我正在使用火花 2.0.0。有没有办法将参数从火花驱动程序传递给执行程序?我尝试了以下。
class SparkDriver {
public static void main(String argv[]){
SparkConf conf = new SparkConf().setAppName("test").setMaster("yarn");
SparkSession sparkSession = SparkSession.builder().config(conf).getOrCreate();
Dataset<Row> input = sparkSession.read().load("inputfilepath");
Dataset<Row> modifiedinput = input.mapPartitions(new customMapPartition(5),Encoders.bean(Row.class));
}
class customMapPartition implements MapPartitionsFunction{
private static final long serialVersionUID = -6513655566985939627L;
private static Integer variableThatHastobePassed = null;
public customMapPartition(Integer passedInteger){
customMapPartition.variableThatHastobePassed= passedInteger;
}
@Override
public Iterator<Row> call(Iterator<Row> input) throws Exception {
System.out.println("number that is passed " + variableThatHastobePassed);
}
}
如上所述,我编写了一个自定义 mappartitionfunction 来传递参数。并在 partitionfunction 的调用方法中访问静态变量。这在我使用“setmaster(”local”)在本地运行时有效。但在使用 .setmaster(“yarn”)的集群上运行时不起作用。(在 system.out.println 语句中打印为 null)
有没有办法将参数从驱动程序传递给执行程序。