Maybe related to being behind a firewall? Can you use regular ftp
tools and are you using a passive connection?
>>>>> On Wed, 01 Oct 2003 12:26:34 -0600, Kris Nuttycombe <[EMAIL PROTECTED]> said:
> Hello, all - any help is appreciated. I'm having difficulty using
> the commons.net.ftp.FTPClient when attempting to get a file
> list. The client connects correctly and I can issue CWD commands
> without difficulty, but as soon as I issue listFiles() or nlst() it
> fails with the reply string "Unable to build data connection:
> Connection timed out"
> Does anyone have an idea of where I should start looking to fix
> this?
> Thanks,
> Kris Nuttycombe
> Here is some debugging output:
> 0 [main] DEBUG gov.noaa.nosa.argo.ArgoReader - 220
> zeus.aoml.noaa.gov FTP server ready 116 [main] DEBUG
> gov.noaa.nosa.argo.ArgoReader - 230 Anonymous access granted,
> restrictions apply. 167 [main] DEBUG gov.noaa.nosa.argo.ArgoReader
> - 250 CWD command successful. 170 [main] DEBUG
> gov.noaa.nosa.argo.ArgoReader - FTP connection successfully
> established to ftp.aoml.noaa.gov/phod/pub/ARGO_FTP/argo/nc/aoml 170
> [main] DEBUG gov.noaa.nosa.argo.ArgoReader - FTP Data connection
> mode: 0 java.io.IOException: FTP client could not obtain file list :
> 425 Unable to build data connection: Connection timed out
> Here is the code that generated it:
> client.connect(host);
> log.debug(client.getReplyString());
> if(!FTPReply.isPositiveCompletion(client.getReplyCode())) { throw
> new IOException("FTP server at host " + host + " refused
> connection.");
> }
> client.login(user, password);
> log.debug(client.getReplyString());
> if(!FTPReply.isPositiveCompletion(client.getReplyCode())) { throw
> new IOException("FTP login failed for user anonymous: " +
> client.getReplyString());
> }
> client.changeWorkingDirectory(path);
> log.debug(client.getReplyString());
> if(!FTPReply.isPositiveCompletion(client.getReplyCode())) { throw
> new IOException("FTP client could not change to remote directory " +
> path + ": " + client.getReplyString());
> }
> log.debug("FTP connection successfully
> established to " + host + path); log.debug("FTP Data connection
> mode: " + client.getDataConnectionMode()); FTPFile[] files =
> client.listFiles(path);
> if(!FTPReply.isPositiveCompletion(client.getReplyCode())) { throw
> new IOException("FTP client could not obtain file list : " +
> client.getReplyString());
> }
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=====================================================================
Jeffrey D. Brekke [EMAIL PROTECTED]
Wisconsin, USA [EMAIL PROTECTED]
[EMAIL PROTECTED]
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