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comp.lang.ruby

webrick, threads, and i/o

ahoward

10/4/2003 12:10:00 AM

5 Answers

NAKAMURA, Hiroshi

10/4/2003 2:25:00 AM

0

Hi,

> From: "Ara.T.Howard" <ahoward@fsl.noaa.gov>
> Sent: Saturday, October 04, 2003 11:12 AM

> if i want to write a webrick application that mounts many servlets do i need
> to be concerned that, if one of the servlets blocks on i/o, the entire
> (threaded) webserver will also be blocked?

No. WEBrick creates worker thread for each request.
So, take care if you mount a servlet factory which returns
singleton servlet instance. It runs under MT condition.

Regards,
// NaHi

ahoward

10/4/2003 4:16:00 AM

0

NAKAMURA, Hiroshi

10/4/2003 12:49:00 PM

0

Hi,

> From: "Ara.T.Howard" <ahoward@fsl.noaa.gov>
> Sent: Saturday, October 04, 2003 3:13 PM

> my earlier post could have used an example, here is an example of where
> blocking in one request seems to block the entire server:

I didn't check the article, but...

> fifo = open 'fifo', 'r'
> res.body = fifo.read

You open fifo with blocking mode and read here. Blocking entire process
here is expected behavior if I understand correctly.

> fifo = open 'fifo', 'w'
> msg = "%s:%s" % [self.class, Time.now.to_s]
> fifo.puts msg

> now, if you run this and then point your browser at
>
> http://127.0.0.1...
>
> you will see the time. however, if you then try one, or more, of the
> following in any order
>
> http://127.0.0.1...
> http://127.0.0.1:...

I think the process is blocked at the second access. Does third
access works?

> you will see ALL windows hanging. does this make sense? how does one go
> about designing servlets which will then block, like POST servlets, in a way
> that would not block the entire webserver?

You can open fifo with File::RDONLY|File::NONBLOCK for read side and
File::WRONLY|File::NONBLOCK for write side. I think it should work.

In other words, if you want the server never blocks no matter what
servlets do, you should use other process forking WWW server application,
or should make your server using WEBrick as a toolkit.

Regards,
// NaHi

ahoward

10/4/2003 3:12:00 PM

0

Justin Biggs

1/13/2010 4:43:00 PM

0

Maybe it's similar to the problem I ran into a little while back. Have you
tried installing SQL Server 2005 client components on your EP box? I know it
sounds really odd, especially if the EP box isn't running SSAS or SSRS, but
it worked. Have a look at this thread:

https://community.dynamics.com/forums/p/13636/40808....

--
Best Regards,
Justin


"Kristof Meesens" wrote:

> Hello Justin,
>
> Thanks for your reply.
> It is a 64bit server and I executed the AxUpdatePortal.exe.
> But the error still exists...
>
> Regards,
>
> Kristof.
>
>
> "Justin Biggs" wrote:
>
> > Are you installing to a 64 bit server? There are considerations you need to
> > make when doing so, as the default deployment fails when checking to see if
> > Sharepoint is installed (looks for the wrong registry key on a 64 bit box).
> > There's a utility that you can run that will deploy correctly, that's
> > installed when SP1 is applied. It's found (default location) in Program
> > Files\Microsoft Dynamics AX\50\Setup\AxUpdatePortal.exe. Hope this helps.
> > --
> > Best Regards,
> > Justin
> >
> >
> > "Kristof Meesens" wrote:
> >
> > > Hello,
> > >
> > > I have a problem installing the Enterprise Portal.
> > > When running the setup of the Enterprise Portal, I receive a message that
> > > the setup was completed successfully.
> > > But when I open the portal, I receive an error from SharePoint ???an
> > > unexpected error has occurred???.
> > > In the eventviewer, I find the error bellow:
> > >
> > > The website http://testserver/sites/DynamicsAx is not made correctly.
> > >
> > > Object reference not set to an instance of an object.
> > >
> > > System.NullReferenceException
> > > at
> > > Microsoft.Dynamics.Framework.Portal.Deployment.AOTPageDef.DeployWebPages(ISession
> > > session, SPWeb site, Boolean isPublicSite, Boolean allowUnsafeUpdates,
> > > Boolean overwrite)
> > > at
> > > Microsoft.Dynamics.Framework.Portal.Deployment.EPWebModule.CreateAxSitesAndPages(SPWeb site, ISession session, Boolean isPublicSite)
> > > at
> > > Microsoft.Dynamics.Framework.Portal.Deployment.EPWebModule.ProcessAxSiteCreation(SPWeb site)
> > > For more information, see Help and Support Center at
> > >
> > >
> > > I tried to remove all the components and reinstall them.
> > > I even cleaned up the register and deleted the folder structure of AX.
> > >
> > > Someone knows how to solve this?
> > >
> > >
> > > Regards,
> > >
> > > Kristof Meesens.