DO NOT REPLY [Bug 30589] New: - java.util.ConcurrentModificationException from RequestUtils

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http://issues.apache.org/bugzilla/show_bug.cgi?id=30589

java.util.ConcurrentModificationException from RequestUtils

           Summary: java.util.ConcurrentModificationException from
                    RequestUtils
           Product: Struts
           Version: 1.1 Final
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: Controller
        AssignedTo: [EMAIL PROTECTED]
        ReportedBy: [EMAIL PROTECTED]


Got this stacktrace from Struts just after my war was deployed on JBoss 3.2.3
under Jetty 4.2.21. Cannot reproduce, has only happened this one time. Hope you
can use this to locate and fix the error.

14:14:05,633 INFO  [PropertyMessageResources] Initializing,
config='org.apache.struts.util.LocalStrings', returnNull=true
14:14:05,633 INFO  [PropertyMessageResources] Initializing,
config='org.apache.struts.action.ActionResources', returnNull=true
14:14:06,141 INFO  [PropertyMessageResources] Initializing,
config='ApplicationResources', returnNull=true
14:14:06,191 WARN  [jetty] WARNING: Exception for /admin/login.do
java.util.ConcurrentModificationException
        at java.util.HashMap$HashIterator.nextEntry(HashMap.java:782)
        at java.util.HashMap$KeyIterator.next(HashMap.java:818)
        at java.util.Collections$6.nextElement(Collections.java:2479)
        at
org.apache.struts.util.RequestUtils.getModulePrefixes(RequestUtils.java:1907)
        at org.apache.struts.util.RequestUtils.getModuleName(RequestUtils.java:1803)
        at org.apache.struts.util.RequestUtils.getModuleName(RequestUtils.java:1788)
        at org.apache.struts.util.RequestUtils.selectModule(RequestUtils.java:1768)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1481)
        at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:358)
        at
org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:294)
        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:567)
        at org.mortbay.http.HttpContext.handle(HttpContext.java:1807)
        at
org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:525)
        at org.mortbay.http.HttpContext.handle(HttpContext.java:1757)
        at org.mortbay.http.HttpServer.service(HttpServer.java:879)
        at org.jboss.jetty.Jetty.service(Jetty.java:456)
        at org.mortbay.http.HttpConnection.service(HttpConnection.java:790)
        at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:961)
        at org.mortbay.http.HttpConnection.handle(HttpConnection.java:807)
        at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:197)
        at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:276)
        at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:511)

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