Java: How URLConnection treats completed TCP connection?

Question

When I use URLConnection to do some HTTP requests, I could only close InputStream and OutputStream, but not the socket.

Does the class automatically close the socket? How does it do it? Will the server return a FIN or something else?

If I produce many threads including each URLConnection in them, will it automatically reuse the socket? I caught some packages, it shows about every 3 connections share 1 socket.

user207421 · Accepted Answer · 2011-03-01 09:17:47Z

1

It pools the socket for possible future reuse within a short period of time, I think 5 or 15 seconds. HttpURLConnection.disconnect() is the only thing that actually closes it.

answered Mar 1, 2011 at 9:17

user207421

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