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From "Julian Sedding (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FELIX-3104) Registering/unregistering HttpService with CometdServiceImpl repeatedly causes ClassCastException
Date Fri, 02 Oct 2015 09:21:27 GMT

    [ https://issues.apache.org/jira/browse/FELIX-3104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14940943#comment-14940943

Julian Sedding commented on FELIX-3104:

[~cziegeler] I don't know. I have not used Cometd since 2011. I'm fine with closing this issue.
If someone stumbles over the same issue, it can always be re-opened.

> Registering/unregistering HttpService with CometdServiceImpl repeatedly causes ClassCastException
> -------------------------------------------------------------------------------------------------
>                 Key: FELIX-3104
>                 URL: https://issues.apache.org/jira/browse/FELIX-3104
>             Project: Felix
>          Issue Type: Bug
>          Components: HTTP Service
>    Affects Versions: http-2.2.0
>            Reporter: Julian Sedding
>            Assignee: Felix Meschberger
>            Priority: Minor
>         Attachments: FELIX-3104-fmeschbe.patch, FELIX-3104.patch
> CometdServiceImpl uses org.mortbay.cometd.continuation.ContinuationCometdServlet in its
implementation, which in turn extends org.mortbay.cometd.AbstractCometdServlet. AbstractCometdServlet
places a Bayeux object in a servlet context attribute in its init() method, but never cleans
it up on destroy(). This can lead to a ClassCastException if the servlet's init() method is
called repeatedly, and the ClassLoader used to create the object stored in the servlet context
attribute is not the same that was used to load the AbstractCometdServlet class. However,
this is what seems to happen if the cometd bundle is restarted (may only be the case with
the patch from FELIX-3102 applied).

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