Execution of any OLAP view hangs in 'RendererTag'

Issue:

In JBoss 5.1. upon executing any OLAP View, including the sample 'Profile View', the application server hangs entirely. With INFO level loging the WEB-INFlogsjasperserver.log indicates that the execution reaches the following log statement, but never progresses:

13:29:52,878 INFO  [RendererTag] enter /performance/views/Profile_view/toolbar

Analysis in JConsole shows heap memory usage spiking and remaining high despite standard JAVA_OPT recommendations from install guide.  A jmap heap dump shows that org.jboss.classloader.spi.base.BaseClassLoader has a “domains” member retaining an extraordinary amout of memory.

Resolution:

The problem was a classloading conflict within JBoss configuration.  Modifying JBoss's jboss-classloading.xml file as follows resolved the issue:

<classloading domain="jasperserver-pro" export-all="NON_EMPTY"
              import-all="true" name="jasperserver-pro.war"
              parent-domain="DefaultDomain"
              xmlns="urn:jboss:classloading:1.0">
</classloading>

Ref. Case #00030563