[AMQ6, purge, NullPointerException] invoking purge intermittently throws a NullPointerException

Solution Verified - Updated -

Issue

  • calling the JMX purge() operation on a queue intermittently (but very rarely) throws the following NullPointerException

java.lang.NullPointerException at org.apache.activemq.broker.region.Queue.doPageIn(Queue.java:1894) at org.apache.activemq.broker.region.Queue.purge(Queue.java:1246) at org.apache.activemq.broker.jmx.QueueView.purge(QueueView.java:62) 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 sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71) at sun.reflect.GeneratedMethodAccessor24.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275) at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:112) at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:46) at com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:237) at com.sun.jmx.mbeanserver.PerInterface.invoke(PerInterface.java:138) at com.sun.jmx.mbeanserver.MBeanSupport.invoke(MBeanSupport.java:252) at javax.management.StandardMBean.invoke(StandardMBean.java:405) at org.apache.activemq.broker.jmx.AnnotatedMBean.invoke(AnnotatedMBean.java:238) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) at org.jolokia.handler.ExecHandler.doHandleRequest(ExecHandler.java:98) at org.jolokia.handler.ExecHandler.doHandleRequest(ExecHandler.java:40) at org.jolokia.handler.JsonRequestHandler.handleRequest(JsonRequestHandler.java:89) at org.jolokia.backend.MBeanServerExecutorLocal.handleRequest(MBeanServerExecutorLocal.java:109) at org.jolokia.backend.MBeanServerHandler.dispatchRequest(MBeanServerHandler.java:161) at org.jolokia.backend.LocalRequestDispatcher.dispatchRequest(LocalRequestDispatcher.java:99) at org.jolokia.backend.BackendManager.callRequestDispatcher(BackendManager.java:413) at org.jolokia.backend.BackendManager.handleRequest(BackendManager.java:158) at org.jolokia.http.HttpRequestHandler.executeRequest(HttpRequestHandler.java:197) at org.jolokia.http.HttpRequestHandler.handlePostRequest(HttpRequestHandler.java:137) at org.jolokia.jvmagent.handler.JolokiaHttpHandler.executePostRequest(JolokiaHttpHandler.java:279) at org.jolokia.jvmagent.handler.JolokiaHttpHandler.doHandle(JolokiaHttpHandler.java:233) at org.jolokia.jvmagent.handler.JolokiaHttpHandler.handle(JolokiaHttpHandler.java:178) at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:79) at sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:72) at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:82) at sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:675) at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:79) at sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:645) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)

Environment

  • Red Hat AMQ 6.3

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