Re: [jetty-user] Re: ClassCastException...Jetty6Continuation when hot deploying

Greetings,

This mailing list is alive, although the [email protected] mailing list
is more active. Jetty 6 is currently in maintenance release state with no
new development being done, and significant number of the community members
have migrated to the Jetty 7.x releases and to the Eclipse mailing list.

Could you please try running your code with the latest version of Jetty 6,
that you can download from http://dist.codehaus.org/jetty/jetty-6.1.26/? If
the problem continues to occur with the latest version of Jetty 6, please
open a ticket in JIRA.

Thanks,
Michael


On Wed, May 4, 2011 at 5:29 PM, Sean Rhea <[email protected]> wrote:

> Wow.  Crickets.  Is this mailing list dead?
>
> Sean
>
>
>
> On Wed, Apr 20, 2011 at 10:42 AM, Sean Rhea <[email protected]> wrote:
> > Hello,
> >
> > I'm using jetty 6.1.22 with cometd-java-server-2.1.0 and
> > jetty-continuation-7.3.0.v20110203.  I hot deploy my app using a
> > WebAppContext, but when I touch the context file, the next attempt by
> > a cometd client causes this error:
> >
> > java.lang.ClassCastException:
> org.eclipse.jetty.continuation.Jetty6Continuation
> >        at
> org.eclipse.jetty.continuation.ContinuationFilter.doFilter(ContinuationFilter.java:76)
> >        at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> >        ...
> >        (full stack trace below)
> >
> > Line 76 of ContinuationFilter.java is trying to cast the continuation
> > to type Continuation, which Jetty6Continuation inherits, so it should
> > work.  I suspect the problem is with the class loader, in that the
> > Jetty6Continuation object in hand is from the class loader used before
> > the restart, whereas the Continuation interface being used is the one
> > from after the restart.  If that were the case, then in fact the
> > exception is the expected behavior.  To try and fix it, I added
> >
> >  <Set name="systemClasses">
> >    <Array type="java.lang.String">
> >      <Item>org.eclipse.jetty.</Item>
> >      ...
> >    </Array>
> >  </Set>
> >
> > to my context.xml, so that the Continuation interface and
> > Jetty6Continuation class would be loaded by the system class loader,
> > but that doesn't seem to have helped--I still get the exception.
> >
> > Has anyone else seen this?  Any ideas?  The full text of my web
> > context is below.
> >
> > Thanks,
> > Sean
> >
> > nmr.xml (my web context):
> >
> > <?xml version="1.0"  encoding="ISO-8859-1"?>
> > <!DOCTYPE Configure PUBLIC "-//Mort Bay Consulting//DTD Configure//EN"
> > "http://jetty.mortbay.org/configure.dtd">
> > <Configure class="org.mortbay.jetty.webapp.WebAppContext">
> >  <Set name="contextPath">/</Set>
> >  <Set name="war"><SystemProperty name="jetty.home"
> > default="."/>/webapps/nmr</Set>
> >  <!-- <Set name="extractWAR">true</Set> -->
> >  <Get name="errorHandler">
> >    <Call name="setShowStacks">
> >      <Arg type="boolean">false</Arg>
> >    </Call>
> >  </Get>
> >  <Set name="copyWebDir">true</Set>
> >  <Set name="systemClasses">
> >    <Array type="java.lang.String">
> >      <Item>java.</Item>
> >      <Item>javax.</Item>
> >      <Item>org.eclipse.jetty.</Item>
> >      <Item>org.mortbay.</Item>
> >      <Item>org.xml.</Item>
> >      <Item>org.w3c.</Item>
> >      <Item>org.srhea.scalaqlite.</Item>
> >      <Item>scala.</Item>
> >    </Array>
> >  </Set>
> > </Configure>
> >
> > web.xml:
> >
> > <web-app>
> >  <servlet>
> >    <servlet-name>cometd</servlet-name>
> >    <servlet-class>org.cometd.server.CometdServlet</servlet-class>
> >    <load-on-startup>1</load-on-startup>
> >    <init-param>
> >      <param-name>timeout</param-name>
> >      <param-value>60000</param-value>
> >    </init-param>
> >    <init-param>
> >      <param-name>logLevel</param-name>
> >      <param-value>3</param-value>
> >    </init-param>
> >  </servlet>
> >  <servlet-mapping>
> >    <servlet-name>cometd</servlet-name>
> >    <url-pattern>/cometd/*</url-pattern>
> >  </servlet-mapping>
> >
> >  <servlet>
> >    <servlet-name>initializer</servlet-name>
> >    <servlet-class>BayeuxInitializer</servlet-class>
> >    <load-on-startup>3</load-on-startup>
> >  </servlet>
> >
> >  <filter>
> >    <filter-name>continuation</filter-name>
> >
>  <filter-class>org.eclipse.jetty.continuation.ContinuationFilter</filter-class>
> >  </filter>
> >  <filter-mapping>
> >    <filter-name>continuation</filter-name>
> >    <url-pattern>/cometd/*</url-pattern>
> >  </filter-mapping>
> >
> >  <servlet>
> >   <servlet-name>NmrServlet</servlet-name>
> >   <servlet-class>NmrServlet</servlet-class>
> >   <load-on-startup>2</load-on-startup>
> >  </servlet>
> >  <servlet-mapping>
> >   <servlet-name>NmrServlet</servlet-name>
> >   <url-pattern>/*</url-pattern>
> >  </servlet-mapping>
> > </web-app>
> >
> > full stack trace:
> >
> > java.lang.ClassCastException:
> org.eclipse.jetty.continuation.Jetty6Continuation
> >        at
> org.eclipse.jetty.continuation.ContinuationFilter.doFilter(ContinuationFilter.java:76)
> >        at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> >        at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
> >        at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> >        at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
> >        at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> >        at
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
> >        at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> >        at org.mortbay.jetty.Server.handle(Server.java:326)
> >        at
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
> >        at
> org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:398)
> >        at
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
> >        at
> org.mortbay.jetty.nio.SelectChannelConnector$RetryContinuation.run(SelectChannelConnector.java:525)
> >        at
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
> >
> > --
> > Construct the world in which you want to live.  Then live there.
> >
>
>
>
> --
> Construct the world in which you want to live.  Then live there.
>
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