[jira] [Created] (FLINK-1956) Runtime context not initialized in RichWindowMapFunction

[Shang Yuanchun (Jira)]

Daniel Bali created FLINK-1956:
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             Summary: Runtime context not initialized in RichWindowMapFunction
                 Key: FLINK-1956
                 URL: https://issues.apache.org/jira/browse/FLINK-1956
             Project: Flink
          Issue Type: Bug
          Components: Streaming
            Reporter: Daniel Bali
            Assignee: Marton Balassi


Trying to access the runtime context in a rich window map function results in an exception. The following snippet demonstrates the bug:

env.generateSequence(0, 1000)
    .window(Count.of(10))
    .mapWindow(new RichWindowMapFunction<Long, Tuple2<Long, Long>>() {
        @Override
        public void mapWindow(Iterable<Long> input, Collector<Tuple2<Long, Long>> out) throws Exception {
            long self = getRuntimeContext().getIndexOfThisSubtask();
            for (long value : input) {
                out.collect(new Tuple2<>(self, value));
            }
        }
    }).flatten().print();



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