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Date: Mon, 25 Oct 2010 11:53:25 -0400 (EDT)
From: "Manuel Innerhofer (JIRA)" <jira@apache.org>
To: clerezza-dev@incubator.apache.org
Subject: [jira] Created: (CLEREZZA-342) Triaxrs: Unregistered providers are
 not removed from CascadingProviders
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Triaxrs: Unregistered providers are not removed from CascadingProviders
-----------------------------------------------------------------------

                 Key: CLEREZZA-342
                 URL: https://issues.apache.org/jira/browse/CLEREZZA-342
             Project: Clerezza
          Issue Type: Bug
            Reporter: Manuel Innerhofer
            Assignee: Manuel Innerhofer


Therefore old instances may be used. The most prominent exception caused by this bug is:

java.lang.NullPointerException
	at org.apache.clerezza.platform.typerendering.GenericGraphNodeMBW.writeTo(GenericGraphNodeMBW.java:141)
	at org.apache.clerezza.platform.typerendering.GenericGraphNodeMBW.writeTo(GenericGraphNodeMBW.java:76)
	at org.apache.clerezza.triaxrs.ResponseProcessor$1.writeTo(ResponseProcessor.java:333)
	at org.apache.clerezza.triaxrs.ResponseProcessor$1.access$200(ResponseProcessor.java:280)
	at org.apache.clerezza.triaxrs.ResponseProcessor$1$3.run(ResponseProcessor.java:313)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:396)
	at org.apache.clerezza.triaxrs.ResponseProcessor$1.writeTo(ResponseProcessor.java:309)
	at org.wymiwyg.wrhapi.osgi.OsgiWebServerFactory$1.service(OsgiWebServerFactory.java:112)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
	at org.eclipse.equinox.http.servlet.internal.ServletRegistration.handleRequest(ServletRegistration.java:90)
	at org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:109)
	at org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:75)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:532)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:453)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:965)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:388)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:187)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:901)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:113)
	at org.eclipse.jetty.server.Server.handle(Server.java:352)
	at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:596)
	at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:1048)
	at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:549)
	at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:211)
	at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:425)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:489)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:436)
	at java.lang.Thread.run(Thread.java:619)

This exception can be reproduced by updating and refreshing the type rendering core bundle and then surfing on any page which renders a GraphNode.

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