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https://issues.apache.org/jira/browse/FLINK-1360?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14266409#comment-14266409
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Felix Neutatz commented on FLINK-1360:
--------------------------------------
No, it gives me another error:
List l = Arrays.asList(new Tuple2<Void,Long>(null, 1L));
TypeInformation t = TypeInfoParser.parse("Tuple2<Void,Long>");
DataSet<Tuple2<Void,Long>> data = env.fromCollection(l, t);
data.print();
Throws:
Exception in thread "main" java.lang.IllegalArgumentException: String could not
be parsed: Class 'Void' could not be found for use as custom object. Please
note that inner classes must be declared static.
at
org.apache.flink.api.java.typeutils.TypeInfoParser.parse(TypeInfoParser.java:90)
at
org.apache.flink.hadoopcompatibility.mapreduce.example.ParquetOutput.main(ParquetOutput.java:92)
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)
Caused by: java.lang.IllegalArgumentException: Class 'Void' could not be found
for use as custom object. Please note that inner classes must be declared
static.
at
org.apache.flink.api.java.typeutils.TypeInfoParser.parse(TypeInfoParser.java:290)
at
org.apache.flink.api.java.typeutils.TypeInfoParser.parse(TypeInfoParser.java:133)
at
org.apache.flink.api.java.typeutils.TypeInfoParser.parse(TypeInfoParser.java:88)
... 6 more
> 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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