LinkageError during specj running

[clebert.suconic]

We are seeing this error during Specj running with JBoss-4.0.2, due to this change on the default ClassLoader for Tomcat:


http://jira.jboss.com/jira/browse/JBAS-1691

The error:

java.lang.LinkageError: loader constraints violated when linking
org/spec/jappserver/common/DeliveryInfo class
 at
org.spec.jappserver.supplier.web.SupplierDomainServlet.doPost(SupplierDo
mainServlet.java:247)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
 at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
tionFilterChain.java:252)
 at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
erChain.java:173)
 at
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilte
r.java:81)
 at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
tionFilterChain.java:202)
 at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
erChain.java:173)
 at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
e.java:213)
 at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv
e.java:178)
 at
org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipa
lValve.java:39)
 at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAs
sociationValve.java:153)
 at
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.j
ava:59)
 at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
:126)
 at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
:105)
 at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
java:107)
 at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:1
48)
 at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:85
6)
 at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processC
onnection(Http11Protocol.java:744)
 at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint
.java:527)
 at
org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorker
Thread.java:112)
 at java.lang.Thread.run(Thread.java:534)

A workaround for this is to change UseJBossWebLoader back to true.

Basically you will have to change this file:

jboss-4.0.2/server/default/deploy/jbossweb-tomcat55.sar/META-INF/jboss-s
ervice.xml

Setting the UseJbossWebLoader back to true:

<attribute name="UseJBossWebLoader">true</attribute>

This is happening because util.jar is defined in the EAR, and some of the WEB classes (Servlets) are using classes defined at the EAR level.

I don't know if I should fix some classloader hierarchy for having this working, but I will have to investigate it. For now this workaroun works just fine.


Clebert Suconic