hive overwrite 卡住不动

错误

Ended Job = job_1545829388777_0070 with errors
Error during job, obtaining debugging information...
FAILED: Execution Error, return code 2 from org.apache.hadoop.hive.ql.exec.mr.MapRedTask
MapReduce Jobs Launched: 
Stage-Stage-1:  HDFS Read: 0 HDFS Write: 0 FAIL
Total MapReduce CPU Time Spent: 0 msec

失败原因
经查发现发现/tmp/hadoop/.log提示java.lang.OutOfMemoryError: Java heap space，原因是namenode内存空间不够，jvm不够新job启动导致。

解决方法
将你的hive可以设置成本地模式来执行任务试试：

set hive.exec.mode.local.auto=true;