[QPID-7836] NPE logged at WARN during management view of messages whilst consumer active

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: qpid-java-6.0, qpid-java-6.1, qpid-java-6.1.3
• Fix Version/s: qpid-java-broker-7.0.0, qpid-java-6.1.5
• Component/s: Broker-J
• Assignee: Keith Wall
• Reporter: Keith Wall
• Created: 26/Jun/17 16:48
• Updated: 13/Mar/20 19:02
• Resolved: 27/Jun/17 12:12

Description

I encountered the following exception (WARN reported to logs) whilst testing the 6.1.3RC. The Broker survived and its operation was otherwise unaffected, As a user of the Web Management Console, I saw briefly a ? appear where the contents of the queue would normally appear, but this disappeared on refreshing the table.

The issue is not related to changes made in 6.1.3.

2017-06-26 17:38:58,471 ERROR [HttpManagement-HTTP-124] (o.a.q.s.m.p.f.ExceptionHandlingFilter) - Unexpected exception in servlet '/api/latest/queue/default/default/queue/getMessageInfo':
java.lang.NullPointerException: null
	at org.apache.qpid.server.message.MessageInfoImpl.<init>(MessageInfoImpl.java:58)
	at org.apache.qpid.server.queue.AbstractQueue$MessageCollector.visit(AbstractQueue.java:3885)
	at org.apache.qpid.server.queue.AbstractQueue.visit(AbstractQueue.java:1886)
	at org.apache.qpid.server.queue.AbstractQueue.getMessageInfo(AbstractQueue.java:3757)
	at org.apache.qpid.server.queue.StandardQueueImplWithAccessChecking.getMessageInfo(StandardQueueImplWithAccessChecking.java:89)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.qpid.server.model.ConfiguredObjectMethodOperation.perform(ConfiguredObjectMethodOperation.java:128)
	at org.apache.qpid.server.management.plugin.servlet.rest.RestServlet.doOperation(RestServlet.java:788)
	at org.apache.qpid.server.management.plugin.servlet.rest.RestServlet.doGetWithSubjectAndActor(RestServlet.java:376)
	at org.apache.qpid.server.management.plugin.servlet.rest.AbstractServlet$1.run(AbstractServlet.java:93)
	at org.apache.qpid.server.management.plugin.servlet.rest.AbstractServlet$1.run(AbstractServlet.java:89)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:422)
	at org.apache.qpid.server.management.plugin.servlet.rest.AbstractServlet.doWithSubjectAndActor(AbstractServlet.java:218)
	at org.apache.qpid.server.management.plugin.servlet.rest.AbstractServlet.doGet(AbstractServlet.java:87)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:575)
	at org.apache.qpid.server.management.plugin.servlet.rest.RestServlet.service(RestServlet.java:553)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1496)
	at org.apache.qpid.server.management.plugin.filter.ForbiddingAuthorisationFilter.doFilter(ForbiddingAuthorisationFilter.java:94)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1467)
	at org.apache.qpid.server.management.plugin.filter.ForbiddingTraceFilter.doFilter(ForbiddingTraceFilter.java:65)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1467)
	at org.apache.qpid.server.management.plugin.filter.LoggingFilter.doFilter(LoggingFilter.java:65)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1467)
	at org.apache.qpid.server.management.plugin.filter.PreemptiveSessionInvalidationFilter.doFilter(PreemptiveSessionInvalidationFilter.java:53)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1467)
	at org.eclipse.jetty.servlets.CrossOriginFilter.handle(CrossOriginFilter.java:247)
	at org.eclipse.jetty.servlets.CrossOriginFilter.doFilter(CrossOriginFilter.java:210)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1467)
	at org.apache.qpid.server.management.plugin.filter.ExceptionHandlingFilter.doFilter(ExceptionHandlingFilter.java:59)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1467)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:501)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:229)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:429)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
	at org.eclipse.jetty.server.Server.handle(Server.java:370)
	at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)
	at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:971)
	at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1033)
	at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:644)
	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.SslConnection.handle(SslConnection.java:196)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:696)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:53)
	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:748)