Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/2301#discussion_r72416703
--- Diff:
flink-streaming-java/src/main/java/org/apache/flink/streaming/api/operators/AbstractUdfStreamOperator.java
---
@@ -55,13 +56,18 @@
/** the user function */
protected final F userFunction;
+
+ protected EventTimeFunction eventTimeFunction;
/** Flag to prevent duplicate function.close() calls in close() and
dispose() */
private transient boolean functionsClosed = false;
public AbstractUdfStreamOperator(F userFunction) {
this.userFunction = requireNonNull(userFunction);
+ if(userFunction instanceof EventTimeFunction) {
--- End diff --
missing space after if
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