Redmine2.2.0啓動報mysql鏈接錯誤

在虛擬機CentOS 5裝了個dotProject後，又裝了個redmine2.2.0,啓動時發現前幾天正常運行的Redmine啓動不了了，控制檯輸出錯誤信息以下：php => Booting WEBrick => Rails 3.2.9 application starting in production on http://0.0.0.0:3000 => Call with -d to det

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