启动Hadoop集群测试MapReduce作业的时候,在linux终端执行以下命令
hadoop jar wc.jar com.jamie.cluster.WordcountDriver /wcinput/word.txt /wcoutput
然后报错显示: INFO retry.RetryInvocationHandler: java.net.ConnectException: Call From hadoop102/192.168.88.102 to hadoop103:8032 failed on connection exception: java.net.ConnectException: 拒绝连接; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused, while invoking ApplicationClientProtocolPBClientImpl.getNewApplication over null after 2 failover attempts. Trying to failover after sleeping for 20185ms.
检查每台VM的进程,发现配置resource manager的Hadoop103节点对应的yarn没有启动。
切换到Hadoop103 VM,执行 start-yarn.sh,查看进程已经有resource manager: 再次测试通过:
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