Just to make it clear. There are other Apache TLPs which are a one-man-show too and used almost everywhere ... this isn't anymuch better

Am 2016-01-06 um 18:25 schrieb Arnaud Héritier:
great, more constructive feedback :-)
Thanks Jason

Both projects are well known and widely used even if log4j v2 is younger
with less downloads such figures are not really representative with all
caches/repositories managers I think.

About logback vs log4j I have really no real preference technically
speaking (I had both branches working in the past and used them a lot in my
professional life - http://www.aheritier.net/united-colors-of-maven/).

In term of community, Log4J is in our apache community and we have few
active committers arround. On Logback side even if I really appreciate Ceki
I'm always afraid about this one-man show project. (and Ceki isn't perfect
too when we see the nightmare of slf4j-api 1.5+ incompatibilities we always
have in 2016 !!).
I agree that we are just talking about a logging implementation but you saw
what it gave for eclipse/aether ....

I'm clearly not enough involved enough in the project to try to convince
anyone about a choice to do but I can just say that not having a colorized
console in 2016 is .... irritating.

For the problem reported by Gary I think that applying the fix in
maven-embedder/src/main/resources/META-INF/maven/slf4j-configuration.properties
(
https://github.com/apache/maven/commit/8cddea291c279130d437bcdf3337f16296558530
)
is safe to be back-ported in master. It is just that
  org.slf4j.helpers.Log4jLoggerFactorywas for Log4J 1 AFAIU and now that
Log4J2 is release/stabilized there is a new one :
org.apache.logging.slf4j.Log4jLoggerFactory

For the replacement of the implementation and activate colors I prefer to
let active committers decide of what they are doing (I imagine that for any
choice they are doing it doesn't avoid you to use another one in your own
distribution ?

I would prefer log4j2 but clearly I never merged it because of the slf4j
conflict that I don't understand (but I didn't spend a lot of time on it)

Cheers



On Wed, Jan 6, 2016 at 5:46 PM, Jason van Zyl <[email protected]> wrote:

These are the numbers I arrived at, happy to run them with different
coordinates but thought these were representative:

gremlin> g.V('vc', 'log4j:log4j').inE.count()
==>84570

gremlin> g.V('vc', 'ch.qos.logback:logback-classic').inE.count()
==>62389

gremlin> g.V('vc', 'org.apache.logging.log4j:log4j-core').inE.count()
==>3134

These are incoming edges across all versions of said coordinate.

On Jan 6, 2016, at 11:15 AM, Jason van Zyl <[email protected]> wrote:

As we said previously when the the question arose again there would be a
discussion. You may not remember, but I expect there to be a discussion.

I have built a graph of Maven Central to analyze the rank (count of all
incoming edges) for Log4J2 and Logback and it is clear from those numbers
that everyone has gone from Log4J to Logback. What has happened, I believe
from the numbers, is that the community followed the founder of the project
and not the owner project in pretty much the exact same way users went with
Jenkins and not Hudson. Anyone is happy to take the graph and verify this
themselves, or generate their own data from the machine that is housing the
copy of Maven Central at Google.

Additionally Igor has an implementation for logging during concurrent
builds based on Logback that I would really like to use, and the color
logging is also easy with Logback. I do not want to use something that the
community at large has not adopted.

Again, anyone is welcome to the code and/or the data if they want to
verify this themselves.

I also am not interested in a debate so if we disagree then just leave
the simple implementation in place. I’m not philosophically motivated much
here in these discussions but I’m vehemently opposed to integrating Log4J2.

On Jan 6, 2016, at 7:55 AM, Arnaud Héritier <[email protected]>
wrote:

thanks for this valuable comment Jason :(

On Wed, Jan 6, 2016 at 1:46 PM, Jason van Zyl <[email protected]> wrote:

-1

Do not merge this branch.

On Jan 6, 2016, at 4:05 AM, Tibor Digana <[email protected]>
wrote:

Hi Arnaud,
Do you plan a Release Version to merge this branch o master in Maven?

On Tue, Jan 5, 2016 at 7:18 AM, Arnaud Héritier [via Maven] <
[email protected]> wrote:

Just because only 2.4 was available when I updated this feature
branch
few
months ago.

Le mardi 5 janvier 2016, Gary Gregory <[hidden email]
<http:///user/SendEmail.jtp?type=node&node=5857870&i=0>> a écrit :

Hi Arnaud,

Thank you for the update.

Why not update the Log4j 2 dep from 2.4 to 2.5?

Gary

On Mon, Jan 4, 2016 at 2:46 PM, Arnaud Héritier <[hidden email]
<http:///user/SendEmail.jtp?type=node&node=5857870&i=1>
<javascript:;>> wrote:

Hi Gary,

I fixed this in the branch :
https://github.com/apache/maven/commits/slf4j-log4j2.4
The fix is in





maven-embedder/src/main/resources/META-INF/maven/slf4j-configuration.properties

(





https://github.com/apache/maven/commit/8cddea291c279130d437bcdf3337f16296558530
)
It is the update I did after my old blog post :
http://www.aheritier.net/united-colors-of-maven/

BR

On Fri, Dec 25, 2015 at 4:09 PM, Gary Gregory <[hidden email]
<http:///user/SendEmail.jtp?type=node&node=5857870&i=2>
<javascript:;>>
wrote:

Hi All,

Happy Holidays.

Can the next version of Maven be rid of this warning:

[WARN] The SLF4J binding actually used is not supported by Maven:
org.apache.logging.slf4j.Log4jLoggerFactory
[WARN] Maven supported bindings are:
[WARN] (from






jar:file:/E:/Java/apache-maven-3.3.9/bin/../lib/maven-embedder-3.3.9.jar!/META-INF/maven/slf4j-configuration.properties)

- ch.qos.logback.classic.LoggerContext
- org.slf4j.helpers.Log4jLoggerFactory
- org.slf4j.impl.SimpleLoggerFactory

Is there a step I am missing to use Log4j 2 cleanly? My steps are
here:

https://garygregory.wordpress.com/2015/03/23/watch-maven-in-color/

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Thanks,

Jason

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Thanks,

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