Hello,
I’m struggling with this simple issue for hours now : I am unable to get the
accumulator result of a streaming context result, the accumulator map in the
JobExecutionResult is always empty.
Simple test code (directly inspired from the documentation) :
My source =
public static class oneRandomNumberSource implements
SourceFunction<Integer>, Serializable {
@Override
public void
run(org.apache.flink.streaming.api.functions.source.SourceFunction.SourceContext<Integer>
ctx)
throws Exception {
final Random rnd = new Random(29172);
ctx.collect(rnd.nextInt());
}
@Override
public void cancel() {
}
}
My exec program =
public static final String COUNTER_NBLINE = "num-lines";
void test() {
final StreamExecutionEnvironment env = getCluster();
final SourceFunction<Integer> source = new
oneRandomNumberSource();
env.addSource(source).addSink(new RichSinkFunction<Integer>() {
private IntCounter numLines = new IntCounter();
@Override
public void open(Configuration parameters) throws Exception
{ // NOPMD
getRuntimeContext().addAccumulator(COUNTER_NBLINE,
this.numLines);
}
@Override
public void invoke(Integer value) throws Exception {
System.err.println(value);
numLines.add(1);
}
});
try {
final JobExecutionResult result = env.execute();
System.out.println(result.getAccumulatorResult(COUNTER_NBLINE)); // Problem :
always null
}
catch (Exception e) {
e.printStackTrace();
}
}
Console output :
07/16/2015 14:11:58 Job execution switched to status RUNNING.
07/16/2015 14:11:58 Custom Source(1/1) switched to SCHEDULED
07/16/2015 14:11:58 Custom Source(1/1) switched to DEPLOYING
07/16/2015 14:11:58 Stream Sink(1/4) switched to SCHEDULED
07/16/2015 14:11:58 Stream Sink(1/4) switched to DEPLOYING
07/16/2015 14:11:58 Stream Sink(2/4) switched to SCHEDULED
07/16/2015 14:11:58 Stream Sink(2/4) switched to DEPLOYING
07/16/2015 14:11:58 Stream Sink(3/4) switched to SCHEDULED
07/16/2015 14:11:58 Stream Sink(3/4) switched to DEPLOYING
07/16/2015 14:11:58 Stream Sink(4/4) switched to SCHEDULED
07/16/2015 14:11:58 Stream Sink(4/4) switched to DEPLOYING
07/16/2015 14:11:58 Custom Source(1/1) switched to RUNNING
07/16/2015 14:11:58 Stream Sink(1/4) switched to RUNNING
07/16/2015 14:11:58 Stream Sink(2/4) switched to RUNNING
07/16/2015 14:11:58 Stream Sink(4/4) switched to RUNNING
07/16/2015 14:11:58 Stream Sink(3/4) switched to RUNNING
07/16/2015 14:11:58 Custom Source(1/1) switched to FINISHED
07/16/2015 14:11:58 Stream Sink(4/4) switched to FINISHED
07/16/2015 14:11:58 Stream Sink(3/4) switched to FINISHED
-329782788
07/16/2015 14:11:58 Stream Sink(2/4) switched to FINISHED
07/16/2015 14:11:58 Stream Sink(1/4) switched to FINISHED
07/16/2015 14:11:58 Job execution switched to status FINISHED.
null
What am I doing wrong ?
Flink version is 0.9.0
Best regards,
Arnaud
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