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From "Moraes, Fabio" <fabio.mor...@eds.com>
Subject Exception invoking periodic operation
Date Thu, 24 Jul 2003 20:15:19 GMT

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.jav
a:1643)
        at java.lang.Thread.run(Thread.java:534)
Caused by: org.apache.commons.logging.LogConfigurationException:
java.lang.IncompatibleClassChangeEr
ror: 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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