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From "Reynald Borer (JIRA)" <j...@apache.org>
Subject [jira] Created: (AMQ-2834) Producers blocks when global storeUsage is smaller than persistent adapter chunk size; should warn of incorrect configuration
Date Mon, 19 Jul 2010 07:45:51 GMT
Producers blocks when global storeUsage is smaller than persistent adapter chunk size; should
warn of incorrect configuration
-----------------------------------------------------------------------------------------------------------------------------

                 Key: AMQ-2834
                 URL: https://issues.apache.org/activemq/browse/AMQ-2834
             Project: ActiveMQ
          Issue Type: Improvement
          Components: Broker
    Affects Versions: 5.3.2
            Reporter: Reynald Borer
            Priority: Minor


Defining a global {{storeUsage}} parameter that is smaller than the persistent adapter chunk
size makes all producers blocks as soon as the store is full (when producer flow control is
enabled). It would be nice if ActiveMQ showed a big warning during startup that the used configuration
is not correct.

Here is how to reproduce this:
# start the server;
# produce enough persistent messages in order to reach the store limit (by using ant producer
-Ddurable=true -Dmax=10000); the producer is blocked after N messages;
# check the admin web console, store percent used reports 100%; in the logs "Usage Manager
Store is Full" is reported;
# start a consumer (with ant consumer -Dmax=10000); consumer will consume messages and stop
at N-1 (!)
# then, even if all messages are consumed, the producer is still blocked (and the consumer
is of course still waiting); in the web console, the store percent used is now way higher
than 100%, and no messages are hanging in the queue.

The broker configuration is the following:

{code}
<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">

    <!-- Allows us to use system properties as variables in this configuration file -->
    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"/>

    <broker xmlns="http://activemq.apache.org/schema/core" brokerName="jmsServer" dataDirectory="${activemq.base}/data"
persistent="true">

        <persistenceAdapter>
            <amqPersistenceAdapter directory="${activemq.base}/data" maxFileLength="50
mb" syncOnWrite="false"/>
        </persistenceAdapter>

        <!-- The transport connectors ActiveMQ will listen to -->
        <transportConnectors>
            <transportConnector name="openwire" uri="tcp://0.0.0.0:61616?keepAlive=true&amp;wireFormat.maxInactivityDuration=1200000&amp;connectionTimeout=1200000&amp;soTimeout=1200000"
enableStatusMonitor="true"/>
        </transportConnectors>

        <!--  The maximum about of space the broker will use before slowing down producers
-->
        <systemUsage>
            <systemUsage>
                <memoryUsage>
                    <memoryUsage limit="200 mb"/>
                </memoryUsage>
                <storeUsage>
                    <storeUsage limit="10 mb"/>
                </storeUsage>
                <tempUsage>
                    <tempUsage limit="100 mb"/>
                </tempUsage>
            </systemUsage>
        </systemUsage>

    </broker>
</beans>
{code}


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