[e4-dev] Update manager - very slow install

[Dan Rubel <dan_rubel@xxxxxxxxxxxxxxxxxx>]

I'm testing Integration Build: I20100224-2100 on Win7 64-bit and 
installation via the update manager is so slow during the "Calculating 
requirements and dependencies..." phase that the first several times I 
thought it was broken. I tried the following update sites:

    http://subclipse.tigris.org/update_1.6.x
    
http://download.instantiations.com/out/QualityEclipse/continuous/latest/update/3.5/

Then after a long time ( 15 minutes or so ) the following appears...

    Some sites could not be found.  See the error log for more detail.
    No repository found at 
http://download.eclipse.org/eclipse/updates/3.6-I-builds/I20100216-0800.
    No repository found at 
http://download.eclipse.org/webtools/downloads/drops/R3.2/S-3.2.0M2-20090924194346/updateSite.

Browsing 
http://download.eclipse.org/eclipse/updates/3.6-I-builds/I20100216-0800, 
I see "Access Forbidden" and and 
http://download.eclipse.org/webtools/downloads/drops/R3.2/S-3.2.0M2-20090924194346/updateSite 
returns a 404.

During this long period, I finally noticed that every so often a jar 
file name would briefly appear in the workbench status line area. I'm 
guessing that p2 is trying to access multiple files on each of these 2 
unavailable repositories. Perhaps if a repository is unavailable, it 
could more gracefully degrade... somehow let the user know that things 
are not being found as it is happening. In the short term, I don't know 
if the problem is on my end or that the URLs need to be fixed in the e4 
build or that the update site is not yet ready for prime time, but it 
was a fairly painful wait to install software using the update manager.

https://bugs.eclipse.org/bugs/show_bug.cgi?id=303902

- Dan