I am unable to shutdown (close) the socket after a communication abort on client side ! The socket remains open for 10 or 15 minutes and I am unable to restart the TCP communication on port 5000 of local machine with an async call. The socket status seen by command "netstat -ano | findstr :5000" giv…

Yesss... It caught the exception! Thanks a lot Phil. regards

Don’t use python’s socket module. Use Java’s sockets. Use the SO_REUSEADDR socket option.

Thanks for your reply , yes I am indeed using javas libraries from python wrapper . Let me try to enable the reuse option Regards

I just checked my code , I have already enabled the SO_REUSEADDR option thru function system.util.getGlobals()['server'].setReuseAddress(True) Also the socket state is shown as LISNTENING not in TIME_WAIT state in the dos netstat command: TCP 127.0.0.1:5000 0.0.0.0:0 LISTENING 16148 That means t…

You have to set that socket option before you bind the listening address.

yes its before the bind call. The code goes something like this. try: system.util.getGlobals()['server'] = project.socketscript.ServerSocket() system.util.getGlobals()['server'].setReceiveBufferSize(250000) system.util.getGlobals()['server'].setReuseAddress(True) system.util.getGlobals()['serv…

The socket option doesn’t affect any sockets with that address opened earlier without it–those still have to go through their long timeouts before the address will be freed up. The socket option only prevents the long timeout for the instance it is applied to.

The socket connection and communication goes well as expected between this server and a JS client in request response mode. The server waits on a read on socket from a client then responds to a request received from the client and the cycle goes on fine, however when I interrupt the client thru ctrl…

Something doesn’t make sense. The actual traffic between your server and the client should be happening on the temporary port of the socket returned from the .accept() method of the ServerSocket(). Which makes each client connection independent of the listening port. (The thread handling the Server…

Oh forgot to mention that its not a generic socket server, its just to cater to a single client on a single port on an Aysyc invoke function. I may generalize it later , but singleton will suffice my present needs. I could have multiple instances of this function on separate async calls on differen…

I don’t ever use TCP singleton connections, even for a singleton application, so I have no experience to guide you. Good luck.

Closing a TCP Socket from Jython

Ignition

pturmel March 5, 2020, 6:35pm 14

Separate problem with your syntax. See this: