FTPException: Description (ISA) is NULL or empty

Question

Version: edtftpj-ssl-1.1.6
Remote Server: TDEngine from ClickCommerce

I get at put operation during a ftps session this error.
Do you have any clue whats the problem?

Do you know if anything was changed to make the ftps implementation more robust in this area at the newer versions of edtftpj/pro?

Answer 1

No, I'm not familiar with this error. I think it's thrown as a result an error on the server, since I'm fairly certain no such error message would appear from any of our code. Could you please investigate if this is a server-side error by:

• trying the same operation with other FTPS clients (e.g. FileZilla)
• consulting server documentation
• contacting support for the server software

- Hans (EDT)

Answer 2

Hi Hans ;-)

(its every time a little bit complex to get the customers to enable tracing at their servers and to test with other clients ;-)
In the most cases i dont have any access to their internal server structures or to the application server itself, so my first attempt was to ask here, if somebody already knows this error from other ftp servers.
He asked the support of the Deutsche Bank server if this is a error at server side, but this takes a long time for answer.

Here ist the Log:
DEBUG 29 Sep 2005 13:40:25,307 [Thread-6] FTPControlSocket - 150 Opening ASCII mode data connection for 20050929A00000013494 .
DEBUG 29 Sep 2005 13:40:25,323 [Thread-6] FTPClient - Transferred 1231 bytes to remote host
DEBUG 29 Sep 2005 13:40:25,745 [Thread-6] FTPControlSocket - 530 Description (ISA) is NULL or empty

Seems that i can ignore this message. :-)