weixin_39198774的博客

0xx01 概述 hive的udaf全称 User-Defined Aggregation Functions。hive有两种udaf，simple and generic.区别如下 Simple UDAFs, as the name implies, are rather simple to write, but incur performance penalties because of th...

今天进行ods层表向dwd层表数据导入的时候报了这个错 2019-03-14 10:01:23,403 FATAL [IPC Server handler 7 on 11474] org.apache.hadoop.mapred.TaskAttemptListenerImpl: Task: attempt_1550917126723_7329_m_000006_0 - exited : jav...