activemq-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "James Strachan" <james.strac...@gmail.com>
Subject Re: single broker + mysql + Attempting to acquire the exclusive lock to become the Master broker
Date Thu, 04 Oct 2007 12:12:55 GMT
Hopefully, ActiveMQ 5 will be out really soon! :)

On 04/10/2007, j0llyr0g3r <timo.roessner@wincor-nixdorf.com> wrote:
>
> Thx James,
>
> i upgraded to the latest snapshot and it works now.
>
> P.S.:
>
> Maybe there should a comment on the download page, that people who want to
> use AMQ + mysql should __not__ take the stable release but the
> snapshot.....:-)
>
> Or am i the only having this problem? I only tested it with mysql 5, maybe
> it worked with mysql 4...
>
>
> James.Strachan wrote:
> >
> > Try upgrading to a newer version; we've fixed up some of the SQL for
> > locking the database.
> >
> > Or if you know you're only gonna run a single broker, you can disable
> > database locking via...
> >
> > http://activemq.apache.org/maven/activemq-core/xsddoc/http___activemq.org_config_1.0/element/jdbcPersistenceAdapter.html#attr_useDatabaseLock
> >
> > <jdbcPersistenceAdapter useDatabaseLock="false">
> >
> > On 02/10/2007, j0llyr0g3r <timo.roessner@wincor-nixdorf.com> wrote:
> >>
> >> Hey folks,
> >>
> >> i'm having real trouble here with mysql and activmq:
> >>
> >> When i start my (single!) broker i get an endless repitition of:
> >>
> >> INFO  DefaultDatabaseLocker          - Attempting to acquire the
> >> exclusive
> >> lock to become the Master broker
> >> INFO  DefaultDatabaseLocker          - Attempting to acquire the
> >> exclusive
> >> lock to become the Master broker
> >> INFO  DefaultDatabaseLocker          - Attempting to acquire the
> >> exclusive
> >> lock to become the Master broker
> >> INFO  DefaultDatabaseLocker          - Attempting to acquire the
> >> exclusive
> >> lock to become the Master broker
> >> INFO  DefaultDatabaseLocker          - Attempting to acquire the
> >> exclusive
> >> lock to become the Master broker
> >> INFO  DefaultDatabaseLocker          - Attempting to acquire the
> >> exclusive
> >> lock to become the Master broker
> >> INFO  DefaultDatabaseLocker          - Attempting to acquire the
> >> exclusive
> >> lock to become the Master broker
> >> INFO  DefaultDatabaseLocker          - Attempting to acquire the
> >> exclusive
> >> lock to become the Master broker
> >>
> >> My configuration:
> >>
> >> - activemq 4.1
> >> - mysql 5.0
> >> - mysql connector 5.0.7
> >>
> >> I am pretty sure that this is some kind of bug, but how do i solve this?
> >>
> >> My broker configuration is quite simple:
> >>
> >> <beans>
> >>   <!-- Allows us to use system properties as variables in this
> >> configuration
> >> file -->
> >>   <bean
> >> class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"/>
> >>
> >>   <broker brokerName="localhost" useJmx="true"
> >> xmlns="http://activemq.org/config/1.0">
> >>
> >>     <memoryManager>
> >>         <usageManager id="memory-manager" limit="20 MB"/>
> >>     </memoryManager>
> >>
> >>     <managementContext>
> >>        <managementContext connectorPort="1099"
> >> jmxDomainName="org.apache.activemq"/>
> >>     </managementContext>
> >>
> >>     <persistenceAdapter>
> >>       <journaledJDBC journalLogFiles="5" dataDirectory="../data"
> >> dataSource="#mysql-ds"/>
> >>     </persistenceAdapter>
> >>
> >>     <transportConnectors>
> >>        <transportConnector name="openwire" uri="tcp://localhost:61616"/>
> >>        <transportConnector name="local_ssl" uri="ssl://localhost:61617"/>
> >>     </transportConnectors>
> >>   </broker>
> >>
> >>   <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="wnmf"/>
> >>      <property name="password" value="wnmf"/>
> >>      <property name="poolPreparedStatements" value="true"/>
> >>   </bean>
> >> </beans>
> >>
> >> What can i do?
> >>
> >> I googled a lot, but found nothing relevant, the only thing i found was:
> >>
> >> SET AUTOCOMMIT = 0;
> >> LOCK TABLE activemq.ACTIVEMQ_LOCK WRITE;
> >>
> >> But this didn't help.
> >>
> >> Thanks for every hint!
> >>
> >> --
> >> View this message in context:
> >> http://www.nabble.com/single-broker-%2B-mysql-%2B-Attempting-to-acquire-the-exclusive-lock-to-become-the-Master-broker-tf4557484s2354.html#a13006218
> >> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
> >>
> >>
> >
> >
> > --
> > James
> > -------
> > http://macstrac.blogspot.com/
> >
> > Open Source SOA
> > http://open.iona.com
> >
> >
>
> --
> View this message in context: http://www.nabble.com/single-broker-%2B-mysql-%2B-Attempting-to-acquire-the-exclusive-lock-to-become-the-Master-broker-tf4557484s2354.html#a13038372
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>
>


-- 
James
-------
http://macstrac.blogspot.com/

Open Source SOA
http://open.iona.com

Mime
View raw message