"Permission Denied" while putting files to ftp

Question

My application got this FTPException while trying to upload some txt and tif files to a remote server using binary mode.Here's the stacktrace info:

Nested Exception is:
com.enterprisedt.net.ftp.FTPException: Permission denied.
   at com.enterprisedt.net.ftp.FTPControlSocket.validateReply(FTPControlSocket.java:577)
   at com.enterprisedt.net.ftp.FTPClient.initPut(FTPClient.java:613)
   at com.enterprisedt.net.ftp.FTPClient.putBinary(FTPClient.java:719)
   at com.enterprisedt.net.ftp.FTPClient.putBinary(FTPClient.java:702)
   at com.enterprisedt.net.ftp.FTPClient.put(FTPClient.java:549)
   at com.enterprisedt.net.ftp.FTPClient.put(FTPClient.java:512

I checked the ftp server settings and found nothing wrong.
To be more strange,that exception does not always show up.
Once a while,the application worked and i could see the file uploaded to ftp server!

Can anybody tell me what's the problem?

Answer 1

Try using a command-line FTP client or an FTP client application like FileZilla to perform the same operation. My expection is that you will have the same problem with these, which would indicate that it's a permission problem on the server.

- Hans (EDT)

Answer 2

Got it. The server disabled the delete and append privilege, allowing for reading and writing only. Therefore,when it comes to overriding an existing file,permission denied....