hbase分布式部署问题之org.apache.hadoop.hbase.regionserver.HRegionServer: Unable to connect to master

在配置好hbase分布式后，并且通过start-hbase.sh启动了master，zookeeper，regionserver后，通过master.host:60010 web界面查看时，在regionservers栏下没有任何regionserver信息；查看regionserver上的日志，看到以下异常:

2012-09-25 18:25:11,902 WARN org.apache.hadoop.hbase.regionserver.HRegionServer: Unable to connect to master. Retrying. Error was:
java.net.ConnectException: Connection refused
        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
        at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:574)
        at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
        at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:489)
        at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.setupConnection(HBaseClient.java:328)
        at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.setupIOstreams(HBaseClient.java:362)
        at org.apache.hadoop.hbase.ipc.HBaseClient.getConnection(HBaseClient.java:1046)
        at org.apache.hadoop.hbase.ipc.HBaseClient.call(HBaseClient.java:898)
        at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Invoker.invoke(WritableRpcEngine.java:150)
        at $Proxy8.getProtocolVersion(Unknown Source)
        at org.apache.hadoop.hbase.ipc.WritableRpcEngine.getProxy(WritableRpcEngine.java:183)
        at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:335)
        at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:312)
        at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:364)
        at org.apache.hadoop.hbase.ipc.HBaseRPC.waitForProxy(HBaseRPC.java:236)
        at org.apache.hadoop.hbase.regionserver.HRegionServer.getMaster(HRegionServer.java:1808)
        at org.apache.hadoop.hbase.regionserver.HRegionServer.reportForDuty(HRegionServer.java:1854)
        at org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:671)
        at java.lang.Thread.run(Thread.java:619)

解决方法:

redhat 操作系统下，在master主机上，通过hostname设置为regionserver端链接时指定的hostname即可