HMmaster启动失败（报错：java.net.ConnectException: Call From master/192.168.44.130 to master:8020 failed on）

将hbase-site.xml中的配置项中的

     hbase.rootdir 
     hdfs://localhost:8020/hbase 
 
改为：

     hbase.rootdir 
     hdfs://localhost:9000/hbase 
 

因为在core-site.xml中hdfs在运行的端口号为9000 <
property> 
     fs.defaultFS 
     hdfs://master:9000

报错内容：java.net.ConnectException: Call From master/192.168.44.130 to master:8020 failed on connection exception: java.net.ConnectException: Connection refused;