Call From hadoop102/192.168.121.102 to hadoop102:9000 failed on connection exception
问题截图
问题描述
在测试Spark中examples案例时,出现Call From hadoop102/192.168.121.102 to hadoop102:9000 failed on connection exception: java.net.ConnectException: 拒绝连接的错误。
问题原因
hadoop集群没有开启
解决办法
打开hadoop集群
[root@hadoop102 hadoop-2.7.2]# sbin/start-all.sh
结果截图
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