Re: [cross-project-issues-dev] The Eclipse IDE 2019-12 release is availa

[Ed Merks <ed.merks@xxxxxxxxx>]

FYI,

Of course no great release is complete without an awesome new glitch.  
For the 2019-06 release, download.eclipse.org transparently redirected 
to archive.eclipse.org so loading

http://download.eclipse.org/technology/epp/packages/2019-06/compositeContent.jar

would serve up

http://archive.eclipse.org/technology/epp/packages/2019-06/compositeContent.jar

That wasn't a good thing.  The transparent redirection behavior 
(including transparent redirection to mirrors) has since been disabled 
for a number of additional reasons.

For the 2019-12 release, a HEAD request to 
http://download.eclipse.org/technology/epp/packages/2019-12/compositeContent.jar 
return stale information. I.e., the following code:

    URL url = new 
URL("http://download.eclipse.org/technology/epp/packages/2019-12/compositeContent.jar";);
    HttpURLConnection openConnection = 
(HttpURLConnection)url.openConnection();
    openConnection.setRequestMethod("HEAD");
    openConnection.connect();
    int responseCode = openConnection.getResponseCode();
    System.err.println("url=" + url + " response=" + responseCode + " 
lastModified=" + openConnection.getLastModified() + " contentLength="
        + openConnection.getContentLength());

prints the following result:

url=http://download.eclipse.org/technology/epp/packages/2019-12/compositeContent.jar 
response=200 lastModified=1575643878000 contentLength=425

Unfortunately, p2 and the Eclipse Installer's infrastructure rely on 
proper/correct server responses.  The net effect of this incorrect 
response is to indicate that it's valid to use a locally cached version 
of compositeContent.jar, if it exists, which will find only M2, M3, and 
RC1, which still exist on the server.  I don't know if this will make 
installs fail or if it will make installs install RC1 instead of R, but 
clearly both are very bad. The average typical user will likely not have 
loaded http://download.eclipse.org/technology/epp/packages/2019-12 
before, so for those it won't be a problem.  But for those with a cache, 
this will be a problem.

I've opened https://bugs.eclipse.org/bugs/show_bug.cgi?id=558452 to 
track this problem.  It needs to be fixed ASAP.  Furthermore, I hope 
that the problem is not fixed simply by manually flushing some cache 
because we don't want to see this problem ever again. This resource was 
deleted 19 hours ago and the server, in general, needs to return a 404 
for HEAD/GET requests as soon as possible after any resource has been 
removed.

Regards,
Ed

On 18.12.2019 16:00, Frederic Gurr wrote:
> The main repository is at
>
>    http://download.eclipse.org/releases/2019-12/
>
> (http://download.eclipse.org/releases/latest also points to it)
>
> The EPP (all-in-one) packages are available at
>
>    https://www.eclipse.org/downloads/eclipse-packages/
>
> The landing page can be found here:
>
>    https://www.eclipse.org/eclipseide/2019-12/
>
> Thanks to all users, bug reporters, contributors, committers, releng
> engineers and everyone else involved with making this release possible!
>
> Happy Holidays!
>
> Regards,
>
> Fred