Github user aljoscha commented on a diff in the pull request:
https://github.com/apache/flink/pull/879#discussion_r33688371
--- Diff:
flink-core/src/main/java/org/apache/flink/api/common/ExecutionConfig.java ---
@@ -141,6 +144,25 @@ public boolean isClosureCleanerEnabled() {
}
/**
+ * Sets the interval of the automatic watermark emission. Watermaks are
used throughout
+ * the streaming system to keep track of the progress of time. They are
used, for example,
+ * for time based windowing.
+ */
+ public ExecutionConfig setAutoWatermarkInterval(Duration interval) {
--- End diff --
I think it doesn't make sense right now to add documentation for this
without a document that describes the broad concepts in Streaming. This touches
on a lot of stuff such as event-time vs processing-time, windowing semantics
and so on. I think @StephanEwen started the discussion on such a document
somewhere.
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