执行HQL直接被退出：Remote side unexpectedly closed network connection

执行HQL直接被退出：Remote side unexpectedly closed network connection

• ＨQL语句
• 执行情况描述
• 原因
• 正确HQL

ＨQL语句

select city,layer, avg(total/size) from 
(
select city,houseinfo[0] layer,substring(houseinfo[4],0,length(houseinfo[4])-2) as size, 
total from tb_ke_house 
) t
group by city,layer;

执行情况描述

执行上述HQL，当执行到Map阶段时候，直接退出了当前执行语句，hdfs集群页一并被强制停止了。

原因

隐式转换带来的问题，修改HQL语句将size在子查询中做cast强制转换

正确HQL

select city,layer, avg(total/size) from 
(
select city,houseinfo[0] layer,cast(substring(houseinfo[4],0,length(houseinfo[4])-2) as int) as size, 
total from tb_ke_house 
) t
group by city,layer;

结束！