Branch 4.2

[lklong]

hi oozie team! i got a promble , when i use oozie lanuch a spark job in yarn-cluster mode, i found two jobs running,one is MR of Map-only,the other is the real spark-job,but sometimes i found the spark-job run failed but oozie tell me the job completed successefully.what is the reason of this problem???? please help me!