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From "Gary Tully (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (AMQ-2283) New Multicast discovery agent thread is created for each message
Date Wed, 08 Jul 2009 13:02:07 GMT

     [ https://issues.apache.org/activemq/browse/AMQ-2283?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gary Tully resolved AMQ-2283.
-----------------------------

       Resolution: Fixed
    Fix Version/s: 5.3.0

fixed in r792127

> New Multicast discovery agent thread is created for each message
> ----------------------------------------------------------------
>
>                 Key: AMQ-2283
>                 URL: https://issues.apache.org/activemq/browse/AMQ-2283
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.2.0
>         Environment: Linux, jdk6u13, jdk6u14
>            Reporter: Eric Bouer
>            Assignee: Gary Tully
>             Fix For: 5.3.0
>
>
> I found out that a new thread is started for each message I send, but that thread is
staying alive for the whole program lifetime.
> The number of live "multicast discovery agent notifier" threads scales up linearly.
> Eventually I ended up with 10000 threads of the above type running
> It doesn't seems to be a camel issue since when I try with tcp://localhost:61616 everything
works fine.
> I'm suspecting a bug. and I wanted to share it with you before I open a ticket.
> Eric
> =============
> package com.mycompany.CamelExample;
> import javax.jms.ConnectionFactory;
> import org.apache.activemq.ActiveMQConnectionFactory;
> import org.apache.camel.CamelContext;
> import org.apache.camel.ProducerTemplate;
> import org.apache.camel.builder.RouteBuilder;
> import org.apache.camel.component.jms.JmsComponent;
> import org.apache.camel.impl.DefaultCamelContext;
> import org.apache.log4j.Logger;
> public final class App {
>    private static Logger log = Logger.getLogger("CamelTestApp");
>    public static void main(String args[]) throws Exception {
>         CamelContext context = new DefaultCamelContext();
>         ConnectionFactory connectionFactory =
>                     new ActiveMQConnectionFactory("failover:(discovery:(multicast://224.1.2.3:6255?group=default),tcp://localhost:61616)");
>         final String JMSTOPID = "test-jms";
>         final String DEST_TOPIC = "test-jms:topic:TCommandRequest";
>         final String SRC_TOPIC = "test-jms:topic:TCommandRequest";
>         context.addComponent("test-jms", JmsComponent.jmsComponentAutoAcknowledge(connectionFactory));
>         context.addRoutes(new RouteBuilder() {
>             public void configure() {from(SRC_TOPIC).to("mock:test");}});
>         ProducerTemplate template = context.createProducerTemplate();
>         context.start();
>            while (true) {
>                 template.sendBody(DEST_TOPIC, "TEST_TEXT");
>                Thread.sleep(5000);
>             }
>     }
> }
> ======================
> My log shows:
> 12:02:06,212  INFO DefaultCamelContext:729 - Apache Camel 2.0-M1 (CamelContext:camel-1)
is starting
> 12:02:06,582  WARN ObjectHelper:523 - Cannot find class: org.apache.xalan.xsltc.trax.DOM2SAX
> 12:02:07,137  INFO DiscoveryTransport:73 - Adding new broker connection URL: tcp://192.168.0.1:61616
> 12:02:07,220  INFO FailoverTransport:714 - Successfully connected to tcp://192.168.0.1:61616
> 12:02:07,222  INFO FailoverTransport:714 - Successfully connected to discovery:(multicast://224.1.2.3:6255?group=default)
> 12:02:07,247  INFO DefaultCamelContext:771 - Apache Camel 2.0-M1 (CamelContext:camel-1)
started
> 12:02:07,640  INFO DiscoveryTransport:73 - Adding new broker connection URL: tcp://192.168.0.1:61616
> 12:02:07,715  INFO FailoverTransport:714 - Successfully connected to tcp://192.168.0.1:61616
> 12:02:07,716  INFO FailoverTransport:714 - Successfully connected to discovery:(multicast://224.1.2.3:6255?group=default)
> 12:02:13,181  INFO DiscoveryTransport:73 - Adding new broker connection URL: tcp://192.168.64.1:61616
> 12:02:13,220  INFO FailoverTransport:714 - Successfully connected to tcp://192.168.0.1:61616
> 12:02:13,222  INFO FailoverTransport:714 - Successfully connected to discovery:(multicast://224.1.2.3:6255?group=default)
> 12:02:18,731  INFO DiscoveryTransport:73 - Adding new broker connection URL: tcp://192.168.0.1:61616
> 12:02:18,961  INFO FailoverTransport:714 - Successfully connected to tcp://192.168.0.1:61616
> 12:02:18,963  INFO FailoverTransport:714 - Successfully connected to discovery:(multicast://224.1.2.3:6255?group=default)
> .
> .
> . 

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