TIME_WAIT is perfectly normal for the socket shutdown.

<http://www.samag.com/documents/s=1323/sam0110e/0110e.htm>

"To address the problem, I had to understand what happens when a TCP connection is closed. Figure 1 illustrates these steps. After the Web server returns the requested Web page to a browser, it sends a connection termination request (FIN) to indicate that its end of the connection has been closed. When the browser acknowledges (ACK) the Web server's FIN, the Web server enters FIN_WAIT_2 state. The browser then sends a connection termination request (FIN) to the Web server indicating that it has closed its end of the connection. The Web server acknowledges (ACK) the browser's FIN. The Web server enters TIME_WAIT state and stays that way for time_wait interval. During this period, the kernel data structure resources associated with the TCP connection remain assigned. This is done in case any straggling packets are lingering on the network."