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From "James Strachan" <james.strac...@gmail.com>
Subject Re: Broker used up the memory
Date Wed, 27 Sep 2006 10:59:11 GMT
A consumer will use a readonable amount of RAM due to the prefetch bufffer...

http://incubator.apache.org/activemq/what-is-the-prefetch-limit-for.html

if you are worried about RAM usage for a consumer, set the prefetch to 1

On 9/27/06, HU <gong_pu@hotmail.com> wrote:
>
>
> OK, I will let it run to dead.
>
> It has already run about 7Hours and send 7300 messages between Sender and
> consumer.
> Now, It is still running..
> The used heap by Consumer is up to 2.5M by GC.
>
>
> James.Strachan wrote:
> >
> > How long do you run your system for? Try send about 10,000 messages
> > through the system, then monitor the memory and see if there's a leak.
> >
> > On 9/27/06, HU <gong_pu@hotmail.com> wrote:
> >>
> >> Hi, James.
> >>
> >> Thanks, I have had the broker run with Mysql DB.
> >>
> >> Then I run the broker and a sender on a PC and run a consumer on another
> >> PC,
> >> Send a message to a queue by the sender thread and receve the messsage by
> >> the consumer thread then reply a message to sender thread by the
> >> consumer,
> >> repeat the actions.
> >> I found the heap was used creep up and did not found the used memory be
> >> released by the consumer thread. I used GC to get tracing for the test.
> >> Following are the codes of my test, could you please help me to fix the
> >> issue.
> >>
> >> public class Newconsumer extends Thread{
> >>     private Session         session;
> >>     private Connection      connection;
> >>     private MessageConsumer consumer;
> >>     private Destination     destinetionQueue;
> >>     public Newconsumer(Connection con) {
> >>         this.connection = con;
> >>         try {
> >>             session = this.connection.createSession(true,
> >> Session.AUTO_ACKNOWLEDGE);
> >>             destinetionQueue = session.createQueue("RequestQueue");
> >>             consumer = session.createConsumer(destinetionQueue);
> >>         } catch (JMSException e) { }
> >>     }
> >>
> >>     public void close() {
> >>         try {
> >>                 if( consumer != null ) consumer.close();
> >>             if (session != null) session.close();
> >>         } catch (JMSException e) {  e.printStackTrace(); }
> >>     }
> >>
> >>     public void run() {
> >>         while(true){
> >>             try {
> >>                 Message msg = consumer.receive(10000);
> >>                 if ( msg == null ) continue;
> >>                 Destination destResp = ((MapMessage) msg).getJMSReplyTo()
> >> ;
> >>                 String sCorrelationID = ((MapMessage)
> >> msg).getJMSCorrelationID();
> >>                 String sAnkenID = ((MapMessage) msg).getString("ID");
> >>                 Session sessSend = this.connection.createSession( false,
> >> Session.AUTO_ACKNOWLEDGE);
> >>                 MapMessage msgTime = sessSend.createMapMessage();
> >>                 msgTime.setJMSCorrelationID( sCorrelationID);
> >>                 msgTime.setString( "ID",sAnkenID);
> >>                 msgTime.setLong("TIMEOUT",35000 );
> >>                 MessageProducer producer =
> >> sessSend.createProducer(destResp);
> >>                 producer.send(msgTime);
> >>                 MapMessage msgRes = session.createMapMessage();
> >>                 msgRes.setJMSCorrelationID( sCorrelationID);
> >>                 msgRes.setString( "ID",sAnkenID);
> >>                 msgRes.setString( "RESULT","SUCCESS");
> >>                 producer.send(msgRes);
> >>                 this.session.commit();
> >>                 producer.close();
> >>                 producer=null;
> >>                 sessSend.close();
> >>                 sessSend=null;
> >>
> >>             } catch (JMSException e) { e.printStackTrace(); }
> >>             break;
> >>         }
> >>         this.close();
> >>     }
> >> }
> >>
> >> public class ConsumerController {
> >>         public static Newconsumer consumer;
> >>
> >>     public static void main(String[] args) throws NamingException {
> >>         ActiveMQConnectionFactory factory;
> >>         Connection                connAnken;
> >>         factory = new ActiveMQConnectionFactory("tcp://localhost:61616");
> >>         try {
> >>             connAnken = factory.createQueueConnection();
> >>             connAnken.start();
> >>             consumer = new Newconsumer(connAnken);
> >>                 consumer.start() ;
> >>             try {
> >>                      while(true) {
> >>                          consumer.join();
> >>                          consumer =null;
> >>                          consumer = new Newconsumer(connAnken);
> >>                          consumer.start();
> >>                      }
> >>             } catch (Throwable e) {
> >>                 e.printStackTrace();
> >>             } finally{
> >>                 connAnken.close() ;
> >>                 connAnken=null;
> >>             }
> >>         } catch (Throwable e) { e.printStackTrace(); }
> >>     }
> >> }
> >>
> >>
> >> activemq.xml
> >> ------------------------------------------------------------------------------------------
> >> <!-- START SNIPPET: example -->
> >> <beans xmlns="http://activemq.org/config/1.0">
> >>   <bean
> >> class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"/>
> >>   <broker useJmx="true">
> >>     <destinationPolicy>
> >>       <policyMap><policyEntries>
> >>           <policyEntry topic="FOO.>">
> >>             <dispatchPolicy>
> >>               <strictOrderDispatchPolicy />
> >>             </dispatchPolicy>
> >>             <subscriptionRecoveryPolicy>
> >>               <lastImageSubscriptionRecoveryPolicy />
> >>             </subscriptionRecoveryPolicy>
> >>           </policyEntry>
> >>       </policyEntries></policyMap>
> >>     </destinationPolicy>
> >>     <persistenceAdapter>
> >>       <journaledJDBC journalLogFiles="5"
> >> dataDirectory="../activemq-data-0926" dataSource="#mysql-ds"/>
> >>     </persistenceAdapter>
> >>     <transportConnectors>
> >>        <transportConnector name="default" uri="tcp://localhost:61616"
> >> discoveryUri="multicast://default"/>
> >>        <transportConnector name="stomp"   uri="stomp://localhost:61613"/>
> >>     </transportConnectors>
> >>     <networkConnectors>
> >>       <networkConnector name="default" uri="multicast://default"/>
> >>     </networkConnectors>
> >>   </broker>
> >>   <bean id="mysql-ds" class="org.apache.commons.dbcp.BasicDataSource"
> >> destroy-method="close">
> >>     <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
> >>     <property name="url"
> >> value="jdbc:mysql://localhost/activemq?relaxAutoCommit=true"/>
> >>     <property name="username" value="activemq"/>
> >>     <property name="password" value="activemq"/>
> >>     <property name="poolPreparedStatements" value="true"/>
> >>   </bean>
> >>
> >> </beans>
> >> <!-- END SNIPPET: example -->
> >>
> >> eclipse.ini
> >> ------------------------------------------------------------------------------------------
> >> -vmargs
> >> -Xms128M
> >> -Xmx512M
> >> -XX:PermSize=64M
> >> -XX:MaxPermSize=128M
> >>
> >> Thanks,
> >> Hu
> >> --
> >> View this message in context:
> >> http://www.nabble.com/Broker-used-up-the-memory-tf2316972.html#a6523894
> >> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
> >>
> >>
> >
> >
> > --
> >
> > James
> > -------
> > http://radio.weblogs.com/0112098/
> >
> >
>
> --
> View this message in context: http://www.nabble.com/Broker-used-up-the-memory-tf2316972.html#a6524501
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>
>


-- 

James
-------
http://radio.weblogs.com/0112098/

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