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From "Adrian Trenaman (JIRA)" <j...@apache.org>
Subject [jira] Created: (AMQ-2740) NullPointerException in Web Console when using an existing browser session with a restarted broker instance
Date Wed, 19 May 2010 08:58:22 GMT
NullPointerException in Web Console when using an existing browser session with a restarted
broker instance
-----------------------------------------------------------------------------------------------------------

                 Key: AMQ-2740
                 URL: https://issues.apache.org/activemq/browse/AMQ-2740
             Project: ActiveMQ
          Issue Type: Bug
          Components: Broker
    Affects Versions: 5.3.2
         Environment: Windows
            Reporter: Adrian Trenaman


As per summary above. If you have a browser open to the web console, and create a queue it
works OK. However, if you then restart the broker adn then try and perform an action like
deleting the queue (from the web console) then you'll see the NPE in the broker's log. 

{code}
ERROR | Nested in org.springframework.web.util.NestedServletException: Request processing
failed; nested exception is java.lang.NullPointerException:
java.lang.NullPointerException
        at org.apache.activemq.web.handler.BindingBeanNameUrlHandlerMapping.getHandlerInternal(BindingBeanNameUrlHandlerMapping.java:57)
        at org.springframework.web.servlet.handler.AbstractHandlerMapping.getHandler(AbstractHandlerMapping.java:184)
        at org.springframework.web.servlet.DispatcherServlet.getHandler(DispatcherServlet.java:1057)
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:854)
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807)
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)
        at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:693)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093)
        at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:83)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
        at org.apache.activemq.web.filter.ApplicationContextFilter.doFilter(ApplicationContextFilter.java:81)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
        at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
        at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
        at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
        at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
        at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:726)
        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
        at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206)
        at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
        at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
        at org.mortbay.jetty.Server.handle(Server.java:324)
        at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
        at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:828)
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514)
        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
        at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
        at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:450)

{code} 

I think this has something to do with stale session secrets, and is a consequence of support
that was put in to protect ActiveMQ against CSRF (cross-site request forgery) attacks. The
original CSRF error was alarming; this error, however, is a plain old NPE and we should fix
it.

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