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https://issues.apache.org/activemq/browse/AMQ-1600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=44129#action_44129
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Denis Abramov commented on AMQ-1600:
------------------------------------
Not really doing anything fancy to have this issue happen... just calling send
many times: persistent = false and looking at JConsole...
/*********************************************************************
* Create a connection to the messaging system
*
* @param jms_url
* @param intf
* @param is_durable_subscriber
* @throws Exception
*********************************************************************/
public void createConnection(String jms_url, MessageManagerIntf intf,
boolean is_durable_subscriber) throws Exception {
_jms_url = jms_url;
_is_durable_subscriber = is_durable_subscriber;
_msg_wrapper_intf = intf;
log.info("");
log.info("");
log.info("Creating Connection to: " + jms_url);
log.info("");
String user = ActiveMQConnection.DEFAULT_USER;
String password = ActiveMQConnection.DEFAULT_PASSWORD;
//jms_url = addJMSOptions(jms_url);
ActiveMQConnectionFactory connectionFactory = new
ActiveMQConnectionFactory(user, password, jms_url);
connectionFactory.setDispatchAsync(true);
connectionFactory.setUseAsyncSend(true);
_connection = connectionFactory.createConnection();
_connection.setExceptionListener(this);
if (is_durable_subscriber)
_connection.setClientID(_msg_wrapper_intf.getClass().getSimpleName());
else {
SimpleDateFormat f = new SimpleDateFormat("M/d/yyyy
h_mm_ss a");
Calendar cal = Calendar.getInstance();
_connection.setClientID(_msg_wrapper_intf.getClass().getSimpleName().toLowerCase()
+ "@" + InetAddress.getLocalHost().getHostName().toUpperCase() + "-" +
f.format(cal.getTime()) + "--" + cal.getTimeInMillis());
}
log.info("JMS VERSION: " +
_connection.getMetaData().getJMSVersion());
log.info("JMS PROVIDER: " +
_connection.getMetaData().getJMSProviderName());
log.info("JMS PROVIDER VERSION: " +
_connection.getMetaData().getProviderVersion());
log.info("CLIENT ID: " + _connection.getClientID());
_connection.start();
_session = _connection.createSession(false,
Session.AUTO_ACKNOWLEDGE);
}
public void send(String name, DESTINATION_TYPE destination_type, Destination
reply_to, MessageIntf wrapper, boolean persistent) throws Exception {
Destination dest = createDestination(name, destination_type);
MessageProducer publisher = getProducer(dest, persistent);
//wrapper.generateXMLMessage() just generates some
XML message.
TextMessage msg =
_session.createTextMessage(wrapper.generateXMLMessage());
msg.setJMSReplyTo(reply_to);
log.debug(this.getClass().getName() + ">>>>>> SENDING MESSAGE
TO '" + dest + "': " + wrapper.generateXMLMessage());
publisher.send(msg);
}
public MessageProducer getProducer(Destination dest, boolean
persistent) throws Exception {
//just a little optimization so I don't have too many producing
running amock. Have 1 producer per destination
if (_producer_cache.containsKey(dest.toString()))
return _producer_cache.get(dest.toString());
MessageProducer publisher = _session.createProducer(dest);
if(persistent)
publisher.setDeliveryMode(DeliveryMode.PERSISTENT);
else
publisher.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
_producer_cache.put(dest.toString(), publisher);
return publisher;
}
/********************************************************************
* Create a topic
* @param name
* @return
* @throws JMSException
*
*******************************************************************/
public Destination createDestination(String name, DESTINATION_TYPE
destination) throws JMSException {
switch (destination) {
case TOPIC:
return _session.createTopic(name);
case QUEUE:
return _session.createQueue(name);
default:
return null;
}
}
> Number of items in Topic queue never empties out (Queue Size in JMX for every
> topic seems to be > 0 all the time)
> -----------------------------------------------------------------------------------------------------------------
>
> Key: AMQ-1600
> URL: https://issues.apache.org/activemq/browse/AMQ-1600
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker
> Affects Versions: 5.1.0
> Environment: Linux
> Reporter: Denis Abramov
> Assignee: Rob Davies
> Priority: Critical
> Attachments: untitled.JPG
>
>
> If I create a topic and then have a producer write to the topic
> (non-persistent message) the items in the queueSize in JMX appears to be the
> total messages that I sent. Even if I start the consumer the number of items
> on the queue never goes down. If I run the same code in 4.1.0 the queue size
> is always 0 which is the expected behavior -- something changed in 5.1...
> Will try on 5.0 in a few minutes.
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