org.apache.jasper.JasperException: org.hibernate.HibernateException: Could not parse configuration: /ormmapping/COLOMBOTODAY.cfg.xmll

this exception gives me sometimes in a web application on tomcat server, please help me to resolve this problem.

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: org.hibernate.HibernateException: Could not parse configuration: /ormmapping/COLOMBOTODAY.cfg.xml
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:498)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
root cause

javax.servlet.ServletException: org.hibernate.HibernateException: Could not parse configuration: /ormmapping/COLOMBOTODAY.cfg.xml
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:841)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:774)
org.apache.jsp.index_jsp._jspService(index_jsp.java:866)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
root cause

org.orm.PersistentException: org.hibernate.HibernateException: Could not parse configuration: /ormmapping/COLOMBOTODAY.cfg.xml
model.NewsFactory.listNewsByQuery(NewsFactory.java:91)
org.apache.jsp.index_jsp._jspService(index_jsp.java:201)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
root cause

org.hibernate.HibernateException: Could not parse configuration: /ormmapping/COLOMBOTODAY.cfg.xml
org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1494)
org.hibernate.cfg.Configuration.configure(Configuration.java:1428)
org.orm.PersistentManager.<init>(PersistentManager.java:64)
model.COLOMBOTODAYPersistentManager.<init>(COLOMBOTODAYPersistentManager.java:30)
model.COLOMBOTODAYPersistentManager.instance(COLOMBOTODAYPersistentManager.java:40)
model.NewsFactory.listNewsByQuery(NewsFactory.java:86)
org.apache.jsp.index_jsp._jspService(index_jsp.java:201)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
root cause

org.dom4j.DocumentException: Error on line 16 of document : The entity name must immediately follow the '&' in the entity reference. Nested exception: The entity name must immediately follow the '&' in the entity reference.
org.dom4j.io.SAXReader.read(SAXReader.java:482)
org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1484)
org.hibernate.cfg.Configuration.configure(Configuration.java:1428)
org.orm.PersistentManager.<init>(PersistentManager.java:64)
model.COLOMBOTODAYPersistentManager.<init>(COLOMBOTODAYPersistentManager.java:30)
model.COLOMBOTODAYPersistentManager.instance(COLOMBOTODAYPersistentManager.java:40)
model.NewsFactory.listNewsByQuery(NewsFactory.java:86)
org.apache.jsp.index_jsp._jspService(index_jsp.java:201)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.30 logs.

Apache Tomcat/5.5.30

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this is not permanent error it gives two three hours per day.

what do you mean with "sometimes" ?
did you check the file syntax is correct?