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select * from table hive select * from t limit 1; 直接执行FetchTask Hive中有各种各样的Task任务,其中FetchTask算是最简单的一种了。FetchTask不同于MapReduce任务,它不会启动mapreduce,而是直接读取文件,输出结果。当你执行简单的select * with limit语句的时候,其不会运行mapred ...
Async loop died! 重启任务后发现任务一直异常,日志中有大量reconnect。 b.s.m.n.Client Reconnect started for Netty-Client-192.168.1.2/192.168.1.21:6724... telnet到对应级机器的6724端口,连接不上,登陆机器检测端口,发现端口没有正常关闭,重启使用此端口job,之后恢复正常。
openstack juno安装网络节点第三块网卡配置的疑问,目前对这个的作用还不太明确: # The external network interface auto INTERFACE_NAME iface INTERFACE_NAME inet manual up ip link set dev $IFACE up down ip link set dev $IFACE down 据了解 ...