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https://issues.apache.org/jira/browse/FLINK-6808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16041168#comment-16041168
]
ASF GitHub Bot commented on FLINK-6808:
---------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/flink/pull/4052
> Stream join fails when checkpointing is enabled
> -----------------------------------------------
>
> Key: FLINK-6808
> URL: https://issues.apache.org/jira/browse/FLINK-6808
> Project: Flink
> Issue Type: Bug
> Components: DataStream API
> Affects Versions: 1.3.0
> Reporter: Francisco Rosa
> Assignee: Tzu-Li (Gordon) Tai
> Priority: Blocker
> Labels: flink-rel-1.3.1-blockers
> Fix For: 1.3.1
>
>
> The combination of joining streams and checkpointing fails in 1.3.0. It used
> to work with the previous 1.2 version. Code example for failure:
> {code:title=Example|borderStyle=solid}
> public static void main(String[] args) throws Exception {
> final StreamExecutionEnvironment env =
> StreamExecutionEnvironment.getExecutionEnvironment();
> // enable checkpoints
> env.enableCheckpointing(5000);
> // create two streams
> DataStreamSource<Long> one = env.generateSequence(0, 5000);
> DataStreamSource<Long> two = env.generateSequence(2000, 15000);
> // process both, provide a delay to make sure checkpoint will happen
> DataStream<String> oneProcessed = one.
> map(oneValue -> {
> Thread.sleep(1000);
> return "val-" + oneValue;
> });
> DataStream<String> twoProcessed = two.
> map(oneValue -> {
> Thread.sleep(1000);
> return "val-" + oneValue;
> });
> // join the two streams, join on string match
> DataStream<String> joinedStreams = oneProcessed.
> join(twoProcessed).
> where(String::toString).
> equalTo(String::toString).
> window(TumblingProcessingTimeWindows.of(Time.seconds(5))).
> apply(new JoinFunction<String, String, String>() {
> @Override
> public String join(String oneValue, String twoValue) {
> // nothing really relevant, just concatenate string
> return oneValue + "+" + twoValue;
> }
> });
> // output results
> joinedStreams.print();
> env.execute("Issue with stream join and checkpoints");
> }
> {code}
> Stack trace:
> {noformat}
> java.lang.Exception: Could not perform checkpoint 1 for operator
> TriggerWindow(TumblingProcessingTimeWindows(5000),
> ListStateDescriptor{serializer=org.apache.flink.api.common.typeutils.base.ListSerializer@3769cce0},
> ProcessingTimeTrigger(), WindowedStream.apply(CoGroupedStreams.java:300)) ->
> Sink: Unnamed (1/1).
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.triggerCheckpointOnBarrier(StreamTask.java:550)
> at
> org.apache.flink.streaming.runtime.io.BarrierBuffer.notifyCheckpoint(BarrierBuffer.java:378)
> at
> org.apache.flink.streaming.runtime.io.BarrierBuffer.processBarrier(BarrierBuffer.java:281)
> at
> org.apache.flink.streaming.runtime.io.BarrierBuffer.getNextNonBlocked(BarrierBuffer.java:183)
> at
> org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:213)
> at
> org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:69)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:262)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:702)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.Exception: Could not complete snapshot 1 for operator
> TriggerWindow(TumblingProcessingTimeWindows(5000),
> ListStateDescriptor{serializer=org.apache.flink.api.common.typeutils.base.ListSerializer@3769cce0},
> ProcessingTimeTrigger(), WindowedStream.apply(CoGroupedStreams.java:300)) ->
> Sink: Unnamed (1/1).
> at
> org.apache.flink.streaming.api.operators.AbstractStreamOperator.snapshotState(AbstractStreamOperator.java:406)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask$CheckpointingOperation.checkpointStreamOperator(StreamTask.java:1157)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask$CheckpointingOperation.executeCheckpointing(StreamTask.java:1089)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.checkpointState(StreamTask.java:653)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.performCheckpoint(StreamTask.java:589)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.triggerCheckpointOnBarrier(StreamTask.java:542)
> ... 8 more
> Caused by: java.lang.UnsupportedOperationException: This serializer is not
> registered for managed state.
> at
> org.apache.flink.streaming.api.datastream.CoGroupedStreams$UnionSerializer.snapshotConfiguration(CoGroupedStreams.java:555)
> at
> org.apache.flink.api.common.typeutils.CompositeTypeSerializerConfigSnapshot.<init>(CompositeTypeSerializerConfigSnapshot.java:53)
> at
> org.apache.flink.api.common.typeutils.base.CollectionSerializerConfigSnapshot.<init>(CollectionSerializerConfigSnapshot.java:39)
> at
> org.apache.flink.runtime.state.ArrayListSerializer.snapshotConfiguration(ArrayListSerializer.java:149)
> at
> org.apache.flink.runtime.state.RegisteredKeyedBackendStateMetaInfo.snapshot(RegisteredKeyedBackendStateMetaInfo.java:71)
> at
> org.apache.flink.runtime.state.heap.HeapKeyedStateBackend.snapshot(HeapKeyedStateBackend.java:267)
> at
> org.apache.flink.streaming.api.operators.AbstractStreamOperator.snapshotState(AbstractStreamOperator.java:396)
> ... 13 more
> {noformat}
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