Appengine: SocketException: Cannot assign requested address on socket.connect

Question

I am using java.net.Socket.connect() to connect to an FTP server in passive mode on AppEngine. It works around 30% of the time, but I usually get the following error:

java.net.SocketException: System error: errno: 99, detail:Cannot assign requested address

It sounds as though the host simply doesn't have any available ports for outgoing connections (I am not requesting a specific port.) I get the same result when I use new java.net.Socket() I would appreciate any thoughts as to what might be happening.

pomu0325 · Accepted Answer · 2014-07-29 05:17:35Z

1

I had a lot of same error while opening sockets for FTP, but error rate is decreased after setting socket.setSoLinger(true, 0) and socket.setReuseAddress(true).

answered Jul 29, 2014 at 5:17

pomu0325

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Tad Over a year ago

That may have made it somewhat better, but I am still getting the error in question more often than not.

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