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https://issues.apache.org/jira/browse/ACTIVEMQ6-82?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14333486#comment-14333486
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Daniel Pocock commented on ACTIVEMQ6-82:
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Marc, please look at the last lines of the script:

https://github.com/apache/activemq-6/blob/master/distribution/activemq/src/main/resources/bin/activemq#L99

JAVA_ARGS is using hardcoded values.  There is no other variable to override it.

Am I just looking at the wrong script or the changes you mention are not in the 
right branch or something else?

> start script limitations
> ------------------------
>
>                 Key: ACTIVEMQ6-82
>                 URL: https://issues.apache.org/jira/browse/ACTIVEMQ6-82
>             Project: Apache ActiveMQ 6
>          Issue Type: Bug
>         Environment: UNIX
>            Reporter: Daniel Pocock
>
> This issue concerns the start script:
> ./distribution/activemq/src/main/resources/bin/activemq
> There are various issues with JAVA_ARGS at the bottom:
> a) memory parameters are hard-coded in the script and can't be overridden 
> without modifying the script
> b) data.dir is hardcoded in the script and can't be overridden without 
> modifying the script
> Problem (a) was also present in HornetQ while problem (b) was not there.
> With HornetQ 2.3, it was possible to override the data.dir and also add other 
> properties or JMXetric to the JVM command line by setting the CLUSTER_PROPS 
> variable in a local wrapper script.  However, setting heap parameters in 
> CLUSTER_PROPS was ineffective because the HornetQ run.sh would then set them 
> to other values later on the command line.
> JBoss / Wildfly seems to do a better job of splitting the logic and 
> configuration, they have a script called bin/standalone.sh that contains the 
> logic and a separate file, bin/standalone.conf that can be customized with 
> environment variables.  I think this would be a good model for ActiveMQ 6 to 
> follow.  Is there already any discussion about refactoring the script?
> This is important for various reasons:
> - people deploying the broker in production environments don't like to modify 
> the scripts supplied by a vendor, they usually prefer to have a configuration 
> file of their own
> - when upgrading, it is an extra hassle to merge changes into the scripts if 
> they have been modified locally
> - some people may want to run multiple instances using the same installation 
> directory, same scripts and just using different data and log directories



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