[AMQ-3369] occasionally NPE in ActiveMQTextMessage.getSize()

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Cannot Reproduce
• Affects Version/s: 5.4.1
• Component/s: Broker

Environment

JDK 1.6 (64-bit), Windows Server 2008 x64

• Assignee: Unassigned
• Reporter: Ivan Pechorin
• Created: 16/Jun/11 14:50
• Updated: 22/Aug/11 13:18
• Resolved: 19/Jul/11 20:56

Description

Sometime we get NullPointerException when sending a text message. We use method send(destination, message) of interface javax.jms.MessageProducer.

java.lang.NullPointerException
at org.apache.activemq.command.ActiveMQTextMessage.getSize(ActiveMQTextMessage.java:148)
at org.apache.activemq.ActiveMQSession.send(ActiveMQSession.java:1753)
at org.apache.activemq.ActiveMQMessageProducer.send(ActiveMQMessageProducer.java:231)
at org.apache.activemq.ActiveMQMessageProducerSupport.send(ActiveMQMessageProducerSupport.java:300)

Caller code is:

try {
final TextMessage message = session.createTextMessage(msg);
message.setJMSType(type);
message.setJMSReplyTo(destination);
message.setJMSCorrelationID(jmsMessageId);
producer.send(destination, message);
} catch (JMSException ex) {
...
}

I.e. we don't reuse or store the message being sent.

We are also 100% sure that both session and its producer are used only from one thread at any point of time (we have custom session pool).

Broker URI is vm://jboss-activemq-broker?jms.copyMessageOnSend=false&jms.objectMessageSerializationDefered=true&jms.useAsyncSend=true

The NPE occurs occasionally, we were not able to reproduce it deterministically so far.

Any suggestions on how to investigate this?