[QPID-3617] AMQQueueMBean.viewMessages: Viewing message without priority set ends with NullPointerException

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.10, 0.12, 0.13
• Fix Version/s: 0.14
• Component/s: Broker-J, Python Client
• Labels: jmx_interface
• Assignee: Robbie Gemmell
• Reporter: Keith Wall
• Created: 15/Nov/11 13:46
• Updated: 29/Jul/13 18:54
• Resolved: 17/Nov/11 18:16

Description

If a user of the JMX Console (or Management Console) tries to view a message without message priority (such as those sent by the Python Client) the user sees a NullPointerException.

The issue is with the defaulting logic in MessageTransferHeader#getPriority().

2011-11-15 12:19:34,154 ERROR [RMI TCP Connection(2)-169.24.25.106] (AMQQueueMBean.java:506) - error
java.lang.NullPointerException
        at org.apache.qpid.server.message.MessageTransferHeader.getPriority(MessageTransferHeader.java:85)
        at org.apache.qpid.server.queue.AMQQueueMBean.getMessageTransferMessageHeaderProps(AMQQueueMBean.java:568)
        at org.apache.qpid.server.queue.AMQQueueMBean.viewMessages(AMQQueueMBean.java:482)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:93)
        at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:27)
        at com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:208)
        at com.sun.jmx.mbeanserver.PerInterface.invoke(PerInterface.java:120)
        at com.sun.jmx.mbeanserver.MBeanSupport.invoke(MBeanSupport.java:262)
        at javax.management.StandardMBean.invoke(StandardMBean.java:391)
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:836)
        at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:761)
        at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1427)
        at javax.management.remote.rmi.RMIConnectionImpl.access$200(RMIConnectionImpl.java:72)
        at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1265)
        at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1360)
        at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:788)
        at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:305)
        at sun.rmi.transport.Transport$1.run(Transport.java:159)