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https://issues.apache.org/jira/browse/FLINK-8090?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kostas Kloudas reassigned FLINK-8090:
-------------------------------------
Assignee: Kostas Kloudas
> An operator should not be able to register two states with the same name.
> -------------------------------------------------------------------------
>
> Key: FLINK-8090
> URL: https://issues.apache.org/jira/browse/FLINK-8090
> Project: Flink
> Issue Type: Bug
> Components: DataStream API
> Affects Versions: 1.4.0
> Reporter: Kostas Kloudas
> Assignee: Kostas Kloudas
>
> Currently a {{ProcessFunction}} like this is a valid job:
> {code}
> final MapStateDescriptor<Integer, Tuple2<Integer, Long>>
> firstMapStateDescriptor = new MapStateDescriptor<>(
> "timon-one",
> BasicTypeInfo.INT_TYPE_INFO,
> source.getType());
> final MapStateDescriptor<Integer, Tuple2<Integer, Long>>
> secondMapStateDescriptor = new MapStateDescriptor<>(
> "timon-one",
> BasicTypeInfo.INT_TYPE_INFO,
> source.getType());
> new ProcessFunction<Tuple2<Integer, Long>, Object>() {
> private static final long serialVersionUID =
> -805125545438296619L;
> private transient MapState<Integer,
> Tuple2<Integer, Long>> firstMapState;
> private transient MapState<Integer,
> Tuple2<Integer, Long>> secondMapState;
> @Override
> public void open(Configuration parameters)
> throws Exception {
> super.open(parameters);
> firstMapState =
> getRuntimeContext().getMapState(firstMapStateDescriptor);
> secondMapState =
> getRuntimeContext().getMapState(secondMapStateDescriptor);
> }
> @Override
> public void processElement(Tuple2<Integer,
> Long> value, Context ctx, Collector<Object> out) throws Exception {
> Tuple2<Integer, Long> v =
> firstMapState.get(value.f0);
> if (v == null) {
> v = new Tuple2<>(value.f0, 0L);
> }
> System.out.println(value);
> firstMapState.put(value.f0, new
> Tuple2<>(v.f0, v.f1 + value.f1));
> }
> }
> {code}
> This should not be the case, and the job should fail with an adequate message.
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