Github user twalthr commented on the issue:
https://github.com/apache/flink/pull/2938
Here is an example to reproduce the wrong results:
```scala
@Test
def testEventTimeTumblingWindowStream(): Unit = {
val env = StreamExecutionEnvironment.getExecutionEnvironment
env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime)
val tEnv = TableEnvironment.getTableEnvironment(env)
val stream = env
.fromCollection(data)
.assignTimestampsAndWatermarks(new TimestampWithEqualWatermark())
val table = stream.toTable(tEnv, 'long, 'int, 'string)
val windowedTable = table
.groupBy('string)
.window(Tumble over 5.milli on 'rowtime as 'w)
.select('string, 'int.count, 'int.avg, 'w.start, 'w.end)
val results = windowedTable.toDataStream[Row].print()
env.execute()
}
@Test
def testEventTimeTumblingWindowBatch(): Unit = {
val env = ExecutionEnvironment.getExecutionEnvironment
val tEnv = TableEnvironment.getTableEnvironment(env)
val stream = env
.fromCollection(data)
val table = stream.toTable(tEnv, 'long, 'int, 'string)
val windowedTable = table
.groupBy('string)
.window(Tumble over 5.milli on 'long as 'w)
.select('string, 'int.count, 'int.avg, 'w.start, 'w.end)
val results = windowedTable.toDataSet[Row].print()
}
```
It should be:
```
Hello world,1,3,1970-01-01 00:00:00.005,1970-01-01 00:00:00.01
Hello,2,2,1970-01-01 00:00:00.0,1970-01-01 00:00:00.005
Hello world,1,3,1970-01-01 00:00:00.015,1970-01-01 00:00:00.02
Hi,1,1,1970-01-01 00:00:00.0,1970-01-01 00:00:00.005
```
But is:
```
Hello,2,2,1970-01-01 00:00:00.0,1970-01-01 00:00:00.005
Hello world,2,3,1970-01-01 00:00:00.0,1970-01-01 00:00:00.005
Hi,1,1,1970-01-01 00:00:00.0,1970-01-01 00:00:00.005
```
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