java.lang.StackOverflowErrorjavax.servlet.ServletException: java.lang.StackOverflowError at org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:898) at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:827) at org.apache.jsp.index_jsp._jspService(index_jsp.java:64) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:73) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:378) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:120) at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:242) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:201) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:563) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:163) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:108) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:556) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:402) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:249) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:267) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:245) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:260) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) Caused by: java.lang.StackOverflowError at org.springframework.web.util.NestedServletException.getCause(NestedServletException.java:69) at javax.servlet.ServletException.getRootCause(ServletException.java:96) at org.springframework.web.util.NestedServletException.getCause(NestedServletException.java:69) at javax.servlet.ServletException.getRootCause(ServletException.java:96) at org.springframework.web.util.NestedServletException.getCause(NestedServletException.java:69) at javax.servlet.ServletException.getRootCause(ServletException.java:96) at org.springframework.web.util.NestedServletException.getCause(NestedServletException.java:69) at javax.servlet.ServletException.getRootCause(ServletException.java:96) at org.springframework.web.util.NestedServletException.getCause(NestedServletException.java:69) at javax.servlet.ServletException.getRootCause(ServletException.java:96) at org.springframework.web.util.NestedServletException.getCause(NestedServletException.java:69) at javax.servlet.ServletException.getRootCause(ServletException.java:96) at org.springframework.web.util.NestedServletException.getCause(NestedServletException.java:69) at javax.servlet.ServletException.getRootCause(ServletException.java:96) at org.springframework.web.util.NestedServletException.getCause(NestedServletException.java:69) at javax.servlet.ServletException.getRootCause(ServletException.java:96) at org.springframework.web.util.NestedServletException.getCause(NestedServletException.java:69) at javax.servlet.ServletException.getRootCause(ServletException.java:96) at org.springframework.web.util.NestedServletException.getCause(NestedServletException.java:69) at javax.servlet.ServletException.getRootCause(ServletException.java:96) at org.springframework.web.util.NestedServletException.getCause(NestedServletException.java:69) at javax.servlet.ServletException.getRootCause(ServletException.java:96) at org.springframework.web.util.NestedServletException.getCause(NestedServletException.java:69) at javax.servlet.ServletException.getRootCause(ServletException.java:96) at org.springframework.web.util.NestedServletException.getCause(NestedServletException.java:69) at javax.servlet.ServletException.getRootCause(ServletException.java:96) at org.springframework.web.util.NestedServletException.getCause(NestedServletException.java:69) at javax.servlet.ServletException.getRootCause(ServletException.java:96) at org.springframework.web.util.NestedServletException.getCause(NestedServletException.java:69) at javax.servlet.ServletException.getRootCause(ServletException.java:96) at org.springframework.web.util.NestedServletException.getCause(NestedServletException.java:69) at javax.servlet.ServletException.getRootCause(ServletException.java:96) at org.springframework.web
...and more like that.

Maybe of interest: JRE6/JDK1.6.0_21

Any ideas?