[BEAM-1255] java.io.NotSerializableException in flink on UnboundedSource

• Type: Bug
• Status: Resolved
• Priority: P2
• Resolution: Fixed
• Affects Version/s: 0.5.0
• Fix Version/s: 0.5.0
• Component/s: runner-flink
• Assignee: Alexey Diomin
• Reporter: Alexey Diomin
• Created: 10/Jan/17 17:29
• Updated: 16/May/20 13:58
• Resolved: 22/Jan/17 11:54

Description

After introduce new Coders with TypeDescriptor on flink runner we have issue:

Caused by: java.io.NotSerializableException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl
	- element of array (index: 0)
	- array (class "[Ljava.lang.Object;", size: 2)
	- field (class "com.google.common.collect.ImmutableList$SerializedForm", name: "elements", type: "class [Ljava.lang.Object;")
	- object (class "com.google.common.collect.ImmutableList$SerializedForm", com.google.common.collect.ImmutableList$SerializedForm@30af5b6b)
	- field (class "com.google.common.reflect.Types$ParameterizedTypeImpl", name: "argumentsList", type: "class com.google.common.collect.ImmutableList")
	- object (class "com.google.common.reflect.Types$ParameterizedTypeImpl", org.apache.beam.sdk.io.UnboundedSource<OutputT, CheckpointMarkT>)
	- field (class "com.google.common.reflect.TypeToken", name: "runtimeType", type: "interface java.lang.reflect.Type")
	- object (class "com.google.common.reflect.TypeToken$SimpleTypeToken", org.apache.beam.sdk.io.UnboundedSource<OutputT, CheckpointMarkT>)
	- field (class "org.apache.beam.sdk.values.TypeDescriptor", name: "token", type: "class com.google.common.reflect.TypeToken")
	- object (class "org.apache.beam.runners.flink.translation.wrappers.streaming.io.UnboundedSourceWrapper$1", org.apache.beam.sdk.io.UnboundedSource<OutputT, CheckpointMarkT>)
	- field (class "org.apache.beam.sdk.coders.SerializableCoder", name: "typeDescriptor", type: "class org.apache.beam.sdk.values.TypeDescriptor")
	- object (class "org.apache.beam.sdk.coders.SerializableCoder", SerializableCoder)
	- field (class "org.apache.beam.sdk.coders.KvCoder", name: "keyCoder", type: "interface org.apache.beam.sdk.coders.Coder")
	- object (class "org.apache.beam.sdk.coders.KvCoder", KvCoder(SerializableCoder,AvroCoder))
	- field (class "org.apache.beam.sdk.coders.IterableLikeCoder", name: "elementCoder", type: "interface org.apache.beam.sdk.coders.Coder")
	- object (class "org.apache.beam.sdk.coders.ListCoder", ListCoder(KvCoder(SerializableCoder,AvroCoder)))
	- field (class "org.apache.beam.runners.flink.translation.wrappers.streaming.io.UnboundedSourceWrapper", name: "checkpointCoder", type: "class org.apache.beam.sdk.coders.ListCoder")
	- root object (class "org.apache.beam.runners.flink.translation.wrappers.streaming.io.UnboundedSourceWrapper", org.apache.beam.runners.flink.translation.wrappers.streaming.io.UnboundedSourceWrapper@b2c5e07)
	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1182)

bug introduced after commit:
7b98fa08d14e8121e8885f00a9a9a878b73f81a6

pull request:
https://github.com/apache/beam/pull/1537

Code for reproduce error

import com.google.common.collect.ImmutableList;
import org.apache.beam.runners.flink.FlinkPipelineOptions;
import org.apache.beam.runners.flink.FlinkRunner;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.io.kafka.KafkaIO;
import org.apache.beam.sdk.options.PipelineOptionsFactory;

public class FlinkSerialisationError {

    public static void main(String[] args) {
        FlinkPipelineOptions options = PipelineOptionsFactory.as(FlinkPipelineOptions.class);
        options.setRunner(FlinkRunner.class);
        options.setStreaming(true);


        Pipeline pipeline = Pipeline.create(options);

        pipeline.apply(
                KafkaIO.read()
                    .withBootstrapServers("localhost:9092")
                    .withTopics(ImmutableList.of("test"))
                    // set ConsumerGroup
                    .withoutMetadata());

        pipeline.run();
    }
}

Issue Links

• is related to: BEAM-597 Provide type information from Coders
• links to: GitHub Pull Request #1770