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Re: Log4J doesn't work at all

by Jacob Kjome :: Rate this Message:

> But I don't want to use commons-logging. I want to use log4j.

You are missing the point. **You** want to use Log4j. That's fine. But
HttpClient doesn't directly use Log4j. It directly uses commons-logging,
which is a Logger adapter that supports various logging implementations, one
of which is Log4j.

If you want to use Log4j, then you ***have*** to use commons-logging.jar, and
NOT commons-logging-api.jar, plus log4j.jar. To avoid commons-logging (and
some of the problems it can create), you can skip commons-logging.jar and use
SLF4J [1]: jcl-over-slf4j.jar + slf4j-api.jar + slf4j-log4j12.jar +
log4j.jar. But either way, you can't avoid having the commons-logging
packages/classes (which jcl-over-slf4j.jar mimics) in the classpath because
HttpClient has a hard dependency on it.

> In any case, that System.property stuff didn't help either.

Because it's commons-logging specific and totally irrelevant to Log4j.
Besides, you were setting Log4j packages as properties and that is totally
meaningless. For instance, you wrote...

System.setProperty("log4j.logger.org.apache.http.client", "DEBUG");

But HttpClient's instructions say to do (again, read the instructions more
closely)...

System.setProperty("org.apache.commons.logging.simplelog.log.org.apache.http.wire",
"DEBUG");

> Part of the code simply gets..... ignored. Why?

Because you are not following instructions.

[1] http://slf4j.org/legacy.html#jcl-over-slf4j

Jake

On Tue, 10 Apr 2012 16:08:07 +0200
tommmmmm <tommmmmm@...> wrote:

> On 10 April 2012 15:34, Jacob Kjome <hoju@...> wrote:
>
>>
>> That system property stuff only applies to commons-logging, not Log4j.
>> Look more closely at the instructions [1].
>>
>> BTW, are you using commons-logging-api.jar? If so, that's the problem.
>> You need commons-logging.jar. See the commons-logging release notes [2].
>>
>> [1]
>>http://hc.apache.org/**httpcomponents-client-ga/**logging.html<http://hc.apache.org/httpcomponents-client-ga/logging.html>
>> [2]
>>http://commons.apache.org/**logging/RELEASE-NOTES.txt<http://commons.apache.org/logging/RELEASE-NOTES.txt>
>>
>>
>> Jake
>
>
> But I don't want to use commons-logging. I want to use log4j. In any case,
> that System.property stuff didn't help either.
> Part of the code simply gets..... ignored. Why?

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