Github user GJL commented on a diff in the pull request:
https://github.com/apache/flink/pull/4896#discussion_r158259995
--- Diff:
flink-examples/flink-examples-streaming/src/main/java/org/apache/flink/streaming/examples/windowing/TopSpeedWindowing.java
---
@@ -55,6 +55,7 @@ public static void main(String[] args) throws Exception {
final StreamExecutionEnvironment env =
StreamExecutionEnvironment.getExecutionEnvironment();
env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);
env.getConfig().setGlobalJobParameters(params);
+ env.setParallelism(1);
--- End diff --
Is this strictly needed? It's not a Unit or ITCase and the example seems to
work without this line.
---
