推拉窗我用这个代码来执行我的测试(Flink Quick Start): val text = env.socketTextStream("localhost", port, '\n')
// parse the data, group it, window it, and aggregate the counts
val windowCounts = text
我正尝试使用flink从kafka流式传输数据。我的代码在编译时没有错误,但运行出现以下错误: Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.NoClassDefFoundError:
org/apach
我想获得多个字段的总和。我用这个代码来解释我的痛苦: // parse the data, group it, window it, and aggregate the counts
val windowCounts = text
.flatMap { w => w.split("\\s") }
.map { w => WordWithCount(w, 1, 2) }
Apache Flink有可能在运行时动态添加新数据流而不重新启动作业吗? 据我了解,通常弗林克程序是这样的: val env = StreamExecutionEnvironment.getExecutionEnvironment()
val text = env.socketTextStream(hostname, port, "\n")
val windowCounts = text.m