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我已經使用try catch作爲我的mapreduce代碼的一部分。我在下面的代碼中基於COUNT減少了我的值。我我如何終止使用該代碼的工作在以下終止scala程序?
class RepReducer extends Reducer[NullWritable, Text, Text, IntWritable] {
override def reduce(key: NullWritable, values: Iterable[Text], context: Reducer[NullWritable, Text, Text, IntWritable]#Context): Unit = {
val count = values.toList.length
if (count == 0){
try {
context.write(new Text("Number of tables with less than 40% coverage"), new IntWritable(count))
} catch {
case e: Exception =>
Console.err.println(" ")
e.printStackTrace()
}
}
else
{
System.out.println("terminate job") //here i want to terminate if count is not equal to 0
}
}
}
'sys.exit()' http://www.scala-lang.org/api/current/index.html#[email protected](status:Int):Nothing – lea 2014-10-29 15:05:18
'sys.exit ()',雖然技術上這個問題的答案很少是正確的行爲。也許在Hadoop中,但我認爲我們需要更多的細節來弄清楚這是否是XY問題。 – 2014-10-29 15:13:23