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https://issues.apache.org/jira/browse/FLINK-19411?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Piotr Nowojski closed FLINK-19411.
----------------------------------
Resolution: Fixed
Merged to master as 7bfd8ec1e3
> MultipleInputStreamTask fails with RuntimeException when its input contains
> union
> ---------------------------------------------------------------------------------
>
> Key: FLINK-19411
> URL: https://issues.apache.org/jira/browse/FLINK-19411
> Project: Flink
> Issue Type: Bug
> Components: API / DataStream
> Affects Versions: 1.12.0
> Reporter: Caizhi Weng
> Assignee: Piotr Nowojski
> Priority: Critical
> Labels: pull-request-available
> Fix For: 1.12.0
>
>
> MultipleInputStreamTask fails with the following exception stack when its
> input contains union.
> {code}
> Caused by: java.lang.RuntimeException: No such input gate.
> at
> org.apache.flink.streaming.runtime.io.InputGateUtil.createInputGate(InputGateUtil.java:37)
> at
> java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
> at
> java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
> at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
> at
> java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
> at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:545)
> at
> java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260)
> at
> java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:438)
> at
> org.apache.flink.streaming.runtime.io.InputProcessorUtil.createCheckpointedMultipleInputGate(InputProcessorUtil.java:104)
> at
> org.apache.flink.streaming.runtime.tasks.MultipleInputStreamTask.createInputProcessor(MultipleInputStreamTask.java:120)
> at
> org.apache.flink.streaming.runtime.tasks.MultipleInputStreamTask.init(MultipleInputStreamTask.java:98)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.beforeInvoke(StreamTask.java:480)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:550)
> at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:722)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:547)
> at java.lang.Thread.run(Thread.java:748)
> {code}
> Add the following test case to {{MultipleInputITCase}} will reproduce this
> bug.
> {code:java}
> @Test
> public void testUnion() throws Exception {
> StreamExecutionEnvironment env =
> StreamExecutionEnvironment.getExecutionEnvironment();
> env.setParallelism(1);
> TestListResultSink<Long> resultSink = new TestListResultSink<>();
> DataStream<Long> source1 = env.fromElements(1L, 10L);
> DataStream<Long> source2 = env.fromElements(2L, 11L);
> DataStream<String> source3 = env.fromElements("42", "44");
> UnionTransformation<Long> union = new UnionTransformation<>(
> Arrays.asList(source1.getTransformation(),
> source2.getTransformation()));
> MultipleInputTransformation<Long> multipleInput = new
> MultipleInputTransformation<>(
> "My Operator",
> new SumAllInputOperatorFactory(),
> BasicTypeInfo.LONG_TYPE_INFO,
> 1);
> env.addOperator(multipleInput
> .addInput(union)
> .addInput(source3.getTransformation()));
> new MultipleConnectedStreams(env)
> .transform(multipleInput)
> .addSink(resultSink);
> env.execute();
> List<Long> result = resultSink.getResult();
> Collections.sort(result);
> long actualSum = result.get(result.size() - 1);
> assertEquals(1 + 10 + 2 + 11 + 42 + 44, actualSum);
> }
> {code}
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