No accumulator results in streaming

Posted by LINZ, Arnaud on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/No-accumulator-results-in-streaming-tp2092.html

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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