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Fabian Hueske commented on FLINK-5888: -------------------------------------- Yes, that was expected since the partitioning was moved between the maps as [~ggevay] pointed out. I think there is an actual problem in the optimizer. Thanks for reporting this issue! > ForwardedFields annotation is not generating optimised execution plan in > example KMeans job > ------------------------------------------------------------------------------------------- > > Key: FLINK-5888 > URL: https://issues.apache.org/jira/browse/FLINK-5888 > Project: Flink > Issue Type: Bug > Components: DataSet API, Examples, Java API > Affects Versions: 1.1.3 > Reporter: Ziyad Muhammed Mohiyudheen > > Flink KMeans java example [1] shows the usage of ForwardedFields function > annotation. How ever, the example job was taking more time than expected on > medium sized data itself. By merely removing the function annotation from the > example code (with out any other change), a better execution plan and run > time was obtained. The execution plan shows that no combiner is used and the > two Map tasks are not chained when ForwardedFields is enabled. The experiment > is documented in [2] > [1] > https://github.com/apache/flink/blob/master/flink-examples/flink-examples-batch/src/main/java/org/apache/flink/examples/java/clustering/KMeans.java > [2] https://drive.google.com/open?id=0B0IlZv0uHBuvVEZ5ZmNpN19jVVU -- This message was sent by Atlassian JIRA (v6.3.15#6346)