Hi all, Although the subject of this message indicates that the Exception I am getting is a java thing, I am using the apache.commons.net package and have a suspicion that it could be related to this library.
Here's a bit about my program. My program makes a TCPIP connection to other machines and uses the FTP protocol to retrieve files to download on the remote machine. I am using the apache.commons.net.FtpClient java class to provide me with an interface that allows me to connect to the remote machine, log on, list the files that are on the remote computer and download all the files that I need. I have written my own implementation for apache.commons.net.SocketFactory. Also, I have ensured that when I connect to a machine and open a socket, I disconnect when I am done with the connection. After 2 days, I get this exception: java.net.SocketException: No buffer space available (maximum connections reached?): listen failed at java.net.PlainSocketImpl.socketListen(Native Method) at java.net.PlainSocketImpl.listen(Unknown Source) at java.net.ServerSocket.bind(Unknown Source) at java.net.ServerSocket.<init>(Unknown Source) at com.mypackage.TimeoutSettingServerSocketProxy.<init>TimeoutSettingServerSocketProxy.java:28) at com.mypackage.MySocketFactory.createServerSocket(RedflexSocketFactory.java:69) at org.apache.commons.net.ftp.FTPClient._openDataConnection_(FTPClient.java:475) at org.apache.commons.net.ftp.FTPClient.retrieveFile(FTPClient.java:1285) After running a few test programs, I realised that this was because the server was having too many open connections. I have checked my program and I have closed all open sockets. So, I was wondering if there is an issue with apache.commons.net? Does FTPClient open up a ServerSocket without closing it? Also, whats interesting is that once this exception has been thrown, I get disconnected from the machine. Reconnecting to it will obviously throw the exception again. However, when I connect to other machines, it throws the same exception: Failed to connect to 192.168.1.2 No buffer space available (maximum connections reached?): connect If the 'no buffer space available' is thrown because of too many open connections on the server, why can't I connect to other servers (which don't have many open connections). Why does the client (my machine) throw that same exception when trying to connect to OTHER machines? Thank you. Kind regards, Chitra -- View this message in context: http://www.nabble.com/The-java.net.SocketException%3A-No-buffer-space-available-%28maximum-connections-reached-%29%3A-listen-failed-Exception-tp19269806p19269806.html Sent from the Commons - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
