RE: [Springframework-developer] Help!!!

[<jue...@we...>]

Yep, the classloader hierarchy should be the cause. I guess that OC4J =
has its own version of Log4J 1.1.x in the common classpath, combined =
with sticking to the standard J2SE classloader hierarchy that =
prioritizes base libraries - a big no-no for a "friendly" container.

The Servlet spec encourages a classloader hierarchy that prioritizes the =
web app's classloader. Such a problem cannot occur then if you include =
all your libraries in WEB-INF/lib. This is Tomcat 4's default behavior, =
and at least configurable in other containers, e.g. Resin.

So OC4J should offer a configuration setting for the Servlet spec =
classloader hierarchy, but I don't actually know. Consult your =
documentation... ;-) Another but less preferable solution would be to =
exchange OC4J's common Log4J 1.1 JAR with a newer Log4J 1.2 JAR - it =
should be backward compatible.

Juergen


> -----Original Message-----
> From: William G. Thompson, Jr. [mailto:wg...@rc...]=20
> Sent: Tuesday, March 04, 2003 6:22 PM
> To: Kopylenko, Dmitry
> Cc: 'spring-dev-list'
> Subject: Re: [Springframework-developer] Help!!!
>=20
>=20
> Looks like your picking up a different version of log4j=20
> somehow.  You'll=20
> have to understand how the classloader works in OC4J and check your=20
> classpath.
>=20
> Bill
>=20
>=20
> Kopylenko, Dmitry wrote:
> > Gentlemen,
> >=20
> > I'm having trouble deploying simple Spring-enabled web-app=20
> to Oracle's=20
> > OC4J. The problem is with log4j. It works fine in the local copy of=20
> > JBoss. When I try to deploy it on OC4J I get the following:
> >=20
> > 500 Internal Server Error
> > java.lang.VerifyError: (class: org/apache/log4j/LogManager, method:=20
> > <clinit>
> > signature: ()V) Incompatible argument to function
> > 	at org.apache.log4j.Logger.getLogger(Logger.java:85)
> > 	at
> >=20
> com.interface21.web.servlet.HttpServletBean.<init>(HttpServlet
> Bean.java:49)
> > 	at
> >=20
> com.interface21.web.servlet.FrameworkServlet.<init>(FrameworkS
> ervlet.java:47
> > )
> > 	at
> >=20
> com.interface21.web.servlet.ControllerServlet.<init>(Controlle
> rServlet.java:
> > 69)
> > 	at java.lang.Class.newInstance0(Native Method)
> > 	at java.lang.Class.newInstance(Class.java:232)
> > 	at com.evermind[Oracle9iAS (9.0.2.0.0) Containers for
> >=20
> J2EE].server.http.HttpApplication.loadServlet(HttpApplication.
> java:1645)
> > 	at com.evermind[Oracle9iAS (9.0.2.0.0) Containers for
> >=20
> J2EE].server.http.HttpApplication.findServlet(HttpApplication.
> java:4006)
> > 	at com.evermind[Oracle9iAS (9.0.2.0.0) Containers for
> >=20
> J2EE].server.http.HttpApplication.getDefaultDispatcher(HttpApp
> lication.java:
> > 2559)
> > 	at com.evermind[Oracle9iAS (9.0.2.0.0) Containers for
> >=20
> J2EE].server.http.HttpApplication.getRequestDispatcher(HttpApp
> lication.java:
> > 2308)
> > 	at com.evermind[Oracle9iAS (9.0.2.0.0) Containers for
> >=20
> J2EE].server.http.HttpRequestHandler.processRequest(HttpReques
> tHandler.java:
> > 585)
> > 	at com.evermind[Oracle9iAS (9.0.2.0.0) Containers for
> >=20
> J2EE].server.http.HttpRequestHandler.run(HttpRequestHandler.java:243)
> > 	at com.evermind[Oracle9iAS (9.0.2.0.0) Containers for
> > J2EE].util.ThreadPoolThread.run(ThreadPoolThread.java:64)
> >=20
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> ++++++++++++++
> > ++++++++++++++++++++++++++++++++++++++++++++++
> >=20
> > I am stuck. Any ideas would be appreciated.
> >=20
> > Thanks.
> >=20
> > Dmitriy.
> >=20
>=20
>=20
>=20
>=20
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>=20