[jboss-user] [EJB/JBoss] - how to solve the problem:http status 500

[fireflylove]

when you swith the webs very quickly ,you will find the error which is called 
HTTP Status 500 - 

type Exception report
message 
description The server encountered an internal error () that prevented it from fulfilling this request.
exception 
java.lang.NullPointerException
        org.compiere.model.MTab.toString(MTab.java:2282)
        java.lang.String.valueOf(String.java:2577)
        java.lang.StringBuilder.append(StringBuilder.java:116)
        org.compiere.www.WWindowStatus.toString(WWindowStatus.java:75)
        org.compiere.util.WebEnv.getServletInfo(WebEnv.java:659)
        org.compiere.util.WebEnv.addFooter(WebEnv.java:490)
        org.compiere.util.WebUtil.createResponse(WebUtil.java:485)
        org.compiere.util.WebUtil.createErrorPage(WebUtil.java:109)
        org.compiere.www.WWindow.doGet(WWindow.java:143)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
        org.compiere.www.WFilter.doFilter(WFilter.java:142)
        org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.9 logs.

Apache Tomcat/5.5.9


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