Hi Team,
Problem Description : When I was calling *reduce()* method on keyedStream
object then getting Ecxeption as
"* org.apache.flink.api.common.InvalidProgramException: Specifying keys via
field positions is only valid for tuple data types. Type: Integer*".
StreamExecutionEnvironment env =
StreamExecutionEnvironment.getExecutionEnvironment();
KeyedStream integers4 = env.fromElements(1,2,3).keyBy(0);
DataStream doubleIntegers4 = integers4.reduce(new
ReduceFunction<Integer>() {
@Override
public Integer reduce(Integer arg0, Integer arg1) throws Exception {
return arg0 + arg1;
}
});
can you please tell me how to solve this exception? or can you provide any
link or example where I get these complete Solution..
your help will be appreciated..
Thanks & Regards
*Jitendra Agrawal *
Mumbai
9167539602
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