Hello
I have a problem with log4j and commons-logging which i really hope anybody
can help me with.
Setup:
Windows 2000, Apache Tomcat 6.0, JRE 1.6.0_02, log4j-1.2.15, commons-logging
annd i am using eclipse 3.3.0
Since i have multiple Web services on the same Tomcat server i have been
putting log4j.jar in WEB-INF/lib and log4j.properties in WEB-INF/classes.
My problem is some kind of class-loading problem where log4j and
commons-logging won't find each other.
2 scenarios:
1) commons-logging.jar and log4j.jar are both put in WEB-INF/lib for my
webapp.
2) commons-logging.jar is put in tomcat 6.0/lib (Common classloader according
to tomcat 6.0 doc) and log4j.jar in WEB-INF/lib.
The stacktraces of both scenarios are given below.
Question is: Why can't they see each other and how can i solve the problem ?
Can it really be so that i have to wrap the log4j class (as describe in the
log4j book) and can someone explain why and will it help ?
Any feed back or solution hints are really appreciated :-)
Thx
Jon Friis
Scenario 1)
--------------------------------------------------
25-10-2007 16:47:24 org.apache.catalina.core.StandardContext loadOnStartup
SEVERE: Servlet /FAS threw load() exception
java.lang.NoClassDefFoundError: org.apache.commons.logging.LogFactory
at
org.apache.axis.components.logger.LogFactory.class$(LogFactory.java:45)
at
org.apache.axis.components.logger.LogFactory$1.run(LogFactory.java:45)
at java.security.AccessController.doPrivileged(Native Method)
at
org.apache.axis.components.logger.LogFactory.getLogFactory(LogFactory.java:41)
at
org.apache.axis.components.logger.LogFactory.<clinit>(LogFactory.java:33)
at
org.apache.axis.transport.http.AxisServlet.<clinit>(AxisServlet.java:75)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at
org.apache.axis.transport.http.AxisServletBase.class$(AxisServletBase.java:59)
at
org.apache.axis.transport.http.AxisServletBase.<clinit>(AxisServletBase.java:58)
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:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1104)
at
org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:981)
at
org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4042)
at
org.apache.catalina.core.StandardContext.start(StandardContext.java:4348)
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at
org.apache.catalina.core.StandardService.start(StandardService.java:516)
at
org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:566)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
25-10-2007 16:47:25 org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
Scenario 2)
--------------------------------------------------
java.lang.NoClassDefFoundError: org/apache/log4j/Category
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
at java.lang.Class.getConstructor0(Class.java:2699)
at java.lang.Class.getConstructor(Class.java:1657)
at
org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:410)
at
org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:529)
at
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:235)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:370)
at
org.apache.axis.components.logger.LogFactory.getLog(LogFactory.java:37)
at
org.apache.axis.transport.http.AxisServlet.<clinit>(AxisServlet.java:75)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at
org.apache.axis.transport.http.AxisServletBase.class$(AxisServletBase.java:59)
at
org.apache.axis.transport.http.AxisServletBase.<clinit>(AxisServletBase.java:58)
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:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1104)
at
org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:981)
at
org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4042)
at
org.apache.catalina.core.StandardContext.start(StandardContext.java:4348)
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at
org.apache.catalina.core.StandardService.start(StandardService.java:516)
at
org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:566)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
25-10-2007 17:02:14 org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
--
Jon Friis
IT-Consultant & Owner
Gavia Technologies ApS
Omøgade 8, 2. sal
2100 Kbh. Ø
M: +45 23820053
E: jon_at_gavia.dk
W: www.gavia.dk
Join my network at
http://www.linkedin.com/in/jonfriis
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