异常log：
Caused by: java.sql.SQLException: org.apache.spark.SparkException: Job aborted due to stage failure: Task 799 in stage 9537.0 failed 4 times, most recent failure: Lost task 799.3 in stage 9537.0 (TID 14699170, node37.tj.leap.com): java.io.IOException:
No space left on device
解决方案：
1.将yarn产生的usercache目录删除，临时得以解决
2.没有从根本上解决问题，数据量太大，空间太小了，下次还会发生类似问题，扩展集群，再做balance才能从根本上解决问题
