Hi Matt,
Whatever you are doing is triggering root to use root protocol not xroot
protocol. Now, your xroot server has not been configured to also run root
protocol. So, when you get there it doesn't know what to do with you and
simply closes the connection. I suspect that using uid/pswd authentication
(which is not currently supported in xroot) is causing it to step down a
notch and try root protocol.
Andy
On Sat, 26 Feb 2005, Peter Elmer wrote:
> Hi Matt,
>
> On Sat, Feb 26, 2005 at 11:17:42AM -0800, Langston, Matthew David wrote:
> > I know this configuration works because I am able to read ROOT files
> > (histograms, trees, etc.) using our Java xrootd client. However, when
> > I try to use the ROOT 4.02.00 command line I get this error from ROOT:
> >
> > root [0] myfile myfile = TFile::Open("root://glast01.slac.stanford.edu//nfs/farm/g/glast/u07/mcenery/systests/GlastRelease/v6r2p1/VerticalGamma100MeV/linux/VerticalGamma100MeV_Histos.root");
> <...>
> > Error in <TWinNTSystem::SendRaw>: cannot send buffer
> > Info in <TAuthenticate::Authenticate>: attempted methods SSH/UidGid are not supported by remote server version
> > Info in <TAuthenticate::Authenticate>: failure: list of attempted methods: UsrPwd SSH UidGid
> > Error in <TPSocket::Authenticate>: authentication failed for [log in to unmask]
> > Error in <TNetFile::TNetFile>: can't open connection to rootd on host glast01.slac.stanford.edu at port 1094
> > Error in <TNetFile::Create>: authentication attempt unsuccessful
> > root [1]
>
> I don't have any experience with using the TXNetFile client on Windows.
> There were some outstanding issues, but I don't recall if they've been dealt
> with yet. Maybe Gerri or Fabrizio can comment.
>
> One thing that is clear above is that you are not getting the right client
> from the root plugin manager (i.e. you got the old TNetFile instead of the
> new TXNetFile). We should probably figure out why that is happening first.
> From etc/system.rootrc I would expect "root://" to default to TXNetFile
> for all platforms. I don't see any platform ifdef's there, so something else
> must be going wrong.
>
> I guess the java client is the one that Tony has mentioned in his CHEP
> talk?
>
> Pete
>
>
> > And this is what I get in the xrootd log file:
> >
> > glast@glast01 $ tail -f /tmp/xrootd/xrdlog
> > 050226 10:44:11 3310 XrdLink: ?:45@ntvpn2-008 disconnected after 0:00:00 (matching protocol not found)
> > 050226 10:44:12 3310 XrdLink: ?:45@ntvpn2-008 disconnected after 0:00:00 (matching protocol not found)
> >
> > In the ROOT stack trace, I see that it is trying to login as "[log in to unmask]". OK, so I try telling ROOT to use anonymous credentials using this:
> >
> > root [1] TAuthenticate::SetGlobalUser("anonymous");
> >
> > However, I get the same "authentication attempt unsuccessful" error, except that now the ROOT stack trace reports that "[log in to unmask]" is not authorized.
> >
> > What am I doing wrong? Is it a ROOT configuration problem (perhaps something needs to go into .rootrc), is it an xrootd configuration problem? What does the "matching protocol not found" mean in the xrootd log file? What protocol is it talking about - perhaps an authentication protocol that I need to configure?
> >
> > As I mentioned, our Java client is able to read ROOT files from our simple xrootd server without problems. Our Java client sends "anonymous" for the username and "langston@trinity" for the password. This is what I get from the xrootd log file when connecting using our Java client:
> >
> > glast@glast01 $ tail -f /tmp/xrootd/xrdlog
> > 050226 11:08:30 3310 XrootdXeq: User logged in as anonymou.12345:45@ntvpn2-008
> > 050226 11:08:38 3310 XrdLink: Unable to receive from anonymou.12345:45@ntvpn2-008; connection reset by peer
> > 050226 11:08:38 3310 XrdLink: anonymou.12345:45@ntvpn2-008 disconnected after 0:00:11 (link read error)
> >
> > Even though there is a "connection reset by peer" and a "link read error" message, the Java client is still able to read histograms and trees just fine.
> >
> > Any help on getting the ROOT command line to be able to read files from our xrootd server would be appreciated.
> >
> > Warmest regards, Matt
> >
>
>
>
> -------------------------------------------------------------------------
> Peter Elmer E-mail: [log in to unmask] Phone: +41 (22) 767-4644
> Address: CERN Division PPE, Bat. 32 2C-14, CH-1211 Geneva 23, Switzerland
> -------------------------------------------------------------------------
>
