hi all:
I am using apache-tomcat-7.0.32, the use of websocket to make a chat, I 
encountered a problem, when three people at the same time online chat, when 
suddenly a man unplug cable out of chat, server is unable to determine the 
connection is disconnected, how the server know unplugged network line of human 
connection state? Can you help me? Thank you very much!

      Best Regards,
 Yin zhang

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