任何人都可以解释我的Apache Spark Error SparkException：由于阶段失败而导致作业中止

I have simple Apache Spark App where I read files from hdfs and after that i pipe it to external process. When I read a big amount a data (in my case files have about 241MB) and i don't specify min number of partitions or specify min number to 4 i'm getting following error:I have simple Apache Spark App where I read fil