Question

我正在尝试将ContinuousTimeEventTrigger与timeWindow一起使用：

val timed_stamped_stream = likes_stream.map({
  p => {
    val x = p.split(",")
    (get_timestamp(x(0)), x(1).trim.toLong, x(2).trim.toLong)
  }}).assignTimestamps(new TimestampExtractor[(Long, Long, Long)] {
  override def getCurrentWatermark: Long = Long.MinValue
  override def extractWatermark(t: (Long, Long, Long), l: Long): Long = t._1
  override def extractTimestamp(t: (Long, Long, Long), l: Long): Long = t._1
}).keyBy(2).timeWindow(Time.of(5, TimeUnit.SECONDS))


timed_stamped_stream.trigger(ContinuousEventTimeTrigger.of(Time.of(5, TimeUnit.SECONDS))).sum(1).print()

但是我在flink流集群上执行java.lang.StackOverflowError时会遇到以下stackTrace：

java.lang.StackOverflowError
at java.util.HashMap.putVal(HashMap.java:628)
at java.util.HashMap.put(HashMap.java:611)
at java.util.HashSet.add(HashSet.java:219)
at org.apache.flink.streaming.runtime.operators.windowing.WindowOperator$Context.registerEventTimeTimer(WindowOperator.java:532)
at org.apache.flink.streaming.api.windowing.triggers.ContinuousEventTimeTrigger.onEventTime(ContinuousEventTimeTrigger.java:61)
at org.apache.flink.streaming.runtime.operators.windowing.WindowOperator$Context.onEventTime(WindowOperator.java:558)
at org.apache.flink.streaming.runtime.operators.windowing.WindowOperator$Context.onEventTime(WindowOperator.java:562)
at org.apache.flink.streaming.runtime.operators.windowing.WindowOperator$Context.onEventTime(WindowOperator.java:562)
at org.apache.flink.streaming.runtime.operators.windowing.WindowOperator$Context.onEventTime(WindowOperator.java:562)
at org.apache.flink.streaming.runtime.operators.windowing.WindowOperator$Context.onEventTime(WindowOperator.java:562)
at org.apache.flink.streaming.runtime.operators.windowing.WindowOperator$Context.onEventTime(WindowOperator.java:562)
at org.apache.flink.streaming.runtime.operators.windowing.WindowOperator$Context.onEventTime(WindowOperator.java:562)

有谁可以提供帮助吗？

Apache Flink：Streaming Window触发器，java.lang.StackOverflowException

0 个答案: