What is Close_wait socket?
CLOSE_WAIT – Indicates that the server has received the first FIN signal from the client and the connection is in the process of being closed. This means the socket is waiting for the application to execute close() . A socket can be in CLOSE_WAIT state indefinitely until the application closes it.
What does Close_wait mean in netstat?
CLOSE_WAIT means your program is still running, and hasn’t closed the socket (and the kernel is waiting for it to do so). Add -p to netstat to get the pid, and then kill it more forcefully (with SIGKILL if needed). That should get rid of your CLOSE_WAIT sockets.
What does FIN_WAIT_1 mean?
FIN_WAIT_2 seems to occur when the server has an active connection with a client and wants to shut down the TCP connection (probably in response to a normal application layer “exit”). The server sends the client a packet with a “FIN” bit set. At this point, the server is in FIN_WAIT_1 state.
How to get rid of close wait socket?
CLOSE_WAIT means your program is still running, and hasn’t closed the socket (and the kernel is waiting for it to do so). Add -p to netstat to get the pid, and then kill it more forcefully (with SIGKILL if needed). That should get rid of your CLOSE_WAIT sockets. You can also use ps to find the pid.
What does close wait mean on a TCP connection?
CLOSE_WAIT is the state for the TCP connection after the remote side has requested a shut down (FIN), and the TCP connection is waiting for the local application to close the socket. There is no timeout for a thread in CLOSE_WAIT state.
Is there a time out for close wait?
No, there is no timeout for CLOSE_WAIT. I think that’s what the off means in your output. To get out of CLOSE_WAIT, the application has to close the socket explicitly (or exit). See How to break CLOSE_WAIT.
When to send a RST when closing a socket?
This way, when you close the socket is forcibly closed, sending a RST instead of going into the FIN/ACK closing behavior. This will avoid the TIME_WAIT state, and may be more appropriate for some uses.