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[IDV #TDV-431327]: j3d error msg



> Dear Yuan:
> 
> We have decided that Xvfb is simply broken in our 64-bit CentOS 5.5
> environment.  We have started running an instance of the Xvnc VNC server
> to provide the Xserver we need for our batch programs and it works fine
> for us.  I would encourage others to try Xvnc if they have trouble with
> Xvfb.  The intended purpose of Xvnc is to run a virtual
> X session to which users can connect over the network. We are simply
> running it for the X server to support batch IDV programs, though we
> could connect to the server from a VNC client, if necessary for debugging.
> 
> Here are some observations on the Xvfb issue:
> 
> We gave up on Xvfb after concluding that it is broken, at least
> the version which is provided with CentOS 5.5.  We suspect
> that it was not ported correctly to a 64-bit environment.
> Perhaps it makes invalid assumption about the sizes of
> data types -- something that is likely to be critical
> for a program which handles a complex binary protocol.
> 
> Some clues:
> 
> A user of IDV reported that he was able to use Xvfb in a
> 32-bit CentOS environment, but had no luck in a 64-bit installation.
> 
> valgrind reports many, many errors when I run Xvfb on mopfl,
> but none when I run it on my personal 32-bit Fedora system.
> 
> Thanks for your help.
> 
> Regards,
> Vince

Vince,
   Many thanks.
   I posted your discovery in our idv user list, and it will benefit many users.


Yuan
> 
> On 7/6/2010 1:02 PM, Unidata IDV Support wrote:
> >> Dear Unidata team:
> >>
> >> We're attempting to run an IDV script as a batch process on a Linux
> >> server without
> >> depending on the graphics card.  It appears we still need to give IDV
> >> access to an X server, and we are trying to use Xvfb as that X server.
> 
> > Vince,
> >        I don't have much experience of Xvfb, after browsing the support 
> > archive, one suggestion is to upgrade the Xvfb to newer version, here is a 
> > link of the IDV user discussion:
> >
> > http://www.unidata.ucar.edu/mailing_lists/archives/idvusers/2010/msg00002.html.
> >
> >
> > Yuan
> 
> > Ticket Details
> > ===================
> > Ticket ID: TDV-431327
> > Department: Support IDV
> > Priority: Normal
> > Status: Open
> >
> >
> 
> --
> Vince Dean
> HIRDLS Project - SIPS Operations Manager
> University of Colorado
> MOPITT Project - Data Manager
> National Center for Atmospheric Research
> Phone: (303) 497-8077
> 
> 


Ticket Details
===================
Ticket ID: TDV-431327
Department: Support IDV
Priority: High
Status: Closed


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