Failed to run on JBoss AS (cluster environment)

Hi All, 
 
I've encountered java.lang.LinkageError when I'm trying to run the sample war (WebViewerExample, the war file comes from the BIRT 2.6.2) with JBoss AS cluster environment. 
 
Application Details: 
a. JBoss AS: 4.2.3.GA (deployed at <jboss>/server/all/deploy) 
b. BIRT Version: 2.6.2 
c. Accessed URL on The Sample War: http://<server>/WebViewerExample/frameset?__report=test.rptdesign&sample=my+parameter 
d. What Have I Changed on WebViewerExample?: Edited web.xml by adding <distributable/> tag 
e. Operating System: Linux 
f. Java Version: 6 
 
Error Stack Trace: 
<pre class='_prettyXprint _lang-auto _linenums:0'>
javax.servlet.ServletException: Servlet execution threw an exception
org.eclipse.birt.report.filter.ViewerFilter.doFilter(ViewerFilter.java:68)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
root cause

java.lang.LinkageError: loader constraint violation: when resolving method "org.eclipse.birt.report.engine.api.impl.ReportRunnable.<init>(Lorg/eclipse/birt/report/engine/api/IReportEngine;Lorg/eclipse/birt/report/model/api/ModuleHandle;)V" the class loader (instance of org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader) of the current class, org/eclipse/birt/report/engine/api/impl/ReportEngineHelper, and the class loader (instance of org/jboss/mx/loading/UnifiedClassLoader3) for resolved class, org/eclipse/birt/report/engine/api/impl/ReportRunnable, have different Class objects for the type org/eclipse/birt/report/model/api/ModuleHandle used in the signature
org.eclipse.birt.report.engine.api.impl.ReportEngineHelper.openReportDesign(ReportEngineHelper.java:273)
org.eclipse.birt.report.engine.api.impl.ReportEngine.openReportDesign(ReportEngine.java:601)
org.eclipse.birt.report.service.ReportEngineService.openReportDesign(ReportEngineService.java:387)
org.eclipse.birt.report.utility.BirtUtility.getRunnableFromDesignFile(BirtUtility.java:607)
org.eclipse.birt.report.context.ViewerAttributeBean.getDesignHandle(ViewerAttributeBean.java:641)
org.eclipse.birt.report.context.ViewerAttributeBean.__init(ViewerAttributeBean.java:224)
org.eclipse.birt.report.context.BaseAttributeBean.init(BaseAttributeBean.java:233)
org.eclipse.birt.report.context.ViewerAttributeBean.<init>(ViewerAttributeBean.java:118)
org.eclipse.birt.report.context.BirtContext.__init(BirtContext.java:44)
org.eclipse.birt.report.context.BaseContext.<init>(BaseContext.java:69)
org.eclipse.birt.report.context.BirtContext.<init>(BirtContext.java:30)
org.eclipse.birt.report.servlet.ViewerServlet.__getContext(ViewerServlet.java:150)
org.eclipse.birt.report.servlet.BirtSoapMessageDispatcherServlet.doGet(BirtSoapMessageDispatcherServlet.java:151)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.eclipse.birt.report.servlet.BirtSoapMessageDispatcherServlet.service(BirtSoapMessageDispatcherServlet.java:122)
org.eclipse.birt.report.filter.ViewerFilter.doFilter(ViewerFilter.java:68)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
</pre>
 
Any ideas on this? Thanks. 
 
 
 
SP

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Comments

JasonW

Can you try not using the war and just copy the WebViewerExample directory in the engine download to the the deploy directory and renaming the directory Birt.war? Or re-war the WebViewerExample directory on that machine?

Jason

rotorjet

Hi Jason,

I copied the "WebViewerExample" directory & renamed it to "WebViewerExample.war" in the engine download to the deploy directory. I've used the same example at my own local's JBoss AS 4.2.3.GA and it's running fine (non-cluster environment, Windows machine).

I've also tested to rename it to "Birt.war" and it's the same error.

However, I've noticed that if I keep hitting the "Refresh" button (browser) several times on accessing the same URL, it "may" get the correct result sometimes. The behaviour is rather odd, but it's definitely hitting the LinkageError for the 1st time I'm accessing it.

SP