[gridftp-user] client debugging

[Jaime Frey]

On Jul 2, 2008, at 2:25 PM, Jaime Frey wrote:

> Thanks. The debugging output tells more of what's going on, but I  
> still don't have a complete picture.
>
> Attached below is the output caused by a globus_ftp_client_rmdir(),  
> with timestamps prepended. I had 50 client processes issuing  
> commands in parallel, but each client was issuing only one command  
> at a time.
>
> The resulting error string was "an end-of-file was reached  
> globus_xio: An end of file occurred". Out of the 50 clients, 11  
> failed with this error. All of them showed similar output to that  
> below, including a gap of exactly 10 minutes.
>
> It's unclear to me why it's stalling in authentication. I'm going to  
> strace the processes next to pin down what's happening on the wire.  
> In the meantime, does the output below suggest what's wrong to you?


Update: Strace reveals the following sequence of events:
* Client connects to server
* Server sends '220 Server ready'
* Client sends 'AUTH GSSAPI'
* Client selects on read, no data arrives
* 10 minutes later, client gets EOF on connection

So it looks like the problem is on the server side.

+--------------------------------+-----------------------------------+
|           Jaime Frey           | I used to be a heavy gambler.     |
|       jfrey at cs.wisc.edu        | But now I just make mental bets.  |
| http://www.cs.wisc.edu/~jfrey/ | That's how I lost my mind.        |
+--------------------------------+-----------------------------------+