hive 插入数据的时候，不能直接运行，报错FAILED: Execution Error, return code 2 from org.apache.hadoop.hive.ql.exec.mr.

hive 插入数据的时候，不能直接运行，报错

错误原因：

namenode内存空间不够，JVM剩余内存空间不够新job运行所致

错误提示

Starting Job = job_1594085668614_0006, Tracking URL = http://kudu:8088/proxy/application_1594085668614_0006/
Kill Command = /root/soft/hadoop-3.2.1/bin/mapred job  -kill job_1594085668614_0006
Hadoop job information for Stage-1: number of mappers: 0; number of reducers: 0
2020-07-07 09:43:24,559 Stage-1 map = 0%,  reduce = 0%
Ended Job = job_1594085668614_0006 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

解决办法：

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