Does the loraserver open a socket everytime it gets a packet?

My server is unable to acknowledge the join request. My app-server log shows like this:

time=“2018-08-13T12:41:13+05:30” level=error msg=“processing rx packet error: join-request to join-server error: http post error: Post http://localhost:8003: dial tcp 127.0.0.1:8003: socket: too many open files” data_base64=“ADJUdph4VjQSpP4gAAujBADqM4gFCjk=”