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From "ying (JIRA)" <j...@apache.org>
Subject [jira] Updated: (AMQ-2135) network of brokers distributes messages to brokers with 0 consumers with dynamicOnly=true set
Date Fri, 05 Feb 2010 20:41:32 GMT

     [ https://issues.apache.org/activemq/browse/AMQ-2135?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

ying updated AMQ-2135:
----------------------

    Attachment: AMQ-2135-022010.patch
                AMQ2135Test.java

hi, the old AMQ-2135-UnitTest.patch has a Thread.sleep(1000) so after the producer produce,
wait for 1s, then it starts to check how many messages are consumed and apparently when the
message number increases, it needs to give more time for the consumer to consume the messages.

I made a patch on today's trunk r906983

Attached are the AMQ2135Test.java which demonstrate the problem with the trunk code. You will
see the test will never quit because it will never consume all the messages produced.
and apply AMQ-2135-022010.patch it will fix the issue. 

> network of brokers distributes messages to brokers with 0 consumers with dynamicOnly=true
set
> ---------------------------------------------------------------------------------------------
>
>                 Key: AMQ-2135
>                 URL: https://issues.apache.org/activemq/browse/AMQ-2135
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.2.0
>         Environment: linux (centos 4.6) using ActiveMQ 5.2.0 binary distribution
>            Reporter: Don Hoffman
>         Attachments: AMQ-2135-022010.patch, AMQ-2135-Patch-03182009.patch, AMQ-2135-UnitTest.patch,
AMQ2135Test.java, testamq1.log, testamq2.log, testamq3.log
>
>
> using only the example code, the 5.2.0 release can be made to distribute messages to
brokers with no consumers, which remain at those brokers and are never consumed, unless a
consumer later connects specifically to those brokers.
> this bug is not reproducible in 5.1.0.
> to reproduce:
> run 3 brokers.  connect a consumer to brokers 1 and 2.  connect a producer to broker
1.  not all messages produced will be received by the 2 consumers.  note that the specific
brokers connected to matters for the 3-broker case.  for example, on my machine, if the producer
connects to broker 2 instead of broker 1, all messages are received.  you may need to try
various combinations of consumer/producer connections to reproduce the problem, but this specific
setup breaks reliably for me.
> this problem becomes more pronounced and easier to reproduce as the number of brokers
increases.
> specific configuration used to reproduce:
> 3 broker config xml files:
> testamq1.xml
> <beans
>   xmlns="http://www.springframework.org/schema/beans"
>   xmlns:amq="http://activemq.apache.org/schema/core"
>   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
>   http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd
>   http://activemq.apache.org/camel/schema/spring http://activemq.apache.org/camel/schema/spring/camel-spring.xsd">
>   <broker brokerName="b1" xmlns="http://activemq.apache.org/schema/core" useJmx="false"
advisorySupport="true">
>     <persistenceAdapter>
>       <amqPersistenceAdapter directory="activemq-data1" maxFileLength="32mb"/>
>     </persistenceAdapter>
>     <transportConnectors>
>       <transportConnector uri="tcp://localhost:61616"/>
>     </transportConnectors>
>     <networkConnectors>
>       <networkConnector uri="static://(tcp://localhost:61617,tcp://localhost:61618)"
dynamicOnly="true" networkTTL="5"/>
>     </networkConnectors>
>   </broker>
> </beans>
> testamq2.xml
> <beans
>   xmlns="http://www.springframework.org/schema/beans"
>   xmlns:amq="http://activemq.apache.org/schema/core"
>   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
>   http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd
>   http://activemq.apache.org/camel/schema/spring http://activemq.apache.org/camel/schema/spring/camel-spring.xsd">
>   <broker brokerName="b2" xmlns="http://activemq.apache.org/schema/core" useJmx="false"
advisorySupport="true">
>     <persistenceAdapter>
>       <amqPersistenceAdapter directory="activemq-data2" maxFileLength="32mb"/>
>     </persistenceAdapter>
>     <transportConnectors>
>       <transportConnector uri="tcp://localhost:61617"/>
>     </transportConnectors>
>     <networkConnectors>
>       <networkConnector uri="static://(tcp://localhost:61616,tcp://localhost:61618)"
dynamicOnly="true" networkTTL="5"/>
>     </networkConnectors>
>   </broker>
> </beans>
> testamq3.xml
> <beans
>   xmlns="http://www.springframework.org/schema/beans"
>   xmlns:amq="http://activemq.apache.org/schema/core"
>   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
>   http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd
>   http://activemq.apache.org/camel/schema/spring http://activemq.apache.org/camel/schema/spring/camel-spring.xsd">
>   <broker brokerName="b3" xmlns="http://activemq.apache.org/schema/core" useJmx="false"
advisorySupport="true">
>     <persistenceAdapter>
>       <amqPersistenceAdapter directory="activemq-data3" maxFileLength="32mb"/>
>     </persistenceAdapter>
>     <transportConnectors>
>       <transportConnector uri="tcp://localhost:61618"/>
>     </transportConnectors>
>     <networkConnectors>
>       <networkConnector uri="static://(tcp://localhost:61616,tcp://localhost:61617)"
dynamicOnly="true" networkTTL="5"/>
>     </networkConnectors>
>   </broker>
> </beans>
> run 3 brokers:
> bin/activemq xbean:testamq1.xml
> bin/activemq xbean:testamq2.xml
> bin/activemq xbean:testamq3.xml
> run 2 consumers (from examples directory):
> ant consumer -Durl="failover:(tcp://localhost:61616)" -Dsubject="test.queue" -Dmax=100
-DsleepTime=3
> ant consumer -Durl="failover:(tcp://localhost:61617)" -Dsubject="test.queue" -Dmax=100
-DsleepTime=3
> run 1 producer (from examples directory) with 10 messages:
> ant producer -Durl="failover:(tcp://localhost:61616)" -Dsubject="test.queue" -Dmax=10
> consumers will not receive all messages.

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