[jira] [Created] (ARTEMIS-1524) ActiveMQServerControl.listAddresses() can fail with NullPointerException

["Pat Fox (JIRA)" <ji...@apache.org>]

Pat Fox created ARTEMIS-1524:
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             Summary: ActiveMQServerControl.listAddresses() can fail with NullPointerException
                 Key: ARTEMIS-1524
                 URL: https://issues.apache.org/jira/browse/ARTEMIS-1524
             Project: ActiveMQ Artemis
          Issue Type: Bug
          Components: Broker
    Affects Versions: 2.4.0
            Reporter: Pat Fox
            Priority: Minor


race condition between ActiveMQServerControl.listAddresses() and ActiveMQServerControl.deleteAddress() that can result in the following NullPointerException

{code}
java.lang.NullPointerException: null
	at org.apache.activemq.artemis.core.management.impl.view.AddressView.toJson(Unknown Source)
	at org.apache.activemq.artemis.core.management.impl.view.AddressView.toJson(Unknown Source)
	at org.apache.activemq.artemis.core.management.impl.view.ActiveMQAbstractView.getResultsAsJson(ActiveMQAbstractView.java:68)
	at org.apache.activemq.artemis.core.management.impl.ActiveMQServerControlImpl.listAddresses(ActiveMQServerControlImpl.java:1743)
	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:483)
{code}

The listAddresses() retrieves the list of addresses and then retrieves the detail of each one to build the Json representation. If the deleteAddress() happens between getting the list and retrieving the details - a NullPointerException is thrown. 





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