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https://issues.apache.org/jira/browse/FLINK-10489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17323459#comment-17323459
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Flink Jira Bot commented on FLINK-10489:
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This issue is assigned but has not received an update in 7 days so it has been
labeled "stale-assigned". If you are still working on the issue, please give an
update and remove the label. If you are no longer working on the issue, please
unassign so someone else may work on it. In 7 days the issue will be
automatically unassigned.
> Inconsistent window information for streams with EventTime characteristic
> -------------------------------------------------------------------------
>
> Key: FLINK-10489
> URL: https://issues.apache.org/jira/browse/FLINK-10489
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / API
> Environment: Flink v1.5.3
> Reporter: Alexis Sarda-Espinosa
> Assignee: TANG Wen-hui
> Priority: Major
> Labels: stale-assigned
>
> Consider the following program.
> {code:java}
> void temp() throws Exception {
> StreamExecutionEnvironment execEnv =
> StreamExecutionEnvironment.getExecutionEnvironment();
> StreamTableEnvironment tableEnv =
> TableEnvironment.getTableEnvironment(execEnv);
> execEnv.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);
> DataStream<Tuple3<Timestamp, String, Double>> source = execEnv
> .fromElements(
> new Tuple3<>(Timestamp.valueOf("2018-09-20 22:00:00"),
> "a", 1.3),
> new Tuple3<>(Timestamp.valueOf("2018-09-20 22:01:00"),
> "a", 2.1),
> new Tuple3<>(Timestamp.valueOf("2018-09-20 22:02:00"),
> "a", 3.0),
> new Tuple3<>(Timestamp.valueOf("2018-09-20 22:00:00"),
> "b", 2.2),
> new Tuple3<>(Timestamp.valueOf("2018-09-20 22:01:00"),
> "b", 1.8)
> )
> .assignTimestampsAndWatermarks(new WaterMarker());
> Table table = tableEnv.fromDataStream(source, "f0, f1, f2,
> rowtime.rowtime")
>
> .window(Slide.over("2.minutes").every("1.minute").on("rowtime").as("w"))
> .groupBy("f1, w")
> .select("f1, w.end - 1.minute, f2.sum");
> tableEnv.toAppendStream(table, Row.class).print();
> execEnv.execute();
> }
> public static class WaterMarker implements
> AssignerWithPunctuatedWatermarks<Tuple3<Timestamp, String, Double>> {
> @Nullable
> @Override
> public Watermark checkAndGetNextWatermark(Tuple3<Timestamp, String,
> Double> lastElement, long extractedTimestamp) {
> return new Watermark(extractedTimestamp);
> }
> @Override
> public long extractTimestamp(Tuple3<Timestamp, String, Double> element,
> long previousElementTimestamp) {
> return element.f0.getTime();
> }
> }
> {code}
> I am seeing an output like the following, where the hour is offset by 2 hours:
> {code:java}
> a,2018-09-20 20:00:00.0,1.3
> a,2018-09-20 20:01:00.0,3.4000000000000004
> a,2018-09-20 20:02:00.0,5.1
> a,2018-09-20 20:03:00.0,3.0
> {code}
> My local time zone is GMT+01:00, and indeed the input timestamps are parsed
> with this time zone, but even if the window-end is printed as GMT, it should
> show 21:0x:00. In my tests, where I actually collect the output and can see
> the actual {{java.sql.Timestamp}} instances, I can always see this extra 1
> hour offset.
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