今天重启mysql cluster的管理节点的时候，启动不了，尝试了几次仍然有问题，查看日志，出现如下报错。
2011-04-01 23:49:03 [MgmtSrvr] INFO -- Got initial configuration from '/usr/local/mysql/mysql-cluster/config.ini', will try to set it when all ndb_mgmd(s
) started
2011-04-01 23:49:03 [MgmtSrvr] INFO -- Mgmt server state: nodeid 1 reserved for ip 192.168.100.32, m_reserved_nodes 1.
2011-04-01 23:49:03 [MgmtSrvr] INFO -- Node 1: Node 1 Connected
2011-04-01 23:49:03 [MgmtSrvr] INFO -- Id: 1, Command port: *:1186
2011-04-01 23:49:03 [MgmtSrvr] WARNING -- 1011 Unable to connect with connect string: nodeid=0,localhost:1186
2011-04-01 23:49:03 [MgmtSrvr] ERROR -- Failed to connect to ourself!
很奇怪，这几天一直正常使用，今天一重启就有问题了，问了同事这两天这个服务器做了哪些更改。答曰：
更改了hosts文件。上去一看：发现被更改成：
127.0.0.1 localhost.localdomain openldap
于是更改成默认值
127.0.0.1 localhost.localdomain localhost
重新启动，OK。一切正常！
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