RE: [logback-user] Unable to Initialize Logger in JDK1.4

3 May 2007

      This seems like a sound solution, but if you can live with JMX 1.2.1, you could also just require Java 1.4 users to include a JMX implementation. Though I can't see any problems with this solution, I'm personally never too keen to see Class.forName in a general library after seeing the problems of applications like commons-logging, especially given the problems it can create in distributed systems.

-Andy Gerweck

-----Original Message-----
From: logback-user-bounces@qos.ch [mailto:logback-user-bounces@qos.ch] On Behalf Of Ceki Gulcu
Sent: Thursday, May 03, 2007 11:34 AM
To: logback users list
Subject: Re: [logback-user] Unable to Initialize Logger in JDK1.4

I am happy to report that this problem has been fixed in commit r1520.
For more details see [1]. It should be available with the next
version of logback, namely 0.9.6.

[1] http://www.qos.ch/pipermail/logback-dev/2007-May/001915.html

Ceki Gulcu wrote:
...
Hi Brian,
Raphael and I spent a few minutes studying your bug report.
Placing slf4j-jdk14-1.3.0.jar makes the problem harder to reproduce 
because if slf4j-jdk14-1.3.0.jar comes before 
logback-classic-0.9.5-jdk14.jar, then logback classes cannot be seen by 
SLF4J API.
Removing slf4j-jdk14-1.3.0.jar is necessary but not sufficient to 
reproduce the problem. You also need a logback-test.xml or logback.xml 
file available somewhere on the class path. When these conditions are 
fulfilled, then we observe the NoClassDefFoundError you reported which 
can be explained as follows.
We recently added a new component to Joran, namely 
JMXConfiguratorAction, which requires JMX support (available in JDK 
1.5). When logback is loaded into memory, it will check whether the 
aforementioned configuration files are available on the class path. If 
so, logback will create an instance of Joran to parse the config file. 
However, to load Joran one needs JMXConfiguratorAction which in turn 
requires JMX, hence the exception.
We can attempt to fix this bug by loading JMXConfiguratorAction only 
under JDK 1.5. We'll let you know how it goes.
Thanks for using logback.
Brian Suksomwong wrote:
...
Hey all,
I'm trying to test logback's JDK1.4 support, but am receiving a 
NoClassDefNotFoundException when running my test class.
Test Class:
import org.slf4j.Logger;
import org.slf4j.LoggerFactory ;
public Test {
  public static void main(String args[]) {
    Logger log = LoggerFactory.getLogger(Test.class);
    System.out.prinln(log.getName());
  }
}
My classpath includes:
logback-classic-0.9.5-jdk14.jar
logback-core-0.9.5-jdk14.jar
slf4j-api-1.3.0.jar
slf4j-jdk14-1.3.0.jar (just in case, but I receive the same error 
without it)
When I try to run the class I receive the following stack trace:
java.lang.NoClassDefFoundError : javax/management/ObjectName
at 
ch.qos.logback.classic.joran.JoranConfigurator.addInstanceRules(JoranConfigurator.java:62)
at 
ch.qos.logback.core.joran.GenericConfigurator.buildInterpreter(GenericConfigurator.java 
:83)
at 
ch.qos.logback.core.joran.JoranConfiguratorBase.buildInterpreter(JoranConfiguratorBase.java:82)
at 
ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:95)
at ch.qos.logback.core.joran.GenericConfigurator.doConfigure 
(GenericConfigurator.java:74)
at 
ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:38)
at 
ch.qos.logback.classic.util.ContextInitializer.configureByResource(ContextInitializer.java 
:24)
at 
ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:35)
at 
ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:46)
at org.slf4j.impl.StaticLoggerBinder.initialize 
(StaticLoggerBinder.java:52)
at org.slf4j.impl.StaticLoggerBinder.<init>(StaticLoggerBinder.java:44)
at org.slf4j.impl.StaticLoggerBinder.<clinit>(StaticLoggerBinder.java:39)
at org.slf4j.LoggerFactory .<clinit>(LoggerFactory.java:57)
at Test.main(Test.java:6)
... Removed 21 stack frames
The javax/management package is not in JDK1.4, but is in JDK1.5.  I 
think there is a binding issue happening; please help me solve this 
issue if possible.
Thanks!
-B-
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Ceki Gülcü
Logback: The reliable, generic, fast and flexible logging framework for Java.
http://logback.qos.ch
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RE: [logback-user] Unable to Initialize Logger in JDK1.4

Gerweck Andy - agerwe