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From Dejan Bosanac <de...@nighttale.net>
Subject Re: 5.4.0 stops accepting messages randomly
Date Fri, 10 Sep 2010 07:51:24 GMT
Can you turn on debug logging and post logs and thread dumps when the
broker hangs. Also, do you see messages in logs about producer flow
control being used?


Cheers
--
Dejan Bosanac - http://twitter.com/dejanb

Open Source Integration - http://fusesource.com/
ActiveMQ in Action - http://www.manning.com/snyder/
Blog - http://www.nighttale.net



On Thu, Sep 9, 2010 at 11:33 PM, Matthew Hixson <mhixson@gmail.com> wrote:
> We have been running 5.4.0 in production for a few weeks and it can easily handle tens
of thousands of messages a day, but then for no apparent reason it will cease accepting new
messages from our producers.  The consumers will drain the queue empty, but then nothing
new gets accepted into Active MQ.  Restarting Active MQ and then restarting all the producers
and consumers allows things to proceed as normal.
>  Below is our activemq.xml.
>  Thanks for any help.
>   -M@
>
> <!--
>    Licensed to the Apache Software Foundation (ASF) under one or more
>    contributor license agreements.  See the NOTICE file distributed with
>    this work for additional information regarding copyright ownership.
>    The ASF licenses this file to You under the Apache License, Version 2.0
>    (the "License"); you may not use this file except in compliance with
>    the License.  You may obtain a copy of the License at
>
>    http://www.apache.org/licenses/LICENSE-2.0
>
>    Unless required by applicable law or agreed to in writing, software
>    distributed under the License is distributed on an "AS IS" BASIS,
>    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
>    See the License for the specific language governing permissions and
>    limitations under the License.
> -->
> <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">
>
>    <!-- Allows us to use system properties as variables in this configuration file
-->
>    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
>        <property name="locations">
>            <value>file:${activemq.base}/conf/credentials.properties</value>
>        </property>
>    </bean>
>
>    <!--
>        The <broker> element is used to configure the ActiveMQ broker.
>    -->
>    <broker xmlns="http://activemq.apache.org/schema/core" brokerName="localhost"
dataDirectory="${activemq.base}/data" destroyApplicationContextOnStop="true">
>
>        <!--
>                        For better performances use VM cursor and small memory
limit.
>                        For more information, see:
>
>            http://activemq.apache.org/message-cursors.html
>
>            Also, if your producer is "hanging", it's probably due to producer flow
control.
>            For more information, see:
>            http://activemq.apache.org/producer-flow-control.html
>        -->
>
>        <destinationPolicy>
>            <policyMap>
>              <policyEntries>
>                <policyEntry topic=">" producerFlowControl="false" memoryLimit="100mb">
>                  <pendingSubscriberPolicy>
>                    <vmCursor />
>                  </pendingSubscriberPolicy>
>                </policyEntry>
>                <policyEntry queue=">" producerFlowControl="true" memoryLimit="1mb">
>                  <!-- Use VM cursor for better latency
>                       For more information, see:
>
>                       http://activemq.apache.org/message-cursors.html
>
>                  <pendingQueuePolicy>
>                    <vmQueueCursor/>
>                  </pendingQueuePolicy>
>                  -->
>                </policyEntry>
>              </policyEntries>
>            </policyMap>
>        </destinationPolicy>
>
>
>        <!--
>            The managementContext is used to configure how ActiveMQ is exposed in
>            JMX. By default, ActiveMQ uses the MBean server that is started by
>            the JVM. For more information, see:
>
>            http://activemq.apache.org/jmx.html
>        -->
>        <managementContext>
>            <managementContext createConnector="false"/>
>        </managementContext>
>
>        <!--
>            Configure message persistence for the broker. The default persistence
>            mechanism is the KahaDB store (identified by the kahaDB tag).
>            For more information, see:
>
>            http://activemq.apache.org/persistence.html
>        -->
>        <persistenceAdapter>
>            <kahaDB directory="${activemq.base}/data/kahadb"/>
>        </persistenceAdapter>
>
>
>          <!--
>            The systemUsage controls the maximum amount of space the broker will
>            use before slowing down producers. For more information, see:
>
>            http://activemq.apache.org/producer-flow-control.html
>
>        <systemUsage>
>            <systemUsage>
>                <memoryUsage>
>                    <memoryUsage limit="100 mb"/>
>                </memoryUsage>
>                <storeUsage>
>                    <storeUsage limit="10 gb"/>
>                </storeUsage>
>                <tempUsage>
>                    <tempUsage limit="100 mb"/>
>                </tempUsage>
>            </systemUsage>
>        </systemUsage>
>                -->
>
>        <!--
>            The transport connectors expose ActiveMQ over a given protocol to
>            clients and other brokers. For more information, see:
>
>            http://activemq.apache.org/configuring-transports.html
>        -->
>        <transportConnectors>
>            <transportConnector name="openwire" uri="tcp://0.0.0.0:61616"/>
>        </transportConnectors>
>
>    </broker>
>
>    <!--
>        Uncomment to enable Camel
>        Take a look at activemq-camel.xml for more details
>
>    <import resource="camel.xml"/>
>    -->
>
>    <!--
>        Enable web consoles, REST and Ajax APIs and demos
>        Take a look at activemq-jetty.xml for more details
>    -->
>    <import resource="jetty.xml"/>
>
> </beans>

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