用eclipse远程提交mr到hadoop集群后，mr卡住后一直不执行，在控制台查日志发现错误如下：
org.apache.hadoop.ipc.Client: Retrying connect to server:127.0.0.1:8030. Already tried 0time(s).org.apache.hadoop.ipc.Client: Retrying connect to server:127.0.0.1:8030. Already tried 1time(s).org.apache.hadoop.ipc.Client: Retrying connect to server:127.0.0.1:8030. Already tried 2time(s).
果断把跟8030有关的端口配置到Configuration 里，问题解决，Configuration配置如下：
?Configuration conf = new Configuration();
?conf.set("fs.defaultFS", "hdfs://master190:9000/");
?conf.set("mapreduce.framework.name", "yarn");
?conf.set("yarn.resourcemanager.address", "master190:8032");
?conf.set("yarn.resourcemanager.scheduler.address", "master190:8030");
?conf.set("hbase.zookeeper.quorum", "master190,slave191,slave192,slave193");?? ??
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注：错误原因是没有配置红色部分
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