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https://issues.apache.org/jira/browse/GERONIMO-4499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12661725#action_12661725
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Donald Woods commented on GERONIMO-4499:
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Found the following in the Spring Reference PDF.  Maybe we can inject our 
config-substitutions.properties into the AMQ config and then use the 
${portOffset} in the XML?

A.2.8. The context schema 
The context tags deal with ApplicationContext configuration that relates to 
plumbing - that is, not usually 
beans that are important to an end-user but rather beans that do a lot of grunt 
work in Spring, such as 
BeanfactoryPostProcessors. The following snippet references the correct schema 
so that the tags in the 
context namespace are available to you. 
<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns="http://www.springframework.org/schema/beans"; 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; 
xmlns:context="http://www.springframework.org/schema/context"; 
xsi:schemaLocation=" 
http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd 
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-2.5.x 
<!-- <bean/> definitions here --> 
</beans> 
Note 
The context schema was only introduced in Spring 2.5. 

A.2.8.1. <property-placeholder/> 
This element activates the replacement of ${...} placeholders, resolved against 
the specified properties file (as 
a Spring resource location). This element is a convenience mechanism that sets 
up a 
PropertyPlaceholderConfigurer for you; if you need more control over the 
PropertyPlaceholderConfigurer, just define one yourself explicitly. 



> can't use PortOffset in var\config\config-substitutions.properties to start 
> two geronimo instance at the same machine.
> ----------------------------------------------------------------------------------------------------------------------
>
>                 Key: GERONIMO-4499
>                 URL: https://issues.apache.org/jira/browse/GERONIMO-4499
>             Project: Geronimo
>          Issue Type: Bug
>      Security Level: public(Regular issues) 
>          Components: ActiveMQ
>    Affects Versions: 2.2
>         Environment: Windows XP SP 2 + IBM SDK 1.5.0
>            Reporter: Shawn Jiang
>            Priority: Minor
>
> I'm trying to use PortOffset in var\config\config-substitutions.properties to 
> start two geronimo instance at the same machine.
> 1, install two geronimo server  serverA, serverB.
> 2, update the PortOffset in var\config\config-substitutions.properties from 0 
> to 10 for serverB.
> 3, start serverA.
> 4, start serverB.
> *expected result*:  Both serverA and serverB could be started without 
> problems.
> *actual result*: serverA started, but server B failed to start with a 
> exception below in log:
> -------------------------------------
> 2009-01-07 17:23:08,562 ERROR [BrokerService] Failed to start ActiveMQ JMS 
> Message Broker. Reason: java.io.IOException: Transport Connector could not be 
> registered in JMX: Failed to bind to server socket: tcp://localhost:61616 due 
> to: java.net.BindException: Address already in use: JVM_Bind
> java.io.IOException: Transport Connector could not be registered in JMX: 
> Failed to bind to server socket: tcp://localhost:61616 due to: 
> java.net.BindException: Address already in use: JVM_Bind
>       at 
> org.apache.activemq.util.IOExceptionSupport.create(IOExceptionSupport.java:27)
>       at 
> org.apache.activemq.broker.BrokerService.registerConnectorMBean(BrokerService.java:1427)
>       at 
> org.apache.activemq.broker.BrokerService.startTransportConnector(BrokerService.java:1886)
>       at 
> org.apache.activemq.broker.BrokerService.startAllConnectors(BrokerService.java:1837)
>       at 
> org.apache.activemq.broker.BrokerService.start(BrokerService.java:473)

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