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https://jira.qos.ch/browse/SLF4J-384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18203#comment-18203
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Jeremy Landis commented on SLF4J-384:
-------------------------------------
This issue should be closed. If anything maybe mention in slf4j document what
to use from log4j2 team to integrate well if that isn't there already. I do
find this to be a trival issue and user should have did a bit more research
before opening a ticket.
> Implement slf4j to log4j2 bridge/adapter/impl
> ---------------------------------------------
>
> Key: SLF4J-384
> URL: https://jira.qos.ch/browse/SLF4J-384
> Project: SLF4J
> Issue Type: New Feature
> Reporter: John Tal
> Assignee: SLF4J developers list
> Priority: Minor
>
> Sorry if this is a dumb question. But I cannot find how slf4j would integrate
> on top of log4j2.
> I have tried using slf4j 1.7.21 with log4j 2.7 and keep running into this:
> Failed to instantiate SLF4J LoggerFactory Reported exception:
> java.lang.NoClassDefFoundError: org/apache/log4j/Level at
> org.slf4j.LoggerFactory.bind(LoggerFactory.java:150) at
> org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:124)
> From what I can see, LoggerFactory is bound to log4j pre 2.0 as there is no
> .logging. in the package names: package org.slf4j.impl; import
> org.apache.log4j.Level; import org.slf4j.ILoggerFactory; import
> org.slf4j.LoggerFactory; import org.slf4j.helpers.Util; import
> org.slf4j.spi.LoggerFactoryBinder; /** * The binding of {@link LoggerFactory}
> class with an actual instance of * {@link ILoggerFactory} is performed using
> information returned by this class. * * @author Ceki Gülcü */
> public class StaticLoggerBinder implements LoggerFactoryBinder {
> If I want log4j2, and don't want to be locked into API, I can't use slf4j. I
> have to go back to commons-logging (JCL). Seems like a waste because JCL and
> it's class loader / config confusion is what led to creation of slf4j. I'd
> rather keep on using slf4j and plug into whatever is the fastest logging
> framework at the time. From all the stats I see today, that is log4j2.
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