[jira] Commented: (AMQ-992) MySQL doesn't honor lock in JDBC Master Slave configuration?

["Steven Lotito (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/activemq/browse/AMQ-992?page=comments#action_37491 ] 
            
Steven Lotito commented on AMQ-992:
-----------------------------------

The following should work for MySQL 5.x and the tables that are generated...

SET AUTOCOMMIT = 0;
LOCK TABLE activemq.ACTIVEMQ_LOCK WRITE;

> MySQL doesn't honor lock in JDBC Master Slave configuration?
> ------------------------------------------------------------
>
>                 Key: AMQ-992
>                 URL: https://issues.apache.org/activemq/browse/AMQ-992
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 4.1.0
>         Environment: RHEL 4
> MySQL 4.x, 5.x
> mysql-ab_jdbc_driver
>            Reporter: Steven Lotito
>         Attachments: mysql_obtain_lock.txt
>
>
> I have been attempting to get the new 4.1 JDBC Master Slave configuration working with MySQL.
> The log from the first broker to start up states:
> 2006-10-18 09:35:08,558 [main           ] INFO  DefaultDatabaseLocker          - Attempting to acquire the exclusive lock to become the Master broker
> 2006-10-18 09:35:08,559 [main           ] INFO  DefaultDatabaseLocker          - Becoming the master on dataSource: org.apache.commons.dbcp.BasicDataSource@136d9d8
> The 2nd broker to start up has an identical message and both brokers listen for connections.
> The 2nd broker should be waiting for the lock and NOT accepting connections, if I understand http://www.activemq.org/site/jdbc-master-slave.html correctly...
> Oracle exhibits the expected behavior:
> When running the exact same configuration (except using an Oracle datasource), the first broker has the same log message as above,  while the 2nd broker halts at the "Attempting to acquire the exclusive lock to become the Master broker" message until I fail the master.  Then it becomes the master.
> Is this a known issue?  I was able to replicate it using both MySql 4 and 5 (trying both the MySQL Connector/J 3.1 and MySQL Connector/J 5.0 drivers)

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: https://issues.apache.org/activemq/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira