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Konstantin Knauf updated FLINK-12044: ------------------------------------- Labels: (was: auto-closed) Priority: Not a Priority (was: Minor) > Flink CEP discards events as late if they have timestamps <= 0 > -------------------------------------------------------------- > > Key: FLINK-12044 > URL: https://issues.apache.org/jira/browse/FLINK-12044 > Project: Flink > Issue Type: Bug > Components: Library / CEP > Affects Versions: 1.7.2 > Reporter: Arseniy Tashoyan > Priority: Not a Priority > > Let's make an input stream like this: > {code:scala} > env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime) > val events = env.fromElements( > Event(timestamp = 0L, siteId), > Event(timestamp = 500L, siteId) > ) > .assignTimestampsAndWatermarks(new > BoundedOutOfOrdernessTimestampExtractor{...}) > {code} > For this stream the event with timestamp = 0L will be treated as late. The > reason is AbstractKeyedCEPPatternOperator that initializes lastWatermark with > the default value provided by the compiler: zero. Would it be more correct to > initialize lastWatermark with Long.MIN_VALUE? > Of course, this is not a blocking defect, but I had really hard times to find > why my unit test disregards the first event. Strictly speaking, this behavior > seems incorrect. -- This message was sent by Atlassian Jira (v8.3.4#803005)