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From kristoffer <sto...@gmail.com>
Subject Client hangs in MulticastDiscoveryAgent
Date Thu, 19 Oct 2006 08:39:39 GMT

Hi,

incubator-activemq-4.0.2.jar

I have successfully set up static tcp communication between clients and a
broker, Yeah! But when i try to move to multicast in order to discover my
brokers from the clients i get in trouble..

I keep getting warning messages (on broker and client) like:

org.apache.activemq.transport.discovery.multicast.MulticastDiscoveryAgent
start
WARNING: brokerName not set

I read an earlier thread that explained that brokerName should be set like
an valid URI, but that did not work for me. (i know the brokerName is
currently not a valid URI, i took this from the testcases so it should
work?)

Here is my activemq.xml

<beans xmlns="http://activemq.org/config/1.0">
  <broker useJmx="false" brokerName="BrokerA">
  
    <persistenceAdapter>
      <journaledJDBC journalLogFiles="5"
dataDirectory="activemq-broker-data"/>
    </persistenceAdapter>

    <transportConnectors>
       <transportConnector name="default" uri="tcp://localhost:61616"
discoveryUri="multicast://224.1.2.3:6155"/>
    </transportConnectors>
    
    <networkConnectors>
      <networkConnector name="default" uri="multicast://224.1.2.3:6155"/>
    </networkConnectors>
    
  </broker>
</beans>

On the client i create my URI like so: discovery:multicast://224.1.2.3:6155

When i fire up my client i get this 'broker not set' message but then it
just hangs..? Here's a thread dump from that hanging:

Full thread dump Java HotSpot(TM) Client VM (1.5.0_09-b01 mixed mode,
sharing):

"MulticastDiscovery: null" daemon prio=6 tid=0x00acbe78 nid=0x5e0 runnable
[0x02edf000..0x02edfbe8]
        at java.net.PlainDatagramSocketImpl.receive0(Native Method)
        - locked <0x22aea588> (a java.net.PlainDatagramSocketImpl)
        at java.net.PlainDatagramSocketImpl.receive(Unknown Source)
        - locked <0x22aea588> (a java.net.PlainDatagramSocketImpl)
        at java.net.DatagramSocket.receive(Unknown Source)
        - locked <0x22af9c58> (a java.net.DatagramPacket)
        - locked <0x22aea138> (a java.net.MulticastSocket)
        at
org.apache.activemq.transport.discovery.multicast.MulticastDiscoveryAgent.run(MulticastDiscoveryAgent.java:255)
        at java.lang.Thread.run(Unknown Source)

"Low Memory Detector" daemon prio=6 tid=0x00a72030 nid=0x708 runnable
[0x00000000..0x00000000]

"CompilerThread0" daemon prio=10 tid=0x00a70ad0 nid=0xfc waiting on
condition [0x00000000..0x02c0f748]

"Signal Dispatcher" daemon prio=10 tid=0x00a6fdc0 nid=0x1e0 waiting on
condition [0x00000000..0x00000000]

"Finalizer" daemon prio=8 tid=0x00a42958 nid=0x4fc in Object.wait()
[0x02b8f000..0x02b8f9e8]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x22fc39a8> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(Unknown Source)
        - locked <0x22fc39a8> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(Unknown Source)
        at java.lang.ref.Finalizer$FinalizerThread.run(Unknown Source)

"Reference Handler" daemon prio=10 tid=0x0003fb30 nid=0x700 in Object.wait()
[0x02b4f000..0x02b4fae8]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x22fc3a28> (a java.lang.ref.Reference$Lock)
        at java.lang.Object.wait(Unknown Source)
        at java.lang.ref.Reference$ReferenceHandler.run(Unknown Source)
        - locked <0x22fc3a28> (a java.lang.ref.Reference$Lock)

"main" prio=6 tid=0x00036b88 nid=0xd08 in Object.wait()
[0x0007f000..0x0007fc3c]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x22b557d0> (a java.lang.Object)
        at
org.apache.activemq.transport.failover.FailoverTransport.oneway(FailoverTransport.java:352)
        - locked <0x22b557d0> (a java.lang.Object)
        at
org.apache.activemq.transport.TransportFilter.oneway(TransportFilter.java:82)
        at
org.apache.activemq.transport.MutexTransport.oneway(MutexTransport.java:45)
        - locked <0x22b536d0> (a java.lang.Object)
        at
org.apache.activemq.transport.ResponseCorrelator.asyncRequest(ResponseCorrelator.java:67)
        at
org.apache.activemq.transport.ResponseCorrelator.request(ResponseCorrelator.java:72)
        at
org.apache.activemq.ActiveMQConnection.syncSendPacket(ActiveMQConnection.java:1115)
        at
org.apache.activemq.ActiveMQConnection.ensureConnectionInfoSent(ActiveMQConnection.java:1203)
        - locked <0x22ad11d0> (a org.apache.activemq.ActiveMQConnection)
        at
org.apache.activemq.ActiveMQConnection.start(ActiveMQConnection.java:435)
        at
org.logicblaze.lingo.jms.JmsProducerConfig.createConnection(JmsProducerConfig.java:85)
        at
org.logicblaze.lingo.jms.impl.MultiplexingRequestor.newInstance(MultiplexingRequestor.java:65)
        at
org.logicblaze.lingo.jms.JmsServiceExporterMessageListener.afterPropertiesSet(JmsServiceExporterMessageListener.java:84)
        at
org.logicblaze.lingo.jms.JmsServiceExporter.afterPropertiesSet(JmsServiceExporter.java:47)
        at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1091)
        at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:396)
        at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:233)
        - locked <0x23007b60> (a java.util.HashMap)
        at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:145)
        at
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:283)
        at
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:313)
        at
org.springframework.context.support.FileSystemXmlApplicationContext.<init>(FileSystemXmlApplicationContext.java:89)
        at
org.springframework.context.support.FileSystemXmlApplicationContext.<init>(FileSystemXmlApplicationContext.java:74)
        at
org.springframework.context.support.FileSystemXmlApplicationContext.<init>(FileSystemXmlApplicationContext.java:65)
        at se.ericsson.consumer.test.ConsumerTest.main(ConsumerTest.java:12)

"VM Thread" prio=10 tid=0x00a40ae8 nid=0xe1c runnable

"VM Periodic Task Thread" prio=10 tid=0x00a6f9a8 nid=0xc4c waiting on
condition

I have tried to set the muticast URI to multicast://default as suggested in
many examples but it gives me the same error. Could this have something to
do with my network? I have opened up my firewall and still the same
hanging..
Clients and broker are running on the same localhost...

Any ideas?

Thanks,
-Kristoffer
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