Hi Sandeep,
I think using the latest snapshot for 4.2 will help:
http://people.apache.org/repo/m2-snapshot-repository/org/apache/
activemq/apache-activemq/4.2-incubator-SNAPSHOT/
cheers,
Rob
On 5 Feb 2007, at 15:20, Sandeep Chayapathi wrote:
Hi all,
As a followup to these questions:
http://http://www.nabble.com/how-to-set-the-message-of-the-broker-
will-store-in-the-mySQL-only-tf2957449.html#a8294916
how to set the message...
http://www.nabble.com/Queue-Memory-Limits-tf1857084.html Queue
Memory limit
http://www.nabble.com/Async-Exception%3A-Broken-Pipe-
tf3160498.html#a8765808
Async exception
My bane of existence has been activemq, for a while now. The single
issue,
is activemq running out of heap memory, when I use offline durable
subscribers. I wondered if by using db persistence, instead of caching
messages, would solve this proble. To that end, I modified my
activemq.xml,
thusly:
------
<beans>
<bean
class="org.springframework.beans.factory.config.PropertyPlaceholderCon
figurer"/>
<broker brokerName="localhost" useJmx="true"
xmlns="http://activemq.org/config/1.0"; persistent="true">
<memoryManager>
<usageManager id="memory-manager" limit="1024 MB"/>
</memoryManager>
<persistenceAdapter>
<jdbcPersistenceAdapter dataSource="#mysql-ds"/>
</persistenceAdapter>
</broker>
<!-- MySql DataSource Sample Setup -->
<bean id="mysql-ds" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url"
value="jdbc:mysql://localhost/activemq?relaxAutoCommit=true"/>
<property name="username" value="sandeep"/>
<property name="password" value="password"/>
<property name="poolPreparedStatements" value="false"/>
</bean>
</beans>
-----
I had 3 offline durable subscribers, to a topic (tired with queues
also) and
1 producer, which pumped in messages to the topic. The jvm was
started with
-Xmx1024M.
I found that, although the messages were supposed to be persisted
to the
mysql db, all the tables were empty. Once the memory usage hit the
jvm's max
allocated memory, I got the dreaded
"java.lang.OutOfMemoryError: Java heap space", yet no messages were
found in
the datastore.
Can anyone pls enlighten me why the un-acked messages were not being
persisted to the datastore and if there is a way to force activemq to
persist messages ? Thanks
- Sandeep
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