Java socketChannel to detect disorderly closed connection

Question

I know that a SocketChannel is "notified" about an orderly closed connection by receiving "-1" after calling read().

But how can it notify me about an disorderly closed connection? (as part of a whole NIO based server, working with selector and non-blocking socketChannels)

Why would some -1 this question? What's wrong about it? the minimum you can is to explain. — slashms, May 07 '17 at 10:10
You've received "-1" because you had an orderly closed connection :) — avim, Jun 26 '17 at 07:46

score 1 · Accepted Answer · answered May 04 '17 at 11:44

1

A write() will throw IOException: connection reset. Eventually. Due to TCP buffering it won't happen on the first write after the failure.

answered May 04 '17 at 11:44

user207421

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Thanks @EJP, but that is the only way? what if I only expect to read as a server? – slashms May 04 '17 at 14:10
Also, What will happen if after it is disorderly closed I will call socket.close()? will it block because it might wait for the OS tcp connection closure? – slashms May 04 '17 at 14:31
1

You may or may not get the reset if you only read. `close()` never waits, unless you're in blocking mode and have done silly things to SO_LINGER. – user207421 May 05 '17 at 03:47

Java socketChannel to detect disorderly closed connection

1 Answers1