Failing to close a connection leaves consumers behind that prevent new
consumers receiving messages
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Key: AMQ-1850
URL: https://issues.apache.org/activemq/browse/AMQ-1850
Project: ActiveMQ
Issue Type: Bug
Components: Broker
Affects Versions: 5.1.0, 5.0.0, 4.1.2, 4.1.1, 4.1.0
Reporter: Denis Abramov
Priority: Blocker
I have been having this problem throughout all of the ActiveMQ versions
(starting from 4.1.0-incubator). Just got used to killing off the dead clients
throught jconsole every morning. Would be nice to have this fixed... Glad
someone put a test case for it [thanks Ossory]
Hi,
I have an issue where a JMS client attempts to receive messages from a queue.
The client fails due to a JVM crash and the JMS connection is not closed. This
leaves a consumer behind (that I can see in the ActiveMQ admin console). If I
restart the JMS client it fails to receive all of the new messages that sent to
the queue in question.
Using JMX to stop the open connections or closing ActiveMQ allows the client to
work again.
Is there a timeout value that you can apply to connections to avoid having to
do this?
Any help would be appreciated.
I've created an artificial test case based on the behaviour I have seen in
ActiveMQ 5.1 on Windows XP.
The method jmsTest2 deliberately fails to close the connection.
static final String PROVIDER_URL = "tcp://localhost:61616";
static final String QUEUE = "queueA";
static void jmsTest() throws JMSException, NamingException {
Properties props = new Properties();
props.setProperty(Context.INITIAL_CONTEXT_FACTORY,
"org.apache.activemq.jndi.ActiveMQInitialContextFactory");
props.setProperty(Context.PROVIDER_URL, PROVIDER_URL);
InitialContext ctx = new InitialContext(props);
QueueConnectionFactory cf =
(QueueConnectionFactory)ctx.lookup("ConnectionFactory");
QueueConnection conn = cf.createQueueConnection();
conn.start(); //this is required if you want to receive messages using
this connection
QueueSession sess = conn.createQueueSession(false,
Session.AUTO_ACKNOWLEDGE);
Queue qa = sess.createQueue(QUEUE);
QueueSender sender = sess.createSender(qa);
for(int i = 0; i < 10; i++) {
Message msg = sess.createTextMessage("test");
sender.send(msg);
}
sender.close();
sess.close();
conn.close();
}
static void jmsTest2() throws JMSException, NamingException {
Properties props = new Properties();
props.setProperty(Context.INITIAL_CONTEXT_FACTORY,
"org.apache.activemq.jndi.ActiveMQInitialContextFactory");
props.setProperty(Context.PROVIDER_URL, PROVIDER_URL);
InitialContext ctx = new InitialContext(props);
QueueConnectionFactory cf =
(QueueConnectionFactory)ctx.lookup("ConnectionFactory");
QueueConnection conn = cf.createQueueConnection();
conn.start(); //this is required if you want to receive messages using
this connection
QueueSession sess = conn.createQueueSession(false,
Session.AUTO_ACKNOWLEDGE);
Queue qa = sess.createQueue(QUEUE);
QueueReceiver qr = sess.createReceiver(qa);
for(int i = 0; i < 10; i++) {
Message msgin = qr.receive(5000);
System.out.println("msgin" + i + " = " + msgin);
}
//qr.close();
//sess.close();
//conn.stop();
//conn.close();
}
public static void main(String[] args)
{
jmsTest();
jmsTest2();
jmsTest();
jmsTest2();
}
The first call to jmsTest2 prints 10 messages but the second call fails to read
any messages. The JVM will not stop after the main method completes because
some ActiveMQ threads remain open.
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