zhaijp opened a new pull request #7596: Release 1.7 sortPartition bug URL: https://github.com/apache/flink/pull/7596 ### I found a bug when I use sortPartition public class WordCountExample { public static void main(String[] args) throws Exception { final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment(); DataSet<String> text = env.fromElements("a b b b b c c"); DataSet<Tuple2<String,Integer>> wordCounts = text.flatMap(new LineSPlitter()) .groupBy(0) .sum(1) .sortPartition(1, Order.DESCENDING); wordCounts.print(); } } class LineSPlitter implements FlatMapFunction<String, Tuple2<String,Integer>>{ @Override public void flatMap(String line, Collector<Tuple2<String, Integer>> out) throws Exception { for(String word : line.split(" ")) { out.collect(new Tuple2<String, Integer>(word,1)); } } } ### the console show this: (a,1) (b,4) (c,2) ### when i change the elements aa bb bb bb bb cc cc the result is right： (bb,4) (cc,2) (aa,1)
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