与同步调用类似，InvalidSymbolException指示请求已到达服务提供程序，该提供程序抛出业务异常，指示符号无效。
Similar to a synchronous invocation, InvalidSymbolException indicates that the request has reached the service provider, which has thrown a business exception stating that the symbol is invalid.
当它到达Web服务网关时，摘取出这个令牌符号，并且继续路由这个请求。
Extract the token and route the request when it arrives at the Web Services Gateway.
当它到达Web服务网关时，摘取出这个令牌符号，并且继续路由这个请求。
Extract the token and route the request when it arrives at the Web Services Gateway.
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