因mapjoin加载内存溢出而导致return code 3
问题描述：
例行Hive作业报错
日志定位：
Starting to launch local task to process map join; maximum memory = 5172101120
2023-10-16 07:56:51,530\] - INFO: \[HIVE\] 2023-10-16 07:56:51 **Processing rows: 6200000 Hashtable size: 6199999 Memory usage: 2857332576 percentage: 0.552** \[2023-10-16 07:56:52,722\] - INFO: \[HIVE\] Execution failed with exit status: 3 \[2023-10-16 07:56:52,724\] - INFO: \[HIVE\] FAILED: Execution Error, return code 3 from org.apache.hadoop.hive.ql.exec.mr.MapredLocalTask 问题解决： 可以看到在执行mapjoin的时候出现了内存报错，由于最大内存值为5172101120，而进度55.2%的时候已经使用了2857332576，由于2857332576/0.552 = 5176327130 \> 5172101120，所以报错return code 3。