SSLFTPClient put() results in zero length file

Question

I have a business object that contains a method to FTP files to a remote server. This method creates an SSLFTPClient object, sets it up, logs in, and then calls the put command. The put() succeeds without error, but the result is a zero length file being created on the FTP server.

The business object is a JMX MBean running within a JBoss J2EE application server. When I execute the same code from a test case outside of the application server there are no problems, the file is the correct size.

Anyone have experience with running SSLFTPClient in a J2EE environment?

- M

Answer 1

What do the logs say? Are there any exceptions being thrown?
Is it possible that it is unable to find the file?

You can set a property that integrates j/ssl logging with log4j - see the devguide.

You could also try setting an FTPProgressMonitor that simply logs bytes as they get transferred. Also, there is an FTPMessageCollector that you can set to get a record of FTP commands and server reply codes - that should tell you what is happening.

There shouldn't be any problem running SSLFTPClient within JBoss, or any J2EE server unless file access is restricted (which I don't believe is the case with JBoss).

I have a business object that contains a method to FTP files to a remote server. This method creates an SSLFTPClient object, sets it up, logs in, and then calls the put command. The put() succeeds without error, but the result is a zero length file being created on the FTP server.

The business object is a JMX MBean running within a JBoss J2EE application server. When I execute the same code from a test case outside of the application server there are no problems, the file is the correct size.

Anyone have experience with running SSLFTPClient in a J2EE environment?

- M

Answer 2

Thanks, your reply put us on the right track. It was an issue with one of our IO objects, not with the SSLFTPClient. We have it working now.

- M