Uploaded image for project: 'Flink'
  1. Flink
  2. FLINK-6368

Grouping keys in stream aggregations have wrong order

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.3.0
    • Component/s: Table API & SQL
    • Labels:
      None

      Description

      FLINK-5768 removed the `AggregateUtil.createPrepareMapFunction` stage. It seems that the order of grouping keys is sometimes messed up. The following tests fails:

        @Test
        def testEventTimeSlidingGroupWindow(): Unit = {
          val env = StreamExecutionEnvironment.getExecutionEnvironment
          env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime)
          val tEnv = TableEnvironment.getTableEnvironment(env)
          StreamITCase.testResults = mutable.MutableList()
      
          val stream = env
            .fromCollection(data)
            .assignTimestampsAndWatermarks(new TimestampWithEqualWatermark())
            .map(t => (t._2, t._6))
          val table = stream.toTable(tEnv, 'int, 'string)
      
          val windowedTable = table
            .window(Slide over 10.milli every 5.milli on 'rowtime as 'w)
            .groupBy('w, 'string)
            .select('string, 'int.count, 'w.start, 'w.end)
      
          val results = windowedTable.toDataStream[Row]
          results.addSink(new StreamITCase.StringSink)
          env.execute()
        }
      

      Exception:

      Caused by: java.lang.RuntimeException: Could not forward element to next operator
      	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.pushToOperator(OperatorChain.java:532)
      	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:505)
      	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:485)
      	at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:871)
      	at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:849)
      	at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
      	at org.apache.flink.table.runtime.aggregate.TimeWindowPropertyCollector.collect(TimeWindowPropertyCollector.scala:50)
      	at org.apache.flink.table.runtime.aggregate.TimeWindowPropertyCollector.collect(TimeWindowPropertyCollector.scala:29)
      	at org.apache.flink.table.runtime.aggregate.IncrementalAggregateWindowFunction.apply(IncrementalAggregateWindowFunction.scala:74)
      	at org.apache.flink.table.runtime.aggregate.IncrementalAggregateTimeWindowFunction.apply(IncrementalAggregateTimeWindowFunction.scala:64)
      	at org.apache.flink.table.runtime.aggregate.IncrementalAggregateTimeWindowFunction.apply(IncrementalAggregateTimeWindowFunction.scala:35)
      	at org.apache.flink.streaming.runtime.operators.windowing.functions.InternalSingleValueWindowFunction.process(InternalSingleValueWindowFunction.java:45)
      	at org.apache.flink.streaming.runtime.operators.windowing.WindowOperator.emitWindowContents(WindowOperator.java:598)
      	at org.apache.flink.streaming.runtime.operators.windowing.WindowOperator.onEventTime(WindowOperator.java:505)
      	at org.apache.flink.streaming.api.operators.HeapInternalTimerService.advanceWatermark(HeapInternalTimerService.java:276)
      	at org.apache.flink.streaming.api.operators.InternalTimeServiceManager.advanceWatermark(InternalTimeServiceManager.java:119)
      	at org.apache.flink.streaming.api.operators.AbstractStreamOperator.processWatermark(AbstractStreamOperator.java:940)
      	at org.apache.flink.streaming.runtime.io.StreamInputProcessor$ForwardingValveOutputHandler.handleWatermark(StreamInputProcessor.java:288)
      	... 7 more
      Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String
      

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                xccui Xingcan Cui
                Reporter:
                twalthr Timo Walther
              • Votes:
                0 Vote for this issue
                Watchers:
                3 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: