Why there are many 'CLOSE_WAIT' sockets seen in "netstat" command output ?

Issue

• When running netstat command there are many CLOSE_WAIT state sockets.
• These sockets are seen in this state even after the time defined in `net.ipv4.tcp_keepalive_time' more than 2 hours which is the default of TCP connection timeout.

# netstat -a | grep local
       *.local                  *.*              0      0     0      0 LISTEN
hostname.local         hostname.774           5840      0 10124      0 CLOSE_WAIT
hostname.local         hostname.638           5840      0 10124      0 CLOSE_WAIT
hostname.local         hostname.818           5840      0 10124      0 CLOSE_WAIT
hostname.local         hostname.782           5840      0 10124      0 CLOSE_WAIT