Hey all, on the current master running the WordCount example with a text file input/output results and a manual reduce function (instead of the sum(1)) results in a combiner, which is not chained.
The corresponding issue is here: https://issues.apache.org/jira/browse/FLINK-2246 Can someone please confirm this? If it is an issue, we should fix it soon. The serialization overhead is noticeable on larger inputs. – Ufuk
