Call From hdp 1/192.168.234.129 to hdp 1:8020 failed on connection exception: ja

分享一个我大晚上提交Hadoop作业到Yarn上因为一个小小小小错误解决了一晚上的问题! 报错:Exception in thread “main” java.net.ConnectException: Call From hdp-1/192.168.234.129 to hdp-1:8020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused 2