[AMQ-2872] Contention between concurrent connection start and new session creation - start can find partially created session

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.4.0
• Fix Version/s: 5.4.1
• Component/s: JMS client
• Assignee: Gary Tully
• Reporter: Gary Tully
• Created: 19/Aug/10 09:17
• Updated: 19/Aug/10 10:10
• Resolved: 19/Aug/10 10:10

Description

Exception in thread "Thread-20" java.lang.NullPointerException
	at org.apache.activemq.ActiveMQSession.start(ActiveMQSession.java:1637)
	at org.apache.activemq.ActiveMQConnection.start(ActiveMQConnection.java:508)
	at org.springframework.jms.connection.SingleConnectionFactory$SharedConnectionInvocationHandler.invoke(SingleConnectionFactory.java:514)
	at $Proxy5.start(Unknown Source)
	at org.springframework.jms.core.JmsTemplate.execute(JmsTemplate.java:464)
	at org.springframework.jms.core.JmsTemplate.receiveSelected(JmsTemplate.java:708)
	at org.springframework.jms.core.JmsTemplate.receive(JmsTemplate.java:686)
	at com.iona.cpi.failure.http.HttpLoadTest$Receiver.run(HttpLoadTest.java:90)
	at java.lang.Thread.run(Thread.java:613)

Issue is async connection start and session creation. The partially created session is added to the connection too soon.