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https://issues.apache.org/jira/browse/FLINK-4719?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joshua Griffith updated FLINK-4719:
-----------------------------------
Comment: was deleted
(was: I'm also experiencing this issue when using the distinct transform. I
thought it was an issue with the generic serializers so I wrote and registered
custom Kryo serializers for each type but I'm still getting this error when
spilling to disk using Flink 1.3.0-RC0. Does anyone know of a workaround?)
> KryoSerializer random exception
> -------------------------------
>
> Key: FLINK-4719
> URL: https://issues.apache.org/jira/browse/FLINK-4719
> Project: Flink
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.1.1
> Reporter: Flavio Pompermaier
> Labels: kryo, serialization
>
> There's a random exception that involves somehow the KryoSerializer when
> using POJOs in Flink jobs reading large volumes of data.
> It is usually thrown in several places, e.g. (the Exceptions reported here
> can refer to previous versions of Flink...):
> {code}
> java.lang.Exception: The data preparation for task 'CHAIN GroupReduce
> (GroupReduce at createResult(IndexMappingExecutor.java:42)) -> Map (Map at
> main(Jsonizer.java:128))' , caused an error: Error obtaining the sorted
> input: Thread 'SortMerger spilling thread' terminated due to an exception:
> Unable to find class: java.ttil.HashSet
> at
> org.apache.flink.runtime.operators.BatchTask.run(BatchTask.java:456)
> at
> org.apache.flink.runtime.operators.BatchTask.invoke(BatchTask.java:345)
> 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 spilling thread' terminated due to an exception: Unable to
> find class: java.ttil.HashSet
> 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.GroupReduceDriver.prepare(GroupReduceDriver.java:94)
> at
> org.apache.flink.runtime.operators.BatchTask.run(BatchTask.java:450)
> ... 3 more
> Caused by: java.io.IOException: Thread 'SortMerger spilling thread'
> terminated due to an exception: Unable to find class: java.ttil.HashSet
> at
> org.apache.flink.runtime.operators.sort.UnilateralSortMerger$ThreadBase.run(UnilateralSortMerger.java:800)
> Caused by: com.esotericsoftware.kryo.KryoException: Unable to find class:
> java.ttil.HashSet
> at
> com.esotericsoftware.kryo.util.DefaultClassResolver.readName(DefaultClassResolver.java:138)
> at
> com.esotericsoftware.kryo.util.DefaultClassResolver.readClass(DefaultClassResolver.java:115)
> at com.esotericsoftware.kryo.Kryo.readClass(Kryo.java:641)
> at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:752)
> at
> com.esotericsoftware.kryo.serializers.MapSerializer.read(MapSerializer.java:143)
> at
> com.esotericsoftware.kryo.serializers.MapSerializer.read(MapSerializer.java:21)
> at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:761)
> at
> org.apache.flink.api.java.typeutils.runtime.kryo.KryoSerializer.deserialize(KryoSerializer.java:228)
> at
> org.apache.flink.api.java.typeutils.runtime.kryo.KryoSerializer.deserialize(KryoSerializer.java:242)
> at
> org.apache.flink.api.java.typeutils.runtime.kryo.KryoSerializer.copy(KryoSerializer.java:252)
> at
> org.apache.flink.api.java.typeutils.runtime.PojoSerializer.copy(PojoSerializer.java:556)
> at
> org.apache.flink.api.java.typeutils.runtime.TupleSerializerBase.copy(TupleSerializerBase.java:75)
> at
> org.apache.flink.runtime.operators.sort.NormalizedKeySorter.writeToOutput(NormalizedKeySorter.java:499)
> at
> org.apache.flink.runtime.operators.sort.UnilateralSortMerger$SpillingThread.go(UnilateralSortMerger.java:1344)
> at
> org.apache.flink.runtime.operators.sort.UnilateralSortMerger$ThreadBase.run(UnilateralSortMerger.java:796)
> Caused by: java.lang.ClassNotFoundException: java.ttil.HashSet
> at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:348)
> at
> com.esotericsoftware.kryo.util.DefaultClassResolver.readName(DefaultClassResolver.java:136)
> {code}
> {code}
> Caused by: java.io.IOException: Serializer consumed more bytes than the
> record had. This indicates broken serialization. If you are using custom
> serialization types (Value or Writable), check their serialization methods.
> If you are using a Kryo-serialized type, check the corresponding Kryo
> serializer.
> at
> org.apache.flink.runtime.io.network.api.serialization.SpillingAdaptiveSpanningRecordDeserializer.getNextRecord(SpillingAdaptiveSpanningRecordDeserializer.java:142)
> at
> org.apache.flink.runtime.io.network.api.reader.AbstractRecordReader.getNextRecord(AbstractRecordReader.java:65)
> at
> org.apache.flink.runtime.io.network.api.reader.MutableRecordReader.next(MutableRecordReader.java:34)
> at
> org.apache.flink.runtime.operators.util.ReaderIterator.next(ReaderIterator.java:73)
> at
> org.apache.flink.runtime.operators.FlatMapDriver.run(FlatMapDriver.java:101)
> at org.apache.flink.runtime.operators.BatchTask.run(BatchTask.java:480)
> at org.apache.flink.runtime.operators.BatchTask.invoke(BatchTask.java:345)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:559)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.ArrayIndexOutOfBoundsException: -2
> at java.util.ArrayList.elementData(ArrayList.java:418)
> at java.util.ArrayList.get(ArrayList.java:431)
> at
> com.esotericsoftware.kryo.util.MapReferenceResolver.getReadObject(MapReferenceResolver.java:42)
> at com.esotericsoftware.kryo.Kryo.readReferenceOrNull(Kryo.java:805)
> at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:759)
> at
> org.apache.flink.api.java.typeutils.runtime.kryo.KryoSerializer.deserialize(KryoSerializer.java:228)
> at
> org.apache.flink.api.java.typeutils.runtime.PojoSerializer.deserialize(PojoSerializer.java:431)
> at
> org.apache.flink.api.java.typeutils.runtime.TupleSerializer.deserialize(TupleSerializer.java:135)
> at
> org.apache.flink.api.java.typeutils.runtime.TupleSerializer.deserialize(TupleSerializer.java:30)
> at
> org.apache.flink.runtime.plugable.NonReusingDeserializationDelegate.read(NonReusingDeserializationDelegate.java:55)
> at
> org.apache.flink.runtime.io.network.api.serialization.SpillingAdaptiveSpanningRecordDeserializer.getNextRecord(SpillingAdaptiveSpanningRecordDeserializer.java:124)
> {code}
> {code}
> java.lang.RuntimeException: Cannot instantiate class.
> at
> org.apache.flink.api.java.typeutils.runtime.PojoSerializer.deserialize(PojoSerializer.java:407)
> at
> org.apache.flink.runtime.plugable.NonReusingDeserializationDelegate.read(NonReusingDeserializationDelegate.java:55)
> at
> org.apache.flink.runtime.io.network.api.serialization.SpillingAdaptiveSpanningRecordDeserializer.getNextRecord(SpillingAdaptiveSpanningRecordDeserializer.java:124)
> at
> org.apache.flink.runtime.io.network.api.reader.AbstractRecordReader.getNextRecord(AbstractRecordReader.java:65)
> at
> org.apache.flink.runtime.io.network.api.reader.MutableRecordReader.next(MutableRecordReader.java:34)
> at
> org.apache.flink.runtime.operators.util.ReaderIterator.next(ReaderIterator.java:73)
> at
> org.apache.flink.runtime.operators.FlatMapDriver.run(FlatMapDriver.java:101)
> at org.apache.flink.runtime.operators.BatchTask.run(BatchTask.java:480)
> at
> org.apache.flink.runtime.operators.BatchTask.invoke(BatchTask.java:345)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:559)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.ClassNotFoundException:
> it.okkam.flink.test.model.pojo.VdhicleEvent
> at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:348)
> at
> org.apache.flink.api.java.typeutils.runtime.PojoSerializer.deserialize(PojoSerializer.java:405)
> ... 10 more
> {code}
> {code}
> com.esotericsoftware.kryo.KryoException: Unable to find class: ^Z^A
> at
> com.esotericsoftware.kryo.util.DefaultClassResolver.readName(DefaultClassResolver.java:138)
> at
> com.esotericsoftware.kryo.util.DefaultClassResolver.readClass(DefaultClassResolver.java:115)
> at com.esotericsoftware.kryo.Kryo.readClass(Kryo.java:641)
> at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:752)
> at
> org.apache.flink.api.java.typeutils.runtime.kryo.KryoSerializer.deserialize(KryoSerializer.java:228)
> at
> org.apache.flink.api.java.typeutils.runtime.PojoSerializer.deserialize(PojoSerializer.java:431)
> at
> org.apache.flink.runtime.plugable.NonReusingDeserializationDelegate.read(NonReusingDeserializationDelegate.java:55)
> at
> org.apache.flink.runtime.io.network.api.serialization.SpillingAdaptiveSpanningRecordDeserializer.getNextRecord(SpillingAdaptiveSpanningRecordDeserializer.java:124)
> at
> org.apache.flink.runtime.io.network.api.reader.AbstractRecordReader.getNextRecord(AbstractRecordReader.java:65)
> at
> org.apache.flink.runtime.io.network.api.reader.MutableRecordReader.next(MutableRecordReader.java:34)
> at
> org.apache.flink.runtime.operators.util.ReaderIterator.next(ReaderIterator.java:73)
> at org.apache.flink.runtime.operators.MapDriver.run(MapDriver.java:96)
> at
> org.apache.flink.runtime.operators.BatchTask.run(BatchTask.java:480)
> at
> org.apache.flink.runtime.operators.BatchTask.invoke(BatchTask.java:345)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:559)
> at java.lang.Thread.run(Thread.java:745)
> {code}
> {code}
> Caused by: java.lang.ArrayIndexOutOfBoundsException: -2
> at java.util.ArrayList.elementData(ArrayList.java:418)
> at java.util.ArrayList.get(ArrayList.java:431)
> at
> com.esotericsoftware.kryo.util.MapReferenceResolver.getReadObject(MapReferenceResolver.java:42)
> at com.esotericsoftware.kryo.Kryo.readReferenceOrNull(Kryo.java:805)
> at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:759)
> at
> com.esotericsoftware.kryo.serializers.MapSerializer.read(MapSerializer.java:135)
> at
> com.esotericsoftware.kryo.serializers.MapSerializer.read(MapSerializer.java:21)
> at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:761)
> at
> org.apache.flink.api.java.typeutils.runtime.kryo.KryoSerializer.deserialize(KryoSerializer.java:232)
> at
> org.apache.flink.api.java.typeutils.runtime.PojoSerializer.deserialize(PojoSerializer.java:431)
> at
> org.apache.flink.api.java.typeutils.runtime.TupleSerializer.deserialize(TupleSerializer.java:135)
> at
> org.apache.flink.api.java.typeutils.runtime.TupleSerializer.deserialize(TupleSerializer.java:30)
> at
> org.apache.flink.runtime.io.disk.ChannelReaderInputViewIterator.next(ChannelReaderInputViewIterator.java:100)
> at
> org.apache.flink.runtime.operators.sort.MergeIterator$HeadStream.nextHead(MergeIterator.java:161)
> at
> org.apache.flink.runtime.operators.sort.MergeIterator.next(MergeIterator.java:113)
> at
> org.apache.flink.runtime.operators.util.metrics.CountingMutableObjectIterator.next(CountingMutableObjectIterator.java:45)
> at
> org.apache.flink.runtime.util.NonReusingKeyGroupedIterator.advanceToNext(NonReusingKeyGroupedIterator.java:130)
> at
> org.apache.flink.runtime.util.NonReusingKeyGroupedIterator.access$300(NonReusingKeyGroupedIterator.java:32)
> at
> org.apache.flink.runtime.util.NonReusingKeyGroupedIterator$ValuesIterator.next(NonReusingKeyGroupedIterator.java:192)
> at
> org.okkam.entitons.mapping.flink.IndexMappingExecutor$TupleToEntitonJsonNode.reduce(IndexMappingExecutor.java:64)
> at
> org.apache.flink.runtime.operators.GroupReduceDriver.run(GroupReduceDriver.java:131)
> at org.apache.flink.runtime.operators.BatchTask.run(BatchTask.java:486)
> at
> org.apache.flink.runtime.operators.BatchTask.invoke(BatchTask.java:351)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:584)
> at java.lang.Thread.run(Thread.java:745)
> {code}
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