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

[Gerweck Andy - agerwe]

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 at qos.ch [mailto:logback-user-bounces at 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-
>>
>>
>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> Logback-user mailing list
>> Logback-user at qos.ch
>> http://qos.ch/mailman/listinfo/logback-user
> 

-- 
Ceki Gülcü
Logback: The reliable, generic, fast and flexible logging framework for Java.
http://logback.qos.ch
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