Hi, I'm using Spring 2.x integration with jboss JMX server version 4.2.2.GA and so far it worked great to publish my spring beans as MBeans. However, there is 1 thing I don't get, I have setup a JMX operation method with parameters that accepts java.lang.Long types. That works fine as long as I don't supply a null value. Can anybody enlighten me on how I can make the parameter optional ? Here's the stacktrace I get: java.lang.NumberFormatException: For input string: "" | java.lang.NumberFormatException.forInputString(NumberFormatException.java:48) | java.lang.Long.parseLong(Long.java:424) | java.lang.Long.valueOf(Long.java:518) | sun.beans.editors.LongEditor.setAsText(LongEditor.java:24) | org.jboss.util.propertyeditor.PropertyEditors.convertValue(PropertyEditors.java:260) | org.jboss.jmx.adaptor.control.Server.invokeOpByName(Server.java:239) | org.jboss.jmx.adaptor.control.Server.invokeOp(Server.java:223) | org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.invokeOp(HtmlAdaptorServlet.java:262) | org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.processRequest(HtmlAdaptorServlet.java:100) | org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.doPost(HtmlAdaptorServlet.java:82) | javax.servlet.http.HttpServlet.service(HttpServlet.java:710) | javax.servlet.http.HttpServlet.service(HttpServlet.java:803) | org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) | | Thank you, -Guillaume View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4185184#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...