[AMQ-5442] NullPointerException in SimpleDiscoveryEvent on Shutdown

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.10.0
• Fix Version/s: 5.11.0
• Component/s: Broker
• Assignee: Timothy A. Bish
• Reporter: John Arnesen
• Created: 17/Nov/14 18:41
• Updated: 25/Nov/14 20:30
• Resolved: 25/Nov/14 20:30

Description

If startup of a broker fails when using SimpleDiscoveryAgent, then you will encounter a NullPointerException on shutdown because the TaskRunnerFactory instance is created during startup and there is no check to ensure it was created before attempting the shutdown:

org.apache.activemq.network.DiscoveryNetworkConnector Could not stop service: DiscoveryNetworkConnector:NC:BrokerService[...]. Reason: java.lang.NullPointerException
at org.apache.activemq.transport.discovery.simple.SimpleDiscoveryAgent.stop(SimpleDiscoveryAgent.java:96)