This could be a myriad of things and it is impossible to tell from just that trace. A few possibilities include the remote host could have been shutdown, the program on the host could have been shut down, a proxy could have shut it down, etc.
Do you have access to the remote host? If you do perhaps you can view some log files from the application on that end? Hope that helps.
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这可能是无数的事情，仅凭那条痕迹是不可能分辨出来的。几种可能性包括远程主机可能已关闭、主机上的程序可能已关闭、代理可能已将其关闭等。
您是否有权访问远程主机？如果您这样做，也许您可以从应用程序中查看一些日志文件？希望有帮助。
This could be a myriad of things and it is impossible to tell from just that trace. A few possibilities include the remote host could have been shutdown, the program on the host could have been shut down, a proxy could have shut it down, etc.
Do you have access to the remote host? If you do perhaps you can view some log files from the application on that end? Hope that helps.