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https://issues.apache.org/jira/browse/AMQ-4807?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Claus Ibsen resolved AMQ-4807.
------------------------------
Resolution: Cannot Reproduce
> Chat demo - May cause NPE when disconnecting clients
> ----------------------------------------------------
>
> Key: AMQ-4807
> URL: https://issues.apache.org/jira/browse/AMQ-4807
> Project: ActiveMQ
> Issue Type: Bug
> Affects Versions: 5.9.0
> Reporter: Claus Ibsen
> Assignee: Claus Ibsen
> Priority: Minor
> Fix For: 5.10.0
>
>
> After testing the 5.9 RC I played with the various demos, and the chat demo.
> I opened a 2nd browser to login with a 2nd user, and did some chat.
> I noticed in my console these WARN logs. Not sure if they happened when I
> disconnected a client, or something.
> {code}
> WARN | /demo/amq
> java.lang.NullPointerException
> at
> org.apache.activemq.web.MessageListenerServlet.doMessages(MessageListenerServlet.java:381)
> at
> org.apache.activemq.web.MessageListenerServlet.doGet(MessageListenerServlet.java:250)
> at org.apache.activemq.web.AjaxServlet.doGet(AjaxServlet.java:47)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:693)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
> at
> org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:652)
> at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1320)
> at org.apache.activemq.web.SessionFilter.doFilter(SessionFilter.java:45)
> at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291)
> at
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:443)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
> at
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:532)
> at
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1044)
> at
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:372)
> at
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:189)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:978)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
> at
> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)
> at
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:532)
> at
> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
> at org.eclipse.jetty.server.Server.handle(Server.java:367)
> at
> org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:486)
> at
> org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:926)
> at
> org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:988)
> at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:640)
> at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
> at
> org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
> at
> org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:628)
> at
> org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
> at java.lang.Thread.run(Thread.java:724)
> {code}
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