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Re: [cross-project-issues-dev] Code Recommenders, Jubula, m2e-wtp and other users of org.slf4j.api and providers of ch.qos.logback.slf4j

In investigating
https://bugs.eclipse.org/bugs/show_bug.cgi?id=407797

we've seen there are two projects that use the older version of org.slf4j.api ... Code Recommenders and Jubula. Any chance you can "move up"?

And, we've found two projects that "provide" the old, incompatible logging fragment ch.qos.logback.slf4j 1.0.0.v20120123-1500, both with m2e in the name :) ... any chance you can provide more specific input, that includes only the most recent?

My suspicion is that it is (mostly) the old fragments that are problematic ... That is, p2 sees them as "valid solutions" to the constraints its given ... but, it is not a satisfactory solution to the humans using the system. One "cure" might be to make sure only the most
recent fragment is available in the repositories that you "provide" as input to the common repository.

See the bug for suggestions on how to do that ... how to provide more specific versions of stuff, without literally removing old stuff. (released repositories are supposed to be immutable ... but, you do not need to "provide" your whole entire composite repo as input to the common repo ... only the most recent, specific things that you are willing to have end up there).

HTH





From:        David M Williams/Raleigh/IBM@IBMUS
To:        cross-project-issues-dev@xxxxxxxxxxx,
Date:        05/16/2013 01:03 PM
Subject:        [cross-project-issues-dev] Code Recommenders and other users of        org.slf4j.api
Sent by:        cross-project-issues-dev-bounces@xxxxxxxxxxx




If you use "org.slf4j.api" please see bug 407797.

https://bugs.eclipse.org/bugs/show_bug.cgi?id=407797

There's several complicated issues going on in that bug, but one cure might be if everyone "used the latest" version of org.slf4j.api (1.7.2, instead of 1.6.4).


>From the b3 aggregator log, it appears that Code Recommenders is the one "pulling in" version 1.6.4.


Is that on purpose? That is, do you purposely constrain/include that older version? Any chance to move up to the latest?


These loggers (and their fragments) are a case where having multiple versions in the repository can mess up other projects -- that is, things "work fine" if using your individual project repository ... but, not once one big repository tries to "satisfy everyone".


While there might be other bugs involved causing the fundamental problem, it seems that "using the latest" would be a quick, practical solution, here at RC1.


Please comment in the bug, or (anyone) make other suggestions ... but, it is something that needs to be solved.


If I don't hear anything soon, I may try a test run temporarily disabling Code Recommenders, just to test the hypothesis that it is the (only) source of these "conflicting" requirements.


Thanks,

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