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From John Turner <tomcat-u...@johnturner.com>
Subject Re: Exception invoking periodic operation
Date Mon, 28 Jul 2003 19:23:43 GMT

My advice: Tomcat 5 is alpha.  As a newbie, switch to 4.1.24, then see 
if you have the same problem.

John

Moraes, Fabio wrote:

> (I'm not sure if everybody saw this message, so I'm reposting it. Sorry for
> the inconvenience)
> 
> Hello all,
> 
> 	I'm a begginner with Servlets, Tomcat and stuff, so, please, don't
> laff on me ! :)
> 
> 	Scene: I installed Tomcat 5, J2SDK 1.4.2 and MySQL 4.0.13 on a Win2k
> Professional.
> 
> 	While trying some servlets to authenticate users, i get this error
> again and again ...
> 
> SEVERE: Exception invoking periodic operation:
> org.apache.commons.logging.LogConfigurationException:
> org.apache.commons.logging.LogConfigurationExc
> eption: java.lang.IncompatibleClassChangeError:
> org.apache.commons.logging.impl.SimpleLog
>         at
> org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.ja
> va:532)
>         at
> org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.ja
> va:272)
>         at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:414)
>         at
> org.apache.catalina.core.StandardContext.start(StandardContext.java:3849)
>         at
> org.apache.catalina.core.StandardContext.reload(StandardContext.java:2728)
>         at
> org.apache.catalina.core.StandardContext.backgroundProcess(StandardContext.j
> ava:4375)
>         at
> org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processC
> hildren(Conta inerBase.java:1654)
>         at
> org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processC
> hildren(Conta
> inerBase.java:1663)
>         at
> org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processC
> hildren(Conta
> inerBase.java:1663)
>         at
> org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(Cont
> ainerBase.java:1643)
>         at java.lang.Thread.run(Thread.java:534)
> Caused by: org.apache.commons.logging.LogConfigurationException:
> java.lang.IncompatibleClassChangeError:
> org.apache.commons.logging.impl.SimpleLog
>         at
> org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryI
> mpl.java:416)
> 
>         at
> org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.ja
> va:525)
> 
>         ... 10 more
> 
> Caused by: java.lang.IncompatibleClassChangeError:
> org.apache.commons.logging.impl.SimpleLog
>         at
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.jav
> a:1265)
>         at
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.jav
> a:1225)
>         at
> org.apache.commons.logging.impl.LogFactoryImpl$1.run(LogFactoryImpl.java:460
> )
>         at java.security.AccessController.doPrivileged(Native Method)
>         at
> org.apache.commons.logging.impl.LogFactoryImpl.loadClass(LogFactoryImpl.java
> :454)
>         at
> org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryI
> mpl.java:406)
> 
>         ... 11 more
> 
> 	Could anyone help me ?
> 
> Thanks in advance,
> 
> ---
>  Fabio Moraes
>  fabio.moraes@eds.com
>  System Engineer
>  Work Force Management System
>  +55 21 3088 9548
> 
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