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https://issues.apache.org/jira/browse/FLINK-1392?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Robert Metzger resolved FLINK-1392.
-----------------------------------
       Resolution: Fixed
    Fix Version/s: 0.9

Resolved for 0.9 in master with commit: 
http://git-wip-us.apache.org/repos/asf/flink/commit/77c45484

> Serializing Protobuf - issue 1
> ------------------------------
>
>                 Key: FLINK-1392
>                 URL: https://issues.apache.org/jira/browse/FLINK-1392
>             Project: Flink
>          Issue Type: Sub-task
>    Affects Versions: 0.8, 0.9
>            Reporter: Felix Neutatz
>            Assignee: Robert Metzger
>            Priority: Minor
>             Fix For: 0.9, 0.8.1
>
>
> Hi, I started to experiment with Parquet using Protobuf.
> When I use the standard Protobuf class: 
> com.twitter.data.proto.tutorial.AddressBookProtos
> The code which I run, can be found here: 
> [https://github.com/FelixNeutatz/incubator-flink/blob/ParquetAtFlink/flink-addons/flink-hadoop-compatibility/src/main/java/org/apache/flink/hadoopcompatibility/mapreduce/example/ParquetProtobufOutput.java]
> I get the following exception:
> {code:xml}
>     Exception in thread "main" java.lang.Exception: Deserializing the 
> InputFormat (org.apache.flink.api.java.io.CollectionInputFormat) failed: 
> Could not read the user code wrapper: Error while deserializing element from 
> collection
>       at 
> org.apache.flink.runtime.jobgraph.InputFormatVertex.initializeOnMaster(InputFormatVertex.java:60)
>       at 
> org.apache.flink.runtime.jobmanager.JobManager$$anonfun$receiveWithLogMessages$1$$anonfun$applyOrElse$5.apply(JobManager.scala:179)
>       at 
> org.apache.flink.runtime.jobmanager.JobManager$$anonfun$receiveWithLogMessages$1$$anonfun$applyOrElse$5.apply(JobManager.scala:172)
>       at scala.collection.Iterator$class.foreach(Iterator.scala:727)
>       at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
>       at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
>       at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
>       at 
> org.apache.flink.runtime.jobmanager.JobManager$$anonfun$receiveWithLogMessages$1.applyOrElse(JobManager.scala:172)
>       at 
> scala.runtime.AbstractPartialFunction$mcVL$sp.apply$mcVL$sp(AbstractPartialFunction.scala:33)
>       at 
> scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:33)
>       at 
> scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:25)
>       at 
> org.apache.flink.runtime.ActorLogMessages$$anon$1.apply(ActorLogMessages.scala:34)
>       at 
> org.apache.flink.runtime.ActorLogMessages$$anon$1.apply(ActorLogMessages.scala:27)
>       at scala.PartialFunction$class.applyOrElse(PartialFunction.scala:118)
>       at 
> org.apache.flink.runtime.ActorLogMessages$$anon$1.applyOrElse(ActorLogMessages.scala:27)
>       at akka.actor.Actor$class.aroundReceive(Actor.scala:465)
>       at 
> org.apache.flink.runtime.jobmanager.JobManager.aroundReceive(JobManager.scala:52)
>       at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)
>       at akka.actor.ActorCell.invoke(ActorCell.scala:487)
>       at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:254)
>       at akka.dispatch.Mailbox.run(Mailbox.scala:221)
>       at akka.dispatch.Mailbox.exec(Mailbox.scala:231)
>       at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
>       at 
> scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
>       at 
> scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
>       at 
> scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
> Caused by: 
> org.apache.flink.runtime.operators.util.CorruptConfigurationException: Could 
> not read the user code wrapper: Error while deserializing element from 
> collection
>       at 
> org.apache.flink.runtime.operators.util.TaskConfig.getStubWrapper(TaskConfig.java:285)
>       at 
> org.apache.flink.runtime.jobgraph.InputFormatVertex.initializeOnMaster(InputFormatVertex.java:57)
>       ... 25 more
> Caused by: java.io.IOException: Error while deserializing element from 
> collection
>       at 
> org.apache.flink.api.java.io.CollectionInputFormat.readObject(CollectionInputFormat.java:108)
>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>       at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>       at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.lang.reflect.Method.invoke(Method.java:606)
>       at 
> java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)
>       at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893)
>       at 
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
>       at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
>       at 
> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
>       at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
>       at 
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
>       at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
>       at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
>       at 
> org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:274)
>       at 
> org.apache.flink.util.InstantiationUtil.readObjectFromConfig(InstantiationUtil.java:236)
>       at 
> org.apache.flink.runtime.operators.util.TaskConfig.getStubWrapper(TaskConfig.java:281)
>       ... 26 more
> Caused by: com.esotericsoftware.kryo.KryoException: 
> java.lang.UnsupportedOperationException
> Serialization trace:
> phone_ (com.twitter.data.proto.tutorial.AddressBookProtos$Person)
>       at 
> com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:125)
>       at 
> com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:528)
>       at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:761)
>       at 
> org.apache.flink.api.java.typeutils.runtime.KryoSerializer.deserialize(KryoSerializer.java:130)
>       at 
> org.apache.flink.api.java.typeutils.runtime.TupleSerializer.deserialize(TupleSerializer.java:106)
>       at 
> org.apache.flink.api.java.typeutils.runtime.TupleSerializer.deserialize(TupleSerializer.java:30)
>       at 
> org.apache.flink.api.java.io.CollectionInputFormat.readObject(CollectionInputFormat.java:103)
>       ... 42 more
> Caused by: java.lang.UnsupportedOperationException
>       at 
> java.util.Collections$UnmodifiableCollection.add(Collections.java:1075)
>       at 
> com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:109)
>       at 
> com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:22)
>       at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:679)
>       at 
> com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:106)
>       ... 48 more
> {code}



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