Hi,
   DSpace / Tomcat has suddenly decided that it can't compile a class 
and produces the following stack dump.

javax.servlet.ServletException: Unable to compile class for JSP
         at 
org.dspace.utils.servlet.DSpaceWebappServletFilter.doFilter(DSpaceWebappServletFilter.java:119)
         at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
         at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
         at 
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:691)
         at 
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:469)
         at 
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:403)
         at 
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
         at 
org.dspace.app.webui.servlet.HandleServlet.doDSGet(HandleServlet.java:286)
         at 
org.dspace.app.webui.servlet.DSpaceServlet.processRequest(DSpaceServlet.java:151)
         at 
org.dspace.app.webui.servlet.DSpaceServlet.doGet(DSpaceServlet.java:99)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
         at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
         at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
         at 
org.dspace.utils.servlet.DSpaceWebappServletFilter.doFilter(DSpaceWebappServletFilter.java:112)
         at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
         at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
         at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210)
         at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
         at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
         at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
         at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
         at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
         at 
org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
         at 
org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
         at 
org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:775)
         at 
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:704)
         at 
org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:897)
         at 
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685)
         at java.lang.Thread.run(Thread.java:662)

Has anyone encountered this or has any suggestions on possible causes?  
I suspect the OS (Red Hat Enterprise 5) has updated something vital but 
can't see what it is from the error.

Regards,
   Jason Cooper


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