一、异常现象
启动hbase之后，抛出异常，异常信息如下：
master.HMaster: Failed to become active master
hbase java.net.ConnectException: Call From to 9000 failed on connection exception: java.net.ConnectException: Connection refused;master.HM
阅读背景：
hbase_异常_01_Hbase: Failed to become active master
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