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このコードは正常に動作します:参照方法はApache Flink 1.0.0でサポートされていますか?
.keyBy(value -> value.getSessionUid())
が、この
.keyBy(LogItem::getSessionUid)
スロー例外:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: -1
at org.apache.flink.api.java.typeutils.TypeExtractor.getUnaryOperatorReturnType(TypeExtractor.java:294)
at org.apache.flink.api.java.typeutils.TypeExtractor.getKeySelectorTypes(TypeExtractor.java:253)
at org.apache.flink.api.java.typeutils.TypeExtractor.getKeySelectorTypes(TypeExtractor.java:246)
at org.apache.flink.streaming.api.datastream.KeyedStream.<init>(KeyedStream.java:87)
at org.apache.flink.streaming.api.datastream.DataStream.keyBy(DataStream.java:241)
at streamer_sessions_aggregator.StreamerSessionAggregator.runFlow(StreamerSessionAggregator.java:40)
at streamer_sessions_aggregator.Main.main(Main.java:10)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
私は、Apache FLINKの1.0.0は、現在の参照方法をサポートしていません理解しています。右?