Greg Hogan created FLINK-5890:
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Summary: GatherSumApply broken when object reuse enabled
Key: FLINK-5890
URL: https://issues.apache.org/jira/browse/FLINK-5890
Project: Flink
Issue Type: Bug
Components: Gelly
Affects Versions: 1.3.0
Reporter: Greg Hogan
Assignee: Greg Hogan
Fix For: 1.3.0
{{GatherSumApplyIteration.SumUdf.reduce}} can store a value from {{arg1}} in
the new {{Tuple2}} which can be overwritten in {{ReduceDriver}}. We need to
swap {{arg0.f1}} and {{arg1.f1}} when this happens (as done in {{ReduceDriver}}
for the returned results).
{code}
@Override
public Tuple2<K, M> reduce(Tuple2<K, M> arg0, Tuple2<K, M> arg1) throws
Exception {
K key = arg0.f0;
M result = this.sumFunction.sum(arg0.f1, arg1.f1);
return new Tuple2<>(key, result);
}
{code}
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