Timo Walther created FLINK-8282:
-----------------------------------
Summary: Transformation with TwoInputStreamOperator fails
Key: FLINK-8282
URL: https://issues.apache.org/jira/browse/FLINK-8282
Project: Flink
Issue Type: Bug
Components: DataStream API
Reporter: Timo Walther
The following program fails because of multiple reasons (see exceptions below).
The transformation with a {{TwoInputStreamOperator}} does not extend
{{AbstractStreamOperator}}. I think this is the main cause why it fails. Either
we fix the exceptions or we check for {{AbstractStreamOperator}} first.
{code}
final StreamExecutionEnvironment env =
StreamExecutionEnvironment.getExecutionEnvironment();
env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);
DataStream<Integer> ds1 = env.addSource(new
SourceFunction<Integer>() {
@Override
public void run(SourceContext<Integer> ctx) throws
Exception {
ctx.emitWatermark(new Watermark(100L));
ctx.collect(12);
while (true) Thread.yield();
}
@Override
public void cancel() {
}
});
DataStream<Integer> ds2 = env.addSource(new
SourceFunction<Integer>() {
@Override
public void run(SourceContext<Integer> ctx) throws
Exception {
ctx.emitWatermark(new Watermark(200L));
ctx.collect(12);
while (true) Thread.yield();
}
@Override
public void cancel() {
}
});
ds1.connect(ds2.broadcast()).transform("test", Types.INT, new
TwoInputStreamOperator<Integer, Integer, Integer>() {
@Override
public void processElement1(StreamRecord<Integer>
element) throws Exception {
System.out.println();
}
@Override
public void processElement2(StreamRecord<Integer>
element) throws Exception {
System.out.println();
}
@Override
public void processWatermark1(Watermark mark) throws
Exception {
System.out.println();
}
@Override
public void processWatermark2(Watermark mark) throws
Exception {
System.out.println();
}
@Override
public void processLatencyMarker1(LatencyMarker
latencyMarker) throws Exception {
}
@Override
public void processLatencyMarker2(LatencyMarker
latencyMarker) throws Exception {
}
@Override
public void setup(StreamTask<?, ?> containingTask,
StreamConfig config, Output<StreamRecord<Integer>> output) {
}
@Override
public void open() throws Exception {
}
@Override
public void close() throws Exception {
}
@Override
public void dispose() throws Exception {
}
@Override
public OperatorSnapshotResult snapshotState(long
checkpointId, long timestamp, CheckpointOptions checkpointOptions) throws
Exception {
return null;
}
@Override
public void initializeState(OperatorSubtaskState
stateHandles) throws Exception {
}
@Override
public void notifyOfCompletedCheckpoint(long
checkpointId) throws Exception {
}
@Override
public void setKeyContextElement1(StreamRecord<?>
record) throws Exception {
}
@Override
public void setKeyContextElement2(StreamRecord<?>
record) throws Exception {
}
@Override
public ChainingStrategy getChainingStrategy() {
return null;
}
@Override
public void setChainingStrategy(ChainingStrategy
strategy) {
}
@Override
public MetricGroup getMetricGroup() {
return null;
}
@Override
public OperatorID getOperatorID() {
return null;
}
}).print();
// execute program
env.execute("Streaming WordCount");
{code}
Exceptions are either:
{code}
16:27:51,177 WARN
org.apache.flink.streaming.api.operators.AbstractStreamOperator - Error while
emitting latency marker.
java.lang.RuntimeException: Buffer pool is destroyed.
at
org.apache.flink.streaming.runtime.io.RecordWriterOutput.emitLatencyMarker(RecordWriterOutput.java:141)
at
org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.emitLatencyMarker(AbstractStreamOperator.java:825)
at
org.apache.flink.streaming.api.operators.StreamSource$LatencyMarksEmitter$1.onProcessingTime(StreamSource.java:150)
at
org.apache.flink.streaming.runtime.tasks.SystemProcessingTimeService$RepeatedTriggerTask.run(SystemProcessingTimeService.java:294)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalStateException: Buffer pool is destroyed.
at
org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBuffer(LocalBufferPool.java:203)
at
org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBlocking(LocalBufferPool.java:191)
at
org.apache.flink.runtime.io.network.api.writer.RecordWriter.sendToTarget(RecordWriter.java:132)
at
org.apache.flink.runtime.io.network.api.writer.RecordWriter.randomEmit(RecordWriter.java:107)
at
org.apache.flink.streaming.runtime.io.StreamRecordWriter.randomEmit(StreamRecordWriter.java:102)
at
org.apache.flink.streaming.runtime.io.RecordWriterOutput.emitLatencyMarker(RecordWriterOutput.java:138)
... 10 more
{code}
or
{code}
16:33:53,826 WARN
org.apache.flink.streaming.runtime.io.StreamTwoInputProcessor - An exception
occurred during the metrics setup.
java.lang.NullPointerException
at
org.apache.flink.streaming.runtime.io.StreamTwoInputProcessor.processInput(StreamTwoInputProcessor.java:211)
at
org.apache.flink.streaming.runtime.tasks.TwoInputStreamTask.run(TwoInputStreamTask.java:91)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:278)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:724)
at java.lang.Thread.run(Thread.java:745)
{code}
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