嗨，我正在通过shell脚本运行sparkr progrm。我将输入文件指向local意味着它工作正常，但当我指向hdfs意味着它抛出错误。

Exception in thread "delete Spark local dirs" java.lang.NullPointerException

Exception in thread "delete Spark local dirs" java.lang.NullPointerException
at  org.apache.spark.storage.DiskBlockManager.org$apache$spark$storage$DiskBlockManager$$doStop(DiskBlockManager.scala:161)
at  org.apache.spark.storage.DiskBlockManager$$anon$1$$anonfun$run$1.apply$mcV$sp(DiskBlockManager.scala:141)
at org.apache.spark.storage.DiskBlockManager$$anon$1$$anonfun$run$1.apply(DiskBlockManager.scala:139)
at org.apache.spark.storage.DiskBlockManager$$anon$1$$anonfun$run$1.apply(DiskBlockManager.scala:139)
at org.apache.spark.util.Utils$.logUncaughtExceptions(Utils.scala:1617)
at org.apache.spark.storage.DiskBlockManager$$anon$1.run(DiskBlockManager.scala:139)

任何帮助都将不胜感激。