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bljohnson
 Post subject: Log4JLogger does not implement Log
PostPosted: Wed Jul 28, 2004 6:23 pm 
Newbie

Joined: Wed Jul 28, 2004 6:13 pm
Posts: 12
I'm using Hibernate 2.1.4. I got the quickstart to work successfully under Tomcat 5. I'm now attempting to use Hibernate in an existing web application I have (that runs under Jetty instead of Tomcat). I'm getting the following error when it tries to start the HibernateUtil class (a servlet that loads at startup similar to the quickstart example):

Code:
java.lang.ExceptionInInitializerError
        at com.li.wedge.soap.HibernateUtil.<clinit>(HibernateUtil.java:30)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
        at java.lang.Class.newInstance0(Class.java:308)
        at java.lang.Class.newInstance(Class.java:261)
        at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:176)
        at org.mortbay.jetty.servlet.ServletHolder.start(ServletHolder.java:215)
        at org.mortbay.jetty.servlet.ServletHandler.initializeServlets(ServletHandler.java:445)
        at org.mortbay.jetty.servlet.WebApplicationHandler.initializeServlets(WebApplicationHandler.java:150)
        at org.mortbay.jetty.servlet.WebApplicationContext.start(WebApplicationContext.java:449)
        at org.mortbay.http.HttpServer.start(HttpServer.java:663)
        at com.li.wedge.modules.AxisModule.run(AxisModule.java:71)
        at java.lang.Thread.run(Thread.java:534)
Caused by: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: Class org.apache.commons.logging.impl.Log4JLogger does not implement Log
        at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:532)
        at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:272)
        at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:246)
        at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:395)
        at net.sf.hibernate.cfg.Configuration.<clinit>(Configuration.java:91)
        ... 15 more
Caused by: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: Class org.apache.commons.logging.impl.Log4JLogger does not implement Log
        at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:416)
        at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:525)
        ... 19 more
Caused by: org.apache.commons.logging.LogConfigurationException: Class org.apache.commons.logging.impl.Log4JLogger does not implement Log
        at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:412)
        ... 20 more


I suspect there is some classloader issue related to Log4J? Has anyone seen this issue. I searched the forums with no luck. Here is a copy of my hibernate.cfg.xml file:

Code:
<hibernate-configuration>

    <session-factory>

        <property name="hibernate.dbcp.driverClassName">com.mysql.jdbc.Driver</property>
        <property name="hibernate.dbcp.username">myuser</property>
        <property name="hibernate.dbcp.password">mypass</property>
        <property name="hibernate.dbcp.url">jdbc:mysql://localhost/wedge</property>

        <property name="show_sql">false</property>
        <property name="dialect">net.sf.hibernate.dialect.MySQLDialect</property>

        <!-- Mapping files -->
        <mapping resource="users.hbm.xml"/>
        <mapping resource="items.hbm.xml"/>
        <mapping resource="actions.hbm.xml"/>

    </session-factory>

</hibernate-configuration>
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bljohnson
 Post subject:
PostPosted: Wed Jul 28, 2004 7:05 pm 
Newbie

Joined: Wed Jul 28, 2004 6:13 pm
Posts: 12
I think I answered my own question. My web application uses Axis which has a commons-logger jar file in WEB-INF/lib. I didn't notice that before. I removed it and replaced it with the Apache commons jars shipped with Hibernate and I'm not longer getting the error.
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bljohnson
 Post subject:
PostPosted: Fri Jul 30, 2004 10:36 am 
Newbie

Joined: Wed Jul 28, 2004 6:13 pm
Posts: 12
OK this problem has cropped up again. I fixed a NoClassDefFound exception for commons-discovery and now I'm getting this log4j error again. I've checked the classpath and there doesnt seem to be any older stale versions of commons-logging.jar anywhere. I'm using the commons-logging-1.0.3 thats shipped with hibernate.

Any ideas?
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