如果一个或多个服务器无效，则服务器健康指示器将转变为警报状态。
The server health indicator will transit to attention state if one or more servers are invalid. When a server is unavailable the health indicator status is shown as.
其他组件可以监听这个状态属性，当它们链接的组件处于不适当的状态时，它们可以禁用本身，以避免冲突或无效操作。
Other components may be structured so that they can listen to this state and disable themselves when the component they are linked to is in an inappropriate state.
这不仅是一个可以轻松解决的简单问题，而且，当数据源出现延迟或停用时，客户端不会出现没有响应或功能无效的混乱状态。
This is not only an easier problem to solve, but also, in the presence of delay or downtime from the data sources, the client isn't left with an unresponsive or non-functioning mess.
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