[jira] [Created] (FLINK-1360) Automatic type extraction for Void is missing

[Shang Yuanchun (Jira)]

Felix Neutatz created FLINK-1360:
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             Summary: Automatic type extraction for Void is missing
                 Key: FLINK-1360
                 URL: https://issues.apache.org/jira/browse/FLINK-1360
             Project: Flink
          Issue Type: Bug
            Reporter: Felix Neutatz
            Priority: Minor


DataSet<Tuple2<Void,Long>> data = env.fromElements(new Tuple2<Void,Long>(null, 1L));
data.print();

throws the following exception:

Exception in thread "main" org.apache.flink.api.common.functions.InvalidTypesException: Automatic type extraction is not possible on candidates with null values. Please specify the types directly.
        at org.apache.flink.api.java.typeutils.TypeExtractor.privateGetForObject(TypeExtractor.java:1174)
        at org.apache.flink.api.java.typeutils.TypeExtractor.getForObject(TypeExtractor.java:1152)
        at org.apache.flink.api.java.ExecutionEnvironment.fromElements(ExecutionEnvironment.java:540)
        at org.apache.flink.hadoopcompatibility.mapreduce.example.ParquetOutput.main(ParquetOutput.java:58)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)





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