Call From hdp-05/192.168.230.15 to hdp-01:10020 failed on connection exception: java.net.ConnectException:
拒绝连接; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused 错误原因没有启动hadoop的history程序
JobHistoryServer进程监听端口就是10020 解决:
mr-jobhistory-daemon.sh start historyserver
jps 出现JobHistoryServer
确定服务已经启动
呐