Re: [xwiki-users] Configuration to use log4j instead of logback for xwiki 3.1 and beyond?

Thanks Vincet and Sergiu. But After doing suggested steps and i hit the

https://localhost/mywiki/. I get http status 404 error(requested

not found). What i did is this inside WEB-INF\lib 1)placed log4j-1.2.8 and slf4j-log4j12-1.6.1 2)removed log4j-over-slf4j-1.6.2,logback-classic-0.9.30 and logback-core-0.9.30 inside WEB-INF\classes placed log4j.properties On startup, inside the tomcat logs 28-Apr-2012 18:50:05.468 SEVERE org.apache.catalina.core.StandardContext.start Error listenerStart 28-Apr-2012 18:50:05.468 SEVERE org.apache.catalina.core.StandardContext.start Context [/mywiki] startup failed due to previous errors Looks like there is some other jar too which is conflicting. As soons as reverted back above steps , application runs fine.

On Sun, Apr 29, 2012 at 12:01 PM, Vincent Massol <vincent(a)massol.net>

> > On Apr 29, 2012, at 5:24 AM, Sergiu Dumitriu wrote: > >> On 04/28/2012 04:40 PM, Vincent Massol wrote: >>> >>> On Apr 28, 2012, at 8:48 PM, Sergiu Dumitriu wrote: >>> >>>> On 04/28/2012 08:02 AM, Vincent Massol wrote: >>>>> Hi Mohit, >>>>> >>>>> On Apr 28, 2012, at 1:34 PM, mohit gupta wrote: >>>>> >>>>>> At http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Logging, it > is >>>>>> stated that By default XWiki is configured so that SLF4J uses > Logback. >>>>>> XWiki's >>>>>> Logback configuration is located in the WEB-INF/classes/logback.xml > file >>>>>> for For XWiki 3.1 and beyond. But if user want to use log4j instaed > of >>>>>> logback, >>>>>> where it needs to be configured. >>>>>> >>>>>> I did not find any property related to that in xwiki.cfg or >>>>>> xwiki.properties.What i tried deleting the logback.xml and putting

>>>>>> log4j.properties instaed. But xwiki >>>>>> does not pick log4j.properties. As per my understanding, xwiki is > using >>>>>> SLF4J, there should be hook somewhere where we should be able to > change to >>>>>> log4j insteadd >>>>>> of logback. >>>>> >>>>> I've updated > http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Logging >>>> >>>> Some feedback on the documentation you just added: >>>> >>>> I wonder if log4j-over-slf4j should be removed or not, since it might > conflict with the real log4j library (they define the same classes). >>> >>> It must be there or the bridging won't work. Our build automatically > verifies that no 3rd party dependency we drag includes log4J. We handle > this by using<exclusions> when a jar includes log4J transitively. >> >> What bridging? From log4j to slf4j? But when slf4j will try to write > back to log4, won't it cycle back through this bridge? As I said, this

> defines the same classes as the real log4j jar. One can't have two

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