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https://issues.apache.org/jira/browse/LOG4J2-204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13627330#comment-13627330
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Ralph Goers commented on LOG4J2-204:
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Let's try this a different way. What are you trying to do? You obviously have
the Log4j 2 API jar because that is where LogManager.getLogger() comes from.
You also have the log4j-to-slf4j jar since that is where
org.apache.logging.slf4j.SLF4JLoggerContext.getLogger() comes from. But why
would you want to route the Log4j API to SLF4J if you don't have the SLF4J jar
on the class path and apparently don't know what it is? Are you simply
including ALL the Log4j jars in your classpath? If so, you cannot do that as
some of them are mutually exclusive. If you want to have Log4j 2 handle your
logging only include the Log4j APi and Log4j Core jars.
> java.lang.NoClassDefFoundError: org/slf4j/spi/LocationAwareLogger
> -----------------------------------------------------------------
>
> Key: LOG4J2-204
> URL: https://issues.apache.org/jira/browse/LOG4J2-204
> Project: Log4j 2
> Issue Type: Bug
> Affects Versions: 2.0-beta4
> Environment: Product Version: NetBeans IDE 7.3 (Build 201302132200)
> Java: 1.7.0_17; Java HotSpot(TM) 64-Bit Server VM 23.7-b01
> Runtime: Java(TM) SE Runtime Environment 1.7.0_17-b02
> System: Windows 7 version 6.1 running on amd64; Cp1250; pl_PL (nb)
> User directory: C:\Users\Wojtek\AppData\Roaming\NetBeans\7.3
> Cache directory: C:\Users\Wojtek\AppData\Local\NetBeans\Cache\7.3
> Reporter: Wojciech Zaręba
> Labels: newbie
> Attachments: error.log
>
>
> Very simple source:
> package loggerimpl;
> import org.apache.logging.log4j.LogManager;
> import org.apache.logging.log4j.Logger;
> public class LoggerImpl {
> private static Logger logg =
> LogManager.getLogger(LoggerImpl.class.getName());
> public static void main(String[] args) {
> logg.info("Pierwsze info");
> logg.debug("Drugi debug");
> logg.warn("Trzeci warning");
> logg.trace("Czwarty trace");
> logg.error("Piąty ERROR");
> logg.fatal("Szósty F A T A L");
> }
> }
> produces error:
> java.lang.NoClassDefFoundError: org/slf4j/spi/LocationAwareLogger
> at
> org.apache.logging.slf4j.SLF4JLoggerContext.getLogger(SLF4JLoggerContext.java:39)
> at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:342)
> at loggerimpl.LoggerImpl.<clinit>(LoggerImpl.java:11)
> Caused by: java.lang.ClassNotFoundException: org.slf4j.spi.LocationAwareLogger
> at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
> at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
> .. 3 more
> Exception in thread "main" Java Result: 1
> I can't find in bins/sources org.slf4j.spi.LocationAwareLogger
> Regards
> Wojciech Zaręba
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