> >>>>>> 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: RecordsFilterer
>> >>>>>>     at
>> >>>>>>
>> >>>>>> org.apache.flink.runtime.operators.util.TaskConfig.setStubWrapper(TaskConfig.java:275)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> org.apache.flink.optimizer.plantranslate.JobGraphGenerator.createSingleInputVertex(JobGraphGenerator.java:843)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> org.apache.flink.optimizer.plantranslate.JobGraphGenerator.preVisit(JobGraphGenerator.java:331)
>> >>>>>>     ... 17 more
>> >>>>>> Caused by: java.io.NotSerializableException: RecordsFilterer
>> >>>>>>     at
>> >>>>>>
>> >>>>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
>> >>>>>>     at
>> >>>>>> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> org.apache.flink.util.InstantiationUtil.serializeObject(InstantiationUtil.java:300)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> org.apache.flink.util.InstantiationUtil.writeObjectToConfig(InstantiationUtil.java:252)
>> >>>>>>     at
>> >>>>>>
>> >>>>>> org.apache.flink.runtime.operators.util.TaskConfig.setStubWrapper(TaskConfig.java:273)
>> >>>>>>     ... 19 more
>> >>>>>>
>> >>>>>>
>> >>>>>> Please help me understand why I get this exception and how
to fix
>> >>>>>> it
>> >>>>>> [rewrite code may be?]
>> >>>>>>
>> >>>>>> Thanks,
>> >>>>>> Tarandeep
>> >>>>>>
>> >>>>>>
>> >>>>>
>> >>>
>> >>
>> >

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