java.util.concurrent.TimeoutException

[HbnKing]

java.util.concurrent.TimeoutException: Futures timed out after [10 seconds]
	at scala.concurrent.impl.Promise$DefaultPromise.ready(Promise.scala:223)
	at scala.concurrent.impl.Promise$DefaultPromise.result(Promise.scala:227)
	at scala.concurrent.Await$$anonfun$result$1.apply(package.scala:190)
	at scala.concurrent.BlockContext$DefaultBlockContext$.blockOn(BlockContext.scala:53)
	at scala.concurrent.Await$.result(package.scala:190)
	at Helpers$ImplicitObservable$class.results(Helpers.scala:30)
	at Helpers$GenericObservable.results(Helpers.scala:22)
	at Start$.insertMany(Start.scala:84)
	at Start$$anonfun$main$1$$anonfun$apply$1.apply(Start.scala:61)
	at Start$$anonfun$main$1$$anonfun$apply$1.apply(Start.scala:56)
	at scala.collection.Iterator$class.foreach(Iterator.scala:891)
	at scala.collection.AbstractIterator.foreach(Iterator.scala:1334)
	at Start$$anonfun$main$1.apply(Start.scala:56)
	at Start$$anonfun$main$1.apply(Start.scala:52)
	at org.apache.spark.rdd.RDD$$anonfun$foreachPartition$1$$anonfun$apply$29.apply(RDD.scala:929)
	at org.apache.spark.rdd.RDD$$anonfun$foreachPartition$1$$anonfun$apply$29.apply(RDD.scala:929)
	at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:2067)
	at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:2067)
	at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:87)
	at org.apache.spark.scheduler.Task.run(Task.scala:109)
	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:345)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

spark 项目 运行过程中使用到了 list 但是 这里报错了 。记录一下
查看sof 相关连接 (links)[https://stackoverflow.com/questions/41123846/why-does-join-fail-with-java-util-concurrent-timeoutexception-futures-timed-ou]