Bugs item #840885, was opened at 2003-11-12 10:37
Message generated for change (Comment added) made by starksm
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=376685&aid=840885&group_id=22866
Category: JBossServer
Group: v3.2
Status: Open
Resolution: None
Priority: 5
Submitted By: Adrian Price (adrianprice)
Assigned to: Scott M Stark (starksm)
Summary: UnifiedClassLoader3 is not threadsafe
Initial Comment:
I'm getting an intermittent j.l.ClassCastException on the
dynamic proxy returned by JNDI lookup of an EJB local
home. A single copy of the EJBLocalHome subinterface
in question is deployed in an ejb.jar inside an .ear with
an application-scoped ClassLoader. No other copies of
the class file are deployed anywhere else.
Application level debug output (attached) shows clearly
that the same application-scoped UnifiedClassLoader3
instance associated with the ear file has loaded the
same bytecode twice, into two distinct copies of the
same class, with the result that the dynamic proxy
implements a different copy of the home interface than
that which the calling code sees. Hence the
ClassCastException. Both copies of the class share the
same ClassLoader instance.
This is JBoss-3.2.2, and I've seen the same problem on
both Linux and Windows XP.
----------------------------------------------------------------------
>Comment By: Scott M Stark (starksm)
Date: 2003-11-12 11:08
Message:
Logged In: YES
user_id=175228
It would be useful to see the trace level log output of this
scenario. Add the following config to the conf/log4j.xml file
to create a separate ucl.log:
<appender name="UCL" class="org.apache.log4j.FileAppender">
<param name="File"
value="${jboss.server.home.dir}/log/ucl.log"/>
<param name="Append" value="false"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern"
value="[%r,%c{1},%t] %m%n"/>
</layout>
</appender>
<category name="org.jboss.mx.loading" additivity="false">
<priority value="TRACE" class="org.jboss.logging.XLevel"/>
<appender-ref ref="UCL"/>
</category>
Zip that up and mail it to [EMAIL PROTECTED] as its
unlikely to fit the file size attachment restrictions of
sourceforge.
----------------------------------------------------------------------
Comment By: Scott M Stark (starksm)
Date: 2003-11-12 10:50
Message:
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There is no debug output attached, make sure you check the
'Check to Upload and Attach a File:' box below.
----------------------------------------------------------------------
Comment By: Adrian Price (adrianprice)
Date: 2003-11-12 10:49
Message:
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user_id=580837
Detailed diagnostics and commentary attached.
----------------------------------------------------------------------
You can respond by visiting:
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